{"title":"Victron Battery Isolators","description":"\u003cp\u003eVictron battery isolators and combiners let a single alternator or charger keep two or more battery banks topped up without one bank draining into another. Cyrix combiners use a voltage-sensing relay to connect and disconnect banks automatically, which suits split-charge setups in motorhomes, boats and professional vehicles. Argodiode isolators offer a simpler alternative where a small voltage drop is acceptable.\u003c\/p\u003e\u003cp\u003eThe range also includes BatteryProtect units, which disconnect a load before the battery is damaged by over-discharge, and the Battery Balancer for keeping series-connected batteries in step. Models cover 12V, 24V and 48V systems with current ratings from 65A up to 220A, so the right choice depends on the size of the load and the system voltage in use.\u003c\/p\u003e","products":[{"product_id":"victron-batteryprotect-65a-isolator","title":"Victron BatteryProtect 12\/24V 65A Battery Isolator | BPR000065400","description":"\u003cp\u003eThe Victron BatteryProtect 12\/24V-65A is an electronic battery isolator that disconnects a load from the battery once voltage drops to a damaging level. Built for 12V and 24V systems, it suits marine, off-grid and vehicle installations where over-discharge protection matters.\u003c\/p\u003e\u003ch2\u003eKey features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eContinuous current\u003c\/strong\u003e, rated at 65A, suitable for moderate to heavy DC loads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual voltage\u003c\/strong\u003e, works on 12V or 24V systems without manual adjustment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProgrammable thresholds\u003c\/strong\u003e, low-voltage disconnect and reconnect points are set via a rotary switch.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemote on\/off input\u003c\/strong\u003e, allows integration with a BMS or external control signal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow standby draw\u003c\/strong\u003e, self-consumption below 1mA.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSolid-state switching\u003c\/strong\u003e, no mechanical relay contacts to wear.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eHow it works\u003c\/h2\u003e\u003cp\u003eThe unit monitors battery voltage continuously and disconnects the load circuit once voltage falls below the programmed threshold, which prevents deep discharge, the main cause of early battery failure in lead-acid and lithium systems. When the battery recovers to the reconnect voltage, the load is restored automatically after a short delay.\u003c\/p\u003e\u003cp\u003eThe rotary switch offers pre-set voltage profiles for common battery chemistries and system voltages. The remote input lets a BMS trigger a disconnect independently of the voltage threshold, making this a useful last line of defence in lithium installations where fast load shedding is needed. An alarm output can drive an LED or feed a monitoring system ahead of a full disconnect.\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eOver-discharge protection for lead-acid and lithium batteries in off-grid solar systems.\u003c\/li\u003e\n\u003cli\u003eLoad disconnect in marine and narrowboat 12V or 24V house battery banks.\u003c\/li\u003e\n\u003cli\u003eVehicle and motorhome auxiliary battery protection.\u003c\/li\u003e\n\u003cli\u003eBMS-controlled load shedding in lithium battery installations.\u003c\/li\u003e\n\u003cli\u003eCaravan and campervan DC load protection.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation notes\u003c\/h2\u003e\u003cp\u003eFit the BatteryProtect in the load circuit only, never between the battery and a charger. It is not suitable for inverters or other inductive loads unless specified. Size the wiring for the 65A rating and protect it with a fuse at the battery. Installation by a qualified 12V or marine electrician is recommended, especially for lithium systems where correct BMS integration matters.\u003c\/p\u003e\u003ch2\u003eWhat's in the box\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e1 x Victron BatteryProtect 12\/24V-65A unit\u003c\/li\u003e\u003c\/ul\u003e","brand":"Victron Energy","offers":[{"title":"Default Title","offer_id":52060522348832,"sku":"BPR000065400","price":27.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1010\/8148\/1504\/files\/ledandsolar-bpr000065400-1.webp?v=1785492047"},{"product_id":"battery-balancer-victron-24v-48v","title":"Battery Balancer for 12V to 24V\/48V Banks | Victron BBA000100100","description":"\u003cp\u003eThe Victron Battery Balancer equalises the charge across two 12V batteries wired in series to form a 24V bank. It suits installers building 24V systems from 12V batteries, where small differences in condition or charge acceptance cause drift over time. Left alone, this drift shortens battery life and cuts usable capacity. The balancer corrects it automatically, with no programming or user adjustment needed.\u003c\/p\u003e\u003ch2\u003eVictron battery balancer key features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eBalances two 12V batteries wired in series within a 24V bank, correcting voltage differences between them.\u003c\/li\u003e\n\u003cli\u003eActivates once the difference between the two batteries exceeds 0.1V, drawing up to 0.7A from the higher battery.\u003c\/li\u003e\n\u003cli\u003eNo configuration, software or user intervention needed once wired in.\u003c\/li\u003e\n\u003cli\u003eLED indicator shows balancing activity, useful for confirming correct operation during checks.\u003c\/li\u003e\n\u003cli\u003eMultiple units can be connected in series for 48V systems built from 12V batteries.\u003c\/li\u003e\n\u003cli\u003eSealed enclosure suited to battery boxes, plant rooms and marine or vehicle compartments.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eHow it works\u003c\/h2\u003e\u003cp\u003eIn a 24V bank made from two series-connected 12V batteries, one battery often charges or discharges slightly faster than the other, due to manufacturing tolerance, age or temperature. Over repeated cycles this gap widens, leaving one battery overcharged while the other stays undercharged. The balancer monitors the midpoint voltage and draws current from the higher battery whenever the imbalance passes 0.1V, bringing both back into line.\u003c\/p\u003e\u003cp\u003eIt works passively and continuously, with no connection to the charge controller, inverter or battery monitor needed. It sits alongside the bank and does its job independently, which makes it simple to retrofit into an existing 24V system or specify for a new one. For a 48V bank built from four 12V batteries, two Battery Balancers are wired in series to cover both halves.\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e24V battery banks assembled from two 12V lead-acid, gel or AGM batteries in series.\u003c\/li\u003e\n\u003cli\u003e48V battery banks assembled from four 12V batteries, using two Battery Balancers.\u003c\/li\u003e\n\u003cli\u003eOff-grid solar installations where consistent charge balance extends battery service life.\u003c\/li\u003e\n\u003cli\u003eMarine and vehicle 24V systems where space for balancing equipment is limited.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation notes\u003c\/h2\u003e\u003cp\u003eFit the balancer across the midpoint of the 24V bank, connecting to the positive and negative terminals of each battery in the pair. Confirm battery chemistry and wiring configuration before installation. For 48V banks, install two units in series and check polarity carefully. As with any DC battery wiring, use a qualified installer where the unit forms part of a wider solar PV, inverter or off-grid system.\u003c\/p\u003e\u003ch2\u003eWhat's in the box\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e1 x Victron Battery Balancer\u003c\/li\u003e\n\u003cli\u003eConnection cables for wiring across the battery pair\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Victron Energy","offers":[{"title":"Default Title","offer_id":52060524380448,"sku":"BBA000100100","price":37.35,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1010\/8148\/1504\/files\/ledandsolar-bba000100100-1.webp?v=1785492305"},{"product_id":"victron-batteryprotect-100a-isolator","title":"Victron BatteryProtect 12\/24V-100A Battery Isolator | BPR000100400","description":"\u003cp\u003eThe Victron BatteryProtect 12\/24V-100A is an automatic battery isolator switch that protects 12V and 24V lead-acid and lithium batteries from over-discharge. It sits between the battery and its DC loads, opening the circuit once voltage falls to a preset threshold and closing it again automatically once the battery recovers.\u003c\/p\u003e\u003ch2\u003eKey features of this battery isolator switch\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eContinuous current rating\u003c\/strong\u003e: 100A, suitable for substantial DC load banks in 12V and 24V systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomatic disconnect\u003c\/strong\u003e: triggered by a user-selectable low-voltage threshold.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomatic reconnect\u003c\/strong\u003e: resumes supply once battery voltage recovers to the preset level.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual voltage\u003c\/strong\u003e: works with both 12V and 24V battery systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow voltage drop\u003c\/strong\u003e: minimises resistive losses across the device.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.5 kg, easy to fit into tight enclosures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemote on\/off input\u003c\/strong\u003e: allows control from an external BMS, a charge controller or a toggle switch.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cp\u003eFitted in caravans, motorhomes and campervans to stop leisure batteries being drained by DC appliances. Used on narrowboats, yachts and motorboats with 12V or 24V house banks, in off-grid solar systems where loads need disconnecting during periods of low solar input, and in vehicle conversions or mobile workshops running tools and lighting from a battery supply. Also suited to remote telecoms and monitoring installations on battery-backed DC power.\u003c\/p\u003e\u003ch3\u003eInstallation notes\u003c\/h3\u003e\u003cp\u003eThis is a load-side disconnect device only and must not be placed in the charging circuit. Wiring should be rated for 100A continuous current, with appropriate fusing fitted on the battery side. A qualified installer should set the disconnect and reconnect thresholds correctly for the battery chemistry in use.\u003c\/p\u003e\u003ch2\u003eWhat's in the box\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e1 x Victron BatteryProtect 12\/24V-100A\u003c\/li\u003e\u003c\/ul\u003e","brand":"Victron Energy","offers":[{"title":"Default Title","offer_id":52060749168928,"sku":"BPR000100400","price":39.33,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1010\/8148\/1504\/files\/ledandsolar-bpr000100400-1.webp?v=1785502401"},{"product_id":"smart-batteryprotect-12-24v-100a","title":"Victron Smart BatteryProtect 12\/24V 100A Battery Isolator | BPR110022000","description":"\u003cp\u003eThe Victron Smart BatteryProtect 12\/24V-100A is a load disconnect device that protects 12V and 24V batteries from deep discharge. It suits off-grid solar systems, marine installations and motorhomes, disconnecting non-essential loads at a programmable voltage threshold to preserve battery capacity and extend battery life.\u003c\/p\u003e\u003ch2\u003eKey features of this battery isolator switch\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLoad current\u003c\/strong\u003e, compatible with 12V and 24V systems up to 100A continuous.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBluetooth connectivity\u003c\/strong\u003e, configure, monitor and update firmware via the VictronConnect app.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProgrammable thresholds\u003c\/strong\u003e, set disconnect and reconnect voltages to suit different battery chemistries.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLithium preset\u003c\/strong\u003e, dedicated setting for Li-ion battery systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemote on\/off input\u003c\/strong\u003e, can be controlled by a BMS, charge controller or other system component.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlarm output\u003c\/strong\u003e, sends a pre-disconnect warning so connected equipment can shut down gracefully.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e, 0.5 kg.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eHow it works\u003c\/h2\u003e\u003cp\u003eThe unit monitors battery voltage continuously and disconnects the load circuit once voltage drops below the configured threshold, preventing deep discharge. When the battery recovers to the reconnect threshold after charging, the load connection is restored automatically. Both thresholds are set via Bluetooth in the VictronConnect app, with no DIP switches or physical access needed. The alarm output activates above the disconnect threshold, giving loads such as inverters or data loggers time for a controlled shutdown. The remote on\/off input lets a BMS or charge controller switch the unit off when required.\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eOff-grid solar systems needing protection from deep discharge.\u003c\/li\u003e\n\u003cli\u003eMarine and narrowboat house battery banks.\u003c\/li\u003e\n\u003cli\u003eMotorhomes and campervans with 12V or 24V leisure battery loads.\u003c\/li\u003e\n\u003cli\u003eTelecoms and remote monitoring installations.\u003c\/li\u003e\n\u003cli\u003eLithium battery systems requiring a configurable low-voltage disconnect.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhat's in the box\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e1x Victron Smart BatteryProtect 12\/24V-100A (BPR110022000)\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eInstallation notes\u003c\/h3\u003e\u003cp\u003eThis is a load-side disconnect device and must not be fitted between a battery and a charger or solar charge controller. Cable sizing should match the 100A rating, with suitable fusing on the battery side. Configuration is done via VictronConnect over Bluetooth, and installation should be carried out by someone experienced with 12V\/24V DC wiring.\u003c\/p\u003e","brand":"Victron Energy","offers":[{"title":"Default Title","offer_id":52060749267232,"sku":"BPR110022000","price":48.04,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1010\/8148\/1504\/files\/ledandsolar-bpr110022000-1.webp?v=1785502473"},{"product_id":"victron-batteryprotect-220a-isolator","title":"Victron BatteryProtect 12\/24V-220A Battery Isolator | BPR000220400","description":"\u003cp\u003eThe Victron BatteryProtect 12\/24V-220A (BPR000220400) is an automatic disconnect device that protects 12V and 24V lead-acid and lithium batteries from over-discharge. It disconnects the load before voltage drops to a damaging level, then reconnects automatically once the battery recovers. Suited to marine, off-grid, vehicle and industrial systems.\u003c\/p\u003e\u003ch2\u003eKey features of this battery isolator switch\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eContinuous current rating\u003c\/strong\u003e, 220A, suitable for high-load 12V and 24V systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomatic disconnect and reconnect\u003c\/strong\u003e, based on configurable voltage thresholds.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual voltage compatibility\u003c\/strong\u003e, works with both 12V and 24V battery systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow self-consumption\u003c\/strong\u003e, minimises parasitic drain when the system is idle.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlarm output\u003c\/strong\u003e, signals a low-voltage condition before disconnection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemote on\/off input\u003c\/strong\u003e, allows control from an external switch or a battery management system.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e, 0.912 kg.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eHow it works\u003c\/h2\u003e\u003cp\u003eThe BatteryProtect monitors battery voltage continuously and opens the load circuit once voltage falls to a preset threshold, preventing the deep discharge that shortens battery life. When voltage recovers to the reconnect point, the load is restored automatically. At 220A it handles inverters, pumps, winches and other high-draw equipment. The remote on\/off input lets a BMS or external switch take control, and the alarm output can be wired to a warning light for advance notice before load shedding occurs.\u003c\/p\u003e\u003ch3\u003eInstallation notes\u003c\/h3\u003e\u003cp\u003eFit the BatteryProtect on the load side of the battery only; it must not be used to interrupt charging current. Installation should be carried out by someone familiar with DC battery systems, with connections and fusing rated for 220A. On off-grid solar systems, check that the protection settings suit the battery chemistry in use.\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eOff-grid solar systems needing load-side over-discharge protection.\u003c\/li\u003e\n\u003cli\u003eMarine house battery banks.\u003c\/li\u003e\n\u003cli\u003eMotorhomes, campervans and commercial vehicles with auxiliary batteries.\u003c\/li\u003e\n\u003cli\u003eIndustrial and telecoms backup power systems with automatic load shedding.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhat's in the box\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e1x Victron BatteryProtect 12\/24V-220A (BPR000220400)\u003c\/li\u003e\u003c\/ul\u003e","brand":"Victron Energy","offers":[{"title":"Default Title","offer_id":52060749529376,"sku":"BPR000220400","price":68.24,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1010\/8148\/1504\/files\/ledandsolar-bpr000220400-1.webp?v=1785502632"},{"product_id":"smart-batteryprotect-48v-100a","title":"Victron Smart BatteryProtect 48V-100A Load Disconnect | BPR110048000","description":"\u003cp\u003eThe Victron Smart BatteryProtect 48V-100A is a load disconnect device for 48V battery banks, protecting against over-discharge and over-voltage. It suits off-grid installers, marine electricians and commercial integrators who need programmable battery protection without a full battery management system handling load shedding.\u003c\/p\u003e\u003ch2\u003eKey features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eContinuous current\u003c\/strong\u003e, rated for 48V systems at 100A, suited to substantial DC load circuits.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBluetooth control\u003c\/strong\u003e, configure thresholds and monitor status wirelessly through the VictronConnect app.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProgrammable thresholds\u003c\/strong\u003e, low-voltage disconnect and reconnect points can be set for lead-acid, AGM, gel or lithium chemistries.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOver-voltage disconnect\u003c\/strong\u003e, protects downstream loads from voltage spikes during charging.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReconnect logic\u003c\/strong\u003e, the unit waits for the battery to recover to the set reconnect voltage before restoring the load, preventing rapid cycling.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemote on\/off input\u003c\/strong\u003e, allows integration with external control signals, including other Victron system components.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e, 0.8 kg.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eProduct overview\u003c\/h2\u003e\u003cp\u003eThe unit monitors battery voltage continuously and disconnects the load circuit once voltage falls below the programmed threshold, preventing deep discharge events that shorten battery life. For lithium batteries it adds a hardware-level layer of protection alongside the battery's own BMS.\u003c\/p\u003e\u003cp\u003eConfiguration is done through VictronConnect over Bluetooth rather than physical DIP switches or a display, which suits enclosed installations such as under-floor battery compartments, marine bilge areas or cabinet-mounted off-grid systems. The over-voltage disconnect responds if a charger or solar charge controller pushes voltage above safe limits, opening the load circuit to protect connected inverters and converters.\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eOff-grid solar systems needing automatic load disconnection before damaging discharge levels are reached.\u003c\/li\u003e\n\u003cli\u003eMarine and narrowboat installations requiring load shedding to protect the house battery bank.\u003c\/li\u003e\n\u003cli\u003eMotorhome and campervan builds with 48V lithium or lead-acid leisure batteries.\u003c\/li\u003e\n\u003cli\u003eTelecom and remote monitoring sites where battery longevity matters and visits are infrequent.\u003c\/li\u003e\n\u003cli\u003eCommercial cabinets where Bluetooth commissioning avoids the need for physical access.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation notes\u003c\/h2\u003e\u003cp\u003eFit the Smart BatteryProtect in the load circuit only, between battery and loads, never in series with a charger output. On 48V lithium systems, installation should be carried out by a qualified electrician. Cabling must be rated for the full 100A continuous current, with appropriate fusing on the battery side per wiring regulations. Configuration requires a Bluetooth-enabled device running VictronConnect.\u003c\/p\u003e\u003ch2\u003eWhat's in the box\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e1 x Victron Smart BatteryProtect 48V-100A (BPR110048000)\u003c\/li\u003e\u003c\/ul\u003e","brand":"Victron Energy","offers":[{"title":"Default Title","offer_id":52060753527072,"sku":"BPR110048000","price":118.64,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1010\/8148\/1504\/files\/ledandsolar-bpr110048000-1.webp?v=1785503627"},{"product_id":"smart-batteryprotect-12-24v-65a","title":"Victron Smart BatteryProtect 12\/24V 65A Load Disconnect | BPR065022000","description":"\u003cp\u003eThe Victron Smart BatteryProtect is a load disconnect device that protects 12V and 24V batteries from over-discharge and over-voltage damage. Rated at 65A continuous, it suits off-grid systems, marine installations, campervans and any setup where load management matters. Bluetooth connectivity links it to the VictronConnect app, so installers and owners can check status and adjust settings without opening the unit.\u003c\/p\u003e\u003ch2\u003eKey features of the Victron Smart BatteryProtect\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLoad disconnect rating\u003c\/strong\u003e, 65A continuous, for 12V and 24V battery systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBluetooth connectivity\u003c\/strong\u003e, configure and monitor via the VictronConnect app on iOS and Android.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProgrammable thresholds\u003c\/strong\u003e, low-voltage disconnect and reconnect points can be set to suit different battery chemistries.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOver-voltage protection\u003c\/strong\u003e, programmable high-voltage disconnect guards sensitive loads from spikes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLi-ion mode\u003c\/strong\u003e, communicates directly with compatible Victron lithium battery management systems through a dedicated port.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlarm output\u003c\/strong\u003e, signals low-voltage conditions to external indicators or devices.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e, 205g, for installation in confined spaces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo quiescent draw\u003c\/strong\u003e, draws no current when switched off, so battery charge is preserved.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eHow it works\u003c\/h2\u003e\u003cp\u003eThe unit tracks battery voltage and disconnects the load once voltage falls below a threshold set by the installer, preventing the deep discharge that shortens battery life. When voltage recovers to the reconnect point, the load switches back on automatically. The delay between disconnect and reconnect is configurable, which stops rapid cycling where voltage recovery is slow.\u003c\/p\u003e\u003cp\u003eThis is a one-way protection device for load circuits. It must not be fitted between a charger and a battery, since it is not designed to carry charging current.\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cp\u003eUsed for auxiliary load protection in off-grid solar systems, marine circuits, campervans, caravans, motorhomes, light commercial vehicles and remote monitoring or telecoms equipment running on 12V or 24V batteries.\u003c\/p\u003e\u003ch3\u003eInstallation notes\u003c\/h3\u003e\u003cp\u003eFit the BatteryProtect in the load circuit only, between battery and DC loads. Size cables and fuses on both sides for the 65A rating. Check BMS compatibility before enabling Li-ion mode on lithium systems. Installation should be carried out by a qualified electrician or experienced DC systems integrator.\u003c\/p\u003e\u003ch2\u003eWhat's in the box\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e1x Victron Smart BatteryProtect 12\/24V-65A (BPR065022000)\u003c\/li\u003e\u003c\/ul\u003e","brand":"Victron Energy","offers":[{"title":"Default Title","offer_id":52060756181280,"sku":"BPR065022000","price":40.4,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1010\/8148\/1504\/files\/ledandsolar-bpr065022000-1.webp?v=1785504035"},{"product_id":"victron-48v-battery-isolator-100a","title":"Victron BatteryProtect 48V 100A Battery Isolator | BPR048100400","description":"\u003cp\u003eThe Victron BatteryProtect 48V-100A is an automatic battery isolator switch that protects 48V battery banks from over-discharge. It disconnects the load before voltage drops to a critically low level, guarding cells against damage and helping extend battery service life. It suits off-grid solar systems, marine installations and other 48V DC setups where load shedding is needed.\u003c\/p\u003e\u003ch2\u003eKey features of this battery isolator switch\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCurrent rating\u003c\/strong\u003e, 100A continuous on a 48V system.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomatic disconnect\u003c\/strong\u003e, triggers on low battery voltage with a configurable reconnect threshold.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow self-consumption\u003c\/strong\u003e, minimal parasitic drain on the battery bank when idle.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemote on\/off input\u003c\/strong\u003e, integrates with battery management systems, inverters or a manual switch.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlarm output\u003c\/strong\u003e, gives a pre-disconnect warning so loads can shut down before isolation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChemistry compatibility\u003c\/strong\u003e, works with lithium (LiFePO4) and lead-acid batteries, with thresholds set via a rotary switch.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e, 0.8 kg, suitable for panel or DIN rail mounting.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eHow it works\u003c\/h2\u003e\u003cp\u003eThe unit monitors battery voltage continuously. Once voltage falls to the programmed disconnect point, it opens the load circuit and holds it open until the battery recovers to the reconnect voltage, avoiding the sustained low-voltage conditions that cause capacity loss in lead-acid and lithium cells. Pre-set voltage profiles are selected via the rotary switch, without programming tools.\u003c\/p\u003e\u003cp\u003eThe remote input accepts a signal from a Victron BMV battery monitor, a BMS, or a simple switch, so the unit can be overridden or controlled within a larger system. The alarm output can drive an LED indicator or feed a monitoring system, giving warning ahead of full disconnect.\u003c\/p\u003e\u003cp\u003eThis is a load-side device only. It should be wired between the battery and the loads, not between the battery and the charger.\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eOff-grid solar systems with 48V battery banks needing automatic disconnect on low voltage.\u003c\/li\u003e\n\u003cli\u003eMarine and narrowboat DC systems protecting auxiliary load circuits.\u003c\/li\u003e\n\u003cli\u003eMotorhome and vehicle conversions running 48V DC distribution.\u003c\/li\u003e\n\u003cli\u003eTelecom and remote monitoring installations with 48V battery backup.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eInstallation notes\u003c\/h3\u003e\u003cp\u003eFit on the load side of the battery bank, never in the charge circuit. Wiring should be sized for 100A continuous current and protected with a suitably rated fuse. Installation should be carried out by a qualified electrician familiar with DC battery systems, observing relevant wiring regulations.\u003c\/p\u003e\u003ch2\u003eWhat's in the box\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e1 x Victron BatteryProtect 48V-100A (BPR048100400)\u003c\/li\u003e\u003c\/ul\u003e","brand":"Victron Energy","offers":[{"title":"Default Title","offer_id":52060759523616,"sku":"BPR048100400","price":102.89,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1010\/8148\/1504\/files\/ledandsolar-bpr048100400-1.webp?v=1785504421"},{"product_id":"smart-battery-protect-220a","title":"Victron Smart BatteryProtect 12\/24V-220A | BPR122022000","description":"\u003cp\u003eThe Victron Smart BatteryProtect 12\/24V-220A (BPR122022000) is a programmable battery protection device that disconnects non-essential DC loads before a battery reaches a damaging depth of discharge. It suits off-grid, marine, vehicle and backup power installations where protecting the battery from over-discharge matters.\u003c\/p\u003e\u003ch2\u003eVictron Smart Battery Protect features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCurrent rating\u003c\/strong\u003e, 220A continuous DC load current on 12V or 24V systems, with no voltage conversion losses.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBluetooth connectivity\u003c\/strong\u003e, configure thresholds and monitor status wirelessly through the VictronConnect app.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProgrammable thresholds\u003c\/strong\u003e, disconnect and reconnect voltages can be set for lead-acid or lithium batteries.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemote on\/off input\u003c\/strong\u003e, accepts a signal from a battery management system or other control device.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlarm output\u003c\/strong\u003e, sends a pre-disconnect warning so connected equipment can shut down before power is cut.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow self-consumption\u003c\/strong\u003e, minimises parasitic drain on the battery once the load is disconnected.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eHow it works\u003c\/h2\u003e\u003cp\u003eThe unit monitors battery voltage continuously and disconnects the load circuit once voltage falls to a user-defined threshold, preventing deep discharge events that permanently reduce battery capacity. When the battery recovers to the set reconnect voltage, the load is restored automatically, and the reconnect delay is configurable to avoid rapid cycling. VictronConnect gives live voltage readings and history, useful for commissioning and fault-finding in awkward locations such as under-floor compartments or engine bays.\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cp\u003eUsed in off-grid solar systems, marine and narrowboat house battery banks, motorhome and campervan leisure batteries, vehicle auxiliary power systems and backup power setups needing automatic load shedding. In lithium installations, the remote on\/off input lets a BMS force a disconnect independently of voltage thresholds.\u003c\/p\u003e\u003ch2\u003eInstallation notes\u003c\/h2\u003e\u003cp\u003eFit the Smart BatteryProtect in the load circuit only, between the battery and the DC loads. It must not be used in a charge circuit or to disconnect a charger from the battery. For lithium systems, connecting the BMS remote signal to the on\/off input is recommended.\u003c\/p\u003e\u003ch2\u003eWhat's in the box\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e1x Victron Smart BatteryProtect 12\/24V-220A (BPR122022000)\u003c\/li\u003e\u003c\/ul\u003e","brand":"Victron Energy","offers":[{"title":"Default Title","offer_id":52060762243360,"sku":"BPR122022000","price":90.29,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1010\/8148\/1504\/files\/ledandsolar-bpr122022000-1.webp?v=1785505151"},{"product_id":"victron-cyrix-ct-120a-combiner","title":"Victron Cyrix-ct 12\/24V 120A Intelligent Battery Combiner | CYR010120011","description":"\u003cp\u003eThe Victron Cyrix-ct is a microprocessor-controlled battery combiner for 12V and 24V systems, rated at 120A continuous current. It joins battery banks in parallel while a charge source is active and separates them once charging stops, so the starter or primary battery is not drained by auxiliary loads.\u003c\/p\u003e\u003ch2\u003eKey features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem voltage\u003c\/strong\u003e, 12V or 24V DC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContinuous current rating\u003c\/strong\u003e, 120A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e, 0.12 kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBattery chemistries\u003c\/strong\u003e, lead-acid, AGM, gel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSolid-state design\u003c\/strong\u003e, no moving parts\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSKU\u003c\/strong\u003e, CYR010120011, GTIN 8719076022138\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eHow it works\u003c\/h2\u003e\u003cp\u003eThe unit watches the voltage on both battery banks. When voltage on either bank rises to the connect threshold, an alternator, shore charger or solar controller is assumed to be active and the internal relay closes, putting both banks in parallel so they charge together. When the source is removed and voltage drops back to the disconnect threshold, the relay opens and the banks separate again. This stops a discharged auxiliary bank from pulling down a starter battery. The thresholds are pre-set by Victron for standard lead-acid chemistry. The ct designation marks this as the version for conventional alternators and chargers, distinct from the Cyrix-Li range built for lithium systems. Some installations need a connection to an ignition or charge-detect signal so the unit responds correctly to an alternator.\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cp\u003eUsed in motorhomes and campervans to keep a starter battery isolated from leisure circuit loads, in marine dual-battery setups protecting the engine-start battery, and in agricultural, commercial and 4x4 vehicles running auxiliary loads such as winches, lighting or refrigeration from a second bank. It also suits off-grid cabins and small solar setups with two banks needing automatic parallel charging.\u003c\/p\u003e\u003ch2\u003eInstallation notes\u003c\/h2\u003e\u003cp\u003eFitting should be done by a qualified auto-electrician or marine electrician. Cable sizing to and from the unit needs to handle at least 120A, with fuses fitted close to each battery terminal. This combiner is built for lead-acid, AGM and gel batteries; check compatibility before using it with a lithium (LiFePO4) bank, as a Cyrix-Li variant may be needed instead.\u003c\/p\u003e\u003ch2\u003eWhat's in the box\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e1 x Victron Cyrix-ct 12\/24V 120A intelligent battery combiner\u003c\/li\u003e\u003c\/ul\u003e","brand":"Victron Energy","offers":[{"title":"Default Title","offer_id":52061012984096,"sku":"CYR010120011","price":40.71,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1010\/8148\/1504\/files\/ledandsolar-cyr010120011-1.webp?v=1785508956"},{"product_id":"victron-cyrix-li-charge-230a-relay","title":"Victron Cyrix-Li-charge 12\/24V-230A Intelligent Charge Relay | CYR010230430","description":"\u003cp\u003eThe Cyrix-Li-charge 12\/24V-230A is a microprocessor-controlled charge relay from Victron Energy that combines a lithium (LiFePO4) service battery with a lead-acid starter battery in 12V or 24V systems. It lets an alternator or charger feed both banks at once, while keeping the lithium battery protected from unsafe charging conditions. It suits marine, vehicle and off-grid setups pairing a lithium service bank with a conventional starter battery.\u003c\/p\u003e\u003ch2\u003eKey features of this battery isolator switch\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCurrent rating\u003c\/strong\u003e, 230A continuous, for 12V or 24V systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eControl\u003c\/strong\u003e, microprocessor controlled, monitors voltage on both banks and connects them only when charging conditions are safe.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBMS interface\u003c\/strong\u003e, opens immediately on a charge-disconnect signal from the lithium BMS, within milliseconds.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAuto-disconnect\u003c\/strong\u003e, opens when charging stops, so the starter battery cannot be drained by the lithium bank.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage detection\u003c\/strong\u003e, works on 12V or 24V without manual configuration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e, 0.3 kg.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eHow it works\u003c\/h2\u003e\u003cp\u003eThe relay sits between the lithium service battery and the starter battery. When the alternator or an external charger raises voltage on the starter battery side above the connection threshold, the relay closes and charge current flows into the lithium bank too. When charging stops and voltage drops, the relay opens again, isolating the two banks so the lithium battery cannot back-feed the starter battery.\u003c\/p\u003e\u003cp\u003eUnlike a standard Cyrix-ct relay, this unit takes a direct input from the lithium BMS. If the BMS signals an overvoltage or temperature fault and calls for a charge stop, the relay opens within milliseconds regardless of bus voltage. This BMS connection is a required part of a safe lithium installation, not an optional extra. At 230A the relay handles the output of most marine and vehicle alternators without derating.\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMarine vessels with a lithium service bank and a separate lead-acid start battery charged from the alternator.\u003c\/li\u003e\n\u003cli\u003eMotorhomes and campervans running a lithium leisure battery alongside the vehicle starter battery.\u003c\/li\u003e\n\u003cli\u003eOff-grid and expedition vehicles where alternator charging feeds a lithium house bank.\u003c\/li\u003e\n\u003cli\u003eAny 12V or 24V dual-battery setup needing automatic, safe charge sharing between lithium and lead-acid banks.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhat's in the box\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e1x Victron Cyrix-Li-charge 12\/24V-230A intelligent charge relay\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eInstallation notes\u003c\/h2\u003e\u003cp\u003eFit by a qualified electrician or experienced marine\/vehicle installer. The BMS charge-disconnect output must be wired to the Cyrix-Li-charge control input for correct and safe lithium operation. Leaving this connection out removes the main protection for the lithium battery.\u003c\/p\u003e","brand":"Victron Energy","offers":[{"title":"Default Title","offer_id":52061013999904,"sku":"CYR010230430","price":124.29,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1010\/8148\/1504\/files\/ledandsolar-cyr010230430-1.webp?v=1785509109"},{"product_id":"bcd-802-battery-combiner-diode-80a","title":"Victron BCD 802 Diode Battery Combiner 2 Bank 80A | BCD000802000","description":"\u003cp\u003eThe Victron BCD 802 is a diode-based battery combiner that charges two separate battery banks from a single charging source, without letting one bank discharge into the other. It suits marine, vehicle and off-grid setups where a starter battery needs to stay isolated from a service or leisure bank.\u003c\/p\u003e\u003ch2\u003eKey features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBattery combiner\u003c\/strong\u003e, combines two battery banks from one charging source using Schottky diodes, blocking reverse current flow between them.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCurrent rating\u003c\/strong\u003e, 80A continuous, covering most alternator and charger outputs on 12V and 24V systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo outputs\u003c\/strong\u003e, keeps starter and leisure or service batteries electrically isolated during discharge.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e, 0.49 kg, compact enough for engine bays and vehicle battery compartments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePassive design\u003c\/strong\u003e, no moving parts, no relays and no control electronics, so there's nothing to maintain.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eHow it works\u003c\/h2\u003e\u003cp\u003eCurrent flows from the charging source to both battery banks at the same time, while the diodes stop current flowing back from one bank into the other. A flat service battery can't drain the starter battery, and the reverse holds true too. Schottky diodes are used here rather than standard silicon ones, giving a lower forward voltage drop and less heat generated during charging. That voltage drop, typically 0.3V to 0.6V for Schottky types, needs to be factored into the charging voltage set at the source, especially with lithium batteries where the charge voltage tolerance is tight.\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cp\u003eMarine installations needing isolation between an engine start battery and a domestic bank. Motorhomes and campervans running a split-charge arrangement between the vehicle starter and leisure batteries. Light commercial vehicles with auxiliary banks for refrigeration or equipment. Off-grid cabins or vehicles where one solar charge controller or alternator feeds two separate banks, and backup systems where two banks need to discharge independently from a single charger.\u003c\/p\u003e\u003ch2\u003eInstallation notes\u003c\/h2\u003e\u003cp\u003eMount the BCD 802 somewhere well ventilated, since the diodes generate heat under load, and make sure the mounting surface can dissipate that heat at sustained high currents. Wiring on each output should be rated for the maximum current and protected with a correctly sized fuse. Because of the diode voltage drop, the charging source voltage may need a slight increase to compensate, particularly with AGM or lithium chemistries. Fitting should be carried out by a qualified auto-electrician or marine electrician who understands multi-battery systems.\u003c\/p\u003e\u003ch2\u003eWhat's in the box\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e1 x Victron BCD 802 diode battery combiner\u003c\/li\u003e\u003c\/ul\u003e","brand":"Victron Energy","offers":[{"title":"Default Title","offer_id":52061014753568,"sku":"BCD000802000","price":35.16,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1010\/8148\/1504\/files\/ledandsolar-bcd000802000-1.webp?v=1785509220"},{"product_id":"cyrix-li-charge-120a-relay","title":"Victron Cyrix-Li-charge 12\/24V-120A Charge Relay | CYR010120430","description":"\u003cp\u003eThe Cyrix-Li-charge 12\/24V-120A is a microprocessor-controlled charge relay from Victron Energy that combines a lithium (LiFePO4) service battery with a lead-acid starter battery in 12V or 24V systems. It lets an alternator or charger top up both banks at once while keeping the lithium battery protected from unsafe charging conditions.\u003c\/p\u003e\u003ch2\u003eVictron split charge relay for lithium and lead-acid banks\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eContinuous current\u003c\/strong\u003e, rated at 120A.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage handling\u003c\/strong\u003e, works on 12V or 24V systems without configuration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnect voltage\u003c\/strong\u003e, closes at approximately 13.2V on a 12V system or 26.4V on a 24V system, once the starter battery shows charging is underway.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBMS integration\u003c\/strong\u003e, compatible with the Victron BMS charge disconnect output, so the relay opens immediately if the BMS signals a charge disconnect.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e, 0.12 kg.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eHow it works\u003c\/h2\u003e\u003cp\u003eUnlike a standard battery combiner, which closes whenever either battery reaches a set voltage, the Cyrix-Li-charge treats the lithium side as passive. The relay only closes when starter battery voltage rises, showing that charging is actually taking place. This stops the lithium bank feeding back into the starter battery when the engine is off. When a Victron lithium battery's BMS sends a charge disconnect signal, perhaps because the battery is full or a cell imbalance has been detected, the relay opens straight away and isolates the lithium bank from the charging source.\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cp\u003eFits motorhomes and campervans running a lithium leisure battery alongside a vehicle starter battery, narrowboats and canal boats with a lithium service bank next to a lead-acid engine start battery, and marine or off-grid vehicle builds where alternator charging feeds a lithium system. It suits any dual-battery installation where a Victron lithium BMS needs to interrupt the charge circuit.\u003c\/p\u003e\u003ch2\u003eWhat's in the box\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e1x Victron Cyrix-Li-charge 12\/24V-120A intelligent charge relay\u003c\/li\u003e\u003c\/ul\u003e","brand":"Victron Energy","offers":[{"title":"Default Title","offer_id":52061014851872,"sku":"CYR010120430","price":56.86,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1010\/8148\/1504\/files\/ledandsolar-cyr010120430-1.webp?v=1785509233"},{"product_id":"argodiode-80-2sc-battery-isolator","title":"Victron Argodiode 80-2SC Dual Battery Isolator 80A | ARG080202000R","description":"\u003cp\u003eThe Victron Argodiode 80-2SC is a diode-based battery isolator rated at 80A that charges two separate battery banks from a single alternator or charger. Current passes freely from the input to each output but cannot flow back between the batteries, so a starter bank and a leisure or auxiliary bank stay isolated from each other.\u003c\/p\u003e\u003ch2\u003eKey features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCurrent rating\u003c\/strong\u003e, 80A continuous, supporting two battery banks from one input.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiode isolation\u003c\/strong\u003e, prevents reverse current flow so one bank cannot discharge into the other.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo outputs\u003c\/strong\u003e, charges two independent batteries simultaneously from a single source.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSolid-state build\u003c\/strong\u003e, no moving parts or mechanical contacts to wear or corrode.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e, 0.606 kg, practical for engine bays and battery compartments.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eHow it works\u003c\/h2\u003e\u003cp\u003eThe Argodiode 80-2SC uses Schottky diodes, which have a lower forward voltage drop than standard silicon diodes. That keeps the voltage loss between input and output smaller, so each battery receives a charge voltage closer to what the alternator or charger actually produces. The alternator or charger connects to the single input terminal; each battery bank connects to its own output terminal. No relays, control wiring or battery management logic are needed, which keeps the installation simple.\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cp\u003eUsed in dual-battery systems in campervans, motorhomes and commercial vehicles, where a starter battery and leisure battery need independent charging. Also suited to marine installations isolating engine start and house banks, off-grid cabins with two battery banks on one charger or solar charge controller, and auxiliary battery setups on agricultural or plant machinery.\u003c\/p\u003e\u003ch2\u003eInstallation notes\u003c\/h2\u003e\u003cp\u003eMount the unit somewhere well ventilated, as the diodes generate heat under load. Cables on the input and output sides should be rated for 80A continuous current, with appropriate fusing on the input. If the charger or alternator has a voltage sensing line, connect it to a battery output terminal rather than the input to compensate for the diode voltage drop. Fitting should be carried out by a qualified auto-electrician or marine electrician familiar with dual-battery wiring.\u003c\/p\u003e\u003ch2\u003eWhat's in the box\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e1 x Victron Argodiode 80-2SC battery isolator\u003c\/li\u003e\u003c\/ul\u003e","brand":"Victron Energy","offers":[{"title":"Default Title","offer_id":52061065117984,"sku":"ARG080202000R","price":30.16,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1010\/8148\/1504\/files\/ledandsolar-arg080202000r-1.webp?v=1785510529"},{"product_id":"victron-cyrix-ct-battery-combiner-230a","title":"Victron Cyrix-ct 12\/24V 230A Battery Combiner | CYR010230010","description":"\u003cp\u003eThe Victron Cyrix-ct is a microprocessor-controlled battery combiner for 12V and 24V systems carrying up to 230A continuous current. It joins battery banks in parallel while a charging source is active and separates them again once charging stops, so a starter battery cannot be drained by auxiliary loads. It suits marine, vehicle and off-grid setups where two battery banks need managing without a manual switch.\u003c\/p\u003e\u003ch2\u003eKey features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomatic combining\u003c\/strong\u003e, the relay closes and opens based on voltage thresholds, with no manual switching needed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCurrent rating\u003c\/strong\u003e, 230A continuous at 12V or 24V DC.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStarter protection\u003c\/strong\u003e, disconnects the auxiliary bank once system voltage drops below the set threshold.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChemistry compatible\u003c\/strong\u003e, works with lead-acid, AGM, gel and lithium batteries as it responds to voltage rather than chemistry.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact build\u003c\/strong\u003e, weighs 0.3kg for installation in tight spaces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCharger compatible\u003c\/strong\u003e, works alongside alternators, solar chargers and shore power chargers without extra configuration.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eHow it works\u003c\/h2\u003e\u003cp\u003eThe Cyrix-ct monitors the voltage of both battery banks. When either reaches a pre-set charge voltage, the internal relay closes and the banks are connected in parallel so both receive charge current. When voltage falls back below the threshold, the relay opens and the banks separate again, stopping a discharged auxiliary bank from pulling down the starter battery.\u003c\/p\u003e\u003cp\u003eThe\u003c\/p\u003e","brand":"Victron Energy","offers":[{"title":"Default Title","offer_id":52061066068256,"sku":"CYR010230010","price":102.89,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1010\/8148\/1504\/files\/ledandsolar-cyr010230010-1.webp?v=1785510696"},{"product_id":"argodiode-160-2ac-isolator","title":"Victron Argodiode 160-2AC Battery Isolator 160A | ARG160201020","description":"\u003cp\u003eThe Victron Argodiode 160-2AC is a diode-based battery isolator that charges two separate battery banks from a single alternator or charger, without letting current flow between them. It suits marine, vehicle and off-grid systems where the starter battery needs protecting from the service or leisure bank.\u003c\/p\u003e\u003ch2\u003eKey features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCurrent rating\u003c\/strong\u003e, 160A continuous, for high-demand charging from a single alternator input.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo outputs\u003c\/strong\u003e, charges two independent battery banks at once from one source.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiode isolation\u003c\/strong\u003e, blocks reverse current flow so a discharged bank cannot drain its neighbour.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2AC configuration\u003c\/strong\u003e, two alternator\/charger inputs and two battery outputs in one unit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConstruction\u003c\/strong\u003e, aluminium heatsink body to dissipate heat from the diode voltage drop.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e, 1.1 kg.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eHow it works\u003c\/h2\u003e\u003cp\u003eCurrent flows from the alternator or charger through the diodes to both battery banks while the source is active. Once the source switches off, the diodes block reverse flow, keeping the starter battery isolated from the demands of the service bank. Diode isolators have an inherent forward voltage drop, typically 0.5V to 0.7V, so the voltage reaching the batteries is slightly lower than the source voltage. On systems with a Victron alternator regulator or a smart charger, this can be compensated by raising the charge voltage setpoint.\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMarine vessels with separate starter and service battery banks on one alternator.\u003c\/li\u003e\n\u003cli\u003eCampervans and motorhomes isolating the vehicle starter battery from a leisure bank.\u003c\/li\u003e\n\u003cli\u003eOff-grid cabins or vehicles charging two banks from a single source.\u003c\/li\u003e\n\u003cli\u003eCommercial vehicles with auxiliary power needing starter battery protection.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhat's in the box\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e1 x Victron Argodiode 160-2AC battery isolator\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eInstallation notes\u003c\/h2\u003e\u003cp\u003eFit this by a qualified electrician or experienced marine\/vehicle electrical engineer. Mount the unit to a surface that allows heat to dissipate, use cabling rated for the full 160A load, and fit appropriate fusing on input and output lines. Allow for the diode voltage drop when setting the charge voltage on the source device. Not intended for grid-connected use.\u003c\/p\u003e","brand":"Victron Energy","offers":[{"title":"Default Title","offer_id":52061066133792,"sku":"ARG160201020","price":69.05,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1010\/8148\/1504\/files\/ledandsolar-arg160201020-1.webp?v=1785510711"},{"product_id":"victron-argodiode-battery-isolator-120a","title":"Victron Argodiode 120-2AC Battery Isolator 120A 2 Batteries | ARG120201020R","description":"\u003cp\u003eThe Victron Argodiode 120-2AC is a diode-based battery isolator that charges two separate battery banks at once from a single alternator or charger, without letting current pass between them. It suits marine, vehicle and off-grid systems where keeping battery banks apart matters.\u003c\/p\u003e\u003ch2\u003eKey features of this victron argodiode battery isolator\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCurrent rating\u003c\/strong\u003e, 120A continuous, supporting charging from a single alternator source.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo outputs\u003c\/strong\u003e, simultaneous, isolated charging of two independent battery banks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiode isolation\u003c\/strong\u003e, prevents one battery bank discharging into another, protecting starter and service batteries from cross-drain.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2AC configuration\u003c\/strong\u003e, two Schottky diode pairs with a common anode input, reducing voltage drop compared with standard silicon diodes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAluminium heatsink body\u003c\/strong\u003e, dissipates heat without needing active cooling.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem voltage\u003c\/strong\u003e, compatible with 12V and 24V setups.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eHow it works\u003c\/h2\u003e\u003cp\u003eSchottky diodes give a lower forward voltage drop than conventional silicon diodes, typically 0.3V to 0.5V less. That means each battery bank receives voltage closer to what the alternator or charger actually outputs, which matters when charging lead-acid or AGM batteries that need accurate voltage regulation.\u003c\/p\u003e\u003cp\u003eA single input from the alternator or DC charger splits across two separate diode paths to the two banks. Because the diodes only pass current one way, neither battery can discharge into the other, and a fault or deep discharge on one bank leaves the other unaffected. The aluminium body acts as the heatsink, so it should be mounted to a flat metal surface or bulkhead for adequate cooling at sustained high currents.\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cp\u003eFits marine vessels separating starter and domestic banks from one alternator, motorhomes and campervans with separate engine and leisure batteries, commercial vehicles running auxiliary loads such as refrigeration or tail lifts, off-grid setups with one charger feeding two banks, and 4x4 or overland vehicles with dual battery arrangements.\u003c\/p\u003e\u003ch2\u003eInstallation notes\u003c\/h2\u003e\u003cp\u003eMount on a thermally conductive metal surface for heat dissipation at full rated current. Cable connections must be rated for 120A, with appropriate fusing on the input and each output circuit. Account for the diode voltage drop when setting alternator or charger output voltage, and have installation carried out by a qualified electrician familiar with marine or vehicle wiring standards.\u003c\/p\u003e\u003ch2\u003eWhat's in the box\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e1 x Victron Argodiode 120-2AC battery isolator unit\u003c\/li\u003e\u003c\/ul\u003e","brand":"Victron Energy","offers":[{"title":"Default Title","offer_id":52095393300768,"sku":"ARG120201020R","price":57.19,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1010\/8148\/1504\/files\/ledandsolar-arg120201020r-1.webp?v=1785748210"},{"product_id":"victron-argofet-200-3-battery-isolator","title":"Victron Argofet 200-3 FET Battery Isolator 200A | ARG200301020R","description":"\u003cp\u003eThe Victron Argofet 200-3 is a MOSFET-based battery isolator that charges three separate battery banks from a single alternator or charger at up to 200A continuous current, without the voltage drop penalty of a diode isolator.\u003c\/p\u003e\u003ch2\u003eKey features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBattery isolator switch\u003c\/strong\u003e for three independent battery banks from one input source, rated at 200A continuous.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMOSFET technology\u003c\/strong\u003e removes the 0.6V to 0.7V drop typical of diode isolators, so batteries receive the full charge voltage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage sensing\u003c\/strong\u003e feeds actual battery voltage back to the alternator regulator, preventing undercharging.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAluminium heatsink body\u003c\/strong\u003e dissipates heat with no fan or active cooling.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull output isolation\u003c\/strong\u003e stops one battery bank discharging into another when the input source is disconnected.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible voltages\u003c\/strong\u003e: 12V, 24V and 48V systems. Weight 1.37 kg.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eHow it works\u003c\/h2\u003e\u003cp\u003eDiode isolators drop roughly 0.6V to 0.7V on every output, which leaves batteries chronically undercharged unless the regulator is adjusted manually. The Argofet uses MOSFETs in place of diodes, so the drop in conduction is negligible and the full alternator or charger voltage reaches each bank.\u003c\/p\u003e\u003cp\u003eA dedicated sensing wire carries true battery voltage back to the alternator regulator, correcting for the difference between alternator output and battery terminal voltage. This keeps charge termination accurate without extra wiring changes elsewhere in the circuit.\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cp\u003eFits marine vessels with separate starter, domestic and bow thruster banks; motorhomes and campervans isolating a starter battery from leisure batteries; commercial vehicles running auxiliary equipment such as refrigeration or tail lifts; and off-grid setups where one alternator or DC charger feeds multiple banks. Also used as a retrofit replacement where a diode isolator has caused persistent undercharging.\u003c\/p\u003e\u003ch3\u003eInstallation notes\u003c\/h3\u003e\u003cp\u003eFit by a qualified electrician familiar with high-current DC systems, mounted on a flat metal surface for heat dissipation. Connect the sensing wire to the alternator regulator per the Victron installation guide, and use cabling and fusing rated for the full 200A load.\u003c\/p\u003e\u003ch2\u003eWhat's in the box\u003c\/h2\u003e\u003cul\u003e\u003cli\u003eVictron Argofet 200-3 FET battery isolator unit\u003c\/li\u003e\u003c\/ul\u003e","brand":"Victron Energy","offers":[{"title":"Default Title","offer_id":52095396249888,"sku":"ARG200301020R","price":104.87,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1010\/8148\/1504\/files\/ledandsolar-arg200301020r-1.webp?v=1785748574"},{"product_id":"cyrix-li-ct-battery-combiner-120a","title":"Victron Cyrix-Li-ct 12\/24V-120A Li-ion Battery Combiner | CYR010120412","description":"\u003cp\u003eThe Victron Cyrix-Li-ct is a microprocessor-controlled battery combiner built for lithium-ion battery systems running at 12V or 24V. It takes the place of a conventional VSR in setups where a Li-ion battery works alongside a starter or auxiliary lead-acid battery. Rather than switching on voltage alone, it is controlled directly by the battery management system, so it only connects the batteries when the BMS allows it.\u003c\/p\u003e\u003ch2\u003eWhy not a standard VSR\u003c\/h2\u003e\u003cp\u003eA voltage-sensitive relay connects batteries purely on measured voltage. That works fine for lead-acid, but a lithium battery can sit at a high voltage while still being unsafe to charge further. The Cyrix-Li-ct instead reads the BMS charge-disconnect or load-disconnect signal directly. When the BMS calls for charging to stop, the unit opens immediately and isolates the Li-ion bank from the alternator or charger, whatever the voltage happens to read.\u003c\/p\u003e\u003ch2\u003eKey features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eContinuous current rating\u003c\/strong\u003e, 120A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem voltage\u003c\/strong\u003e, 12V or 24V, one unit covers both\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eControl input\u003c\/strong\u003e, BMS charge-disconnect or load-disconnect signal, not voltage detection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e, 0.12 kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLogic\u003c\/strong\u003e, microprocessor-controlled response to BMS commands\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatibility\u003c\/strong\u003e, works with Victron BMS units and compatible third-party BMS outputs\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cp\u003eCommon uses include marine installations combining a Li-ion house bank with a lead-acid starter battery, motorhomes and campervans with a lithium leisure battery charged from the vehicle alternator, and commercial vehicles or off-grid systems needing controlled split-charging between Li-ion and lead-acid banks.\u003c\/p\u003e\u003ch3\u003eInstallation notes\u003c\/h3\u003e\u003cp\u003eA compatible BMS charge-disconnect or load-disconnect output is required; the Cyrix-Li-ct will not work as a standalone voltage-sensing relay. Cabling must be rated for the full 120A continuous load, with appropriate fusing on both battery connections. Installation should be carried out by someone familiar with lithium battery systems.\u003c\/p\u003e\u003ch2\u003eWhat's in the box\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e1 x Cyrix-Li-ct 12\/24V-120A battery combiner unit\u003c\/li\u003e\u003c\/ul\u003e","brand":"Victron Energy","offers":[{"title":"Default Title","offer_id":52095396413728,"sku":"CYR010120412","price":62.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1010\/8148\/1504\/files\/ledandsolar-cyr010120412-1.webp?v=1785748587"},{"product_id":"argodiode-80-2sc-dual-battery-isolator","title":"Victron Argodiode 80-2SC Battery Isolator 80A 2 Batteries | ARG080202000","description":"\u003cp\u003eThe Victron Argodiode 80-2SC is a diode-based battery isolator that charges two separate battery banks at once from a single alternator or charger, without letting current pass between them. It suits marine, vehicle and off-grid setups where the battery banks need to stay isolated from each other.\u003c\/p\u003e\u003ch2\u003eKey features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eIsolates two independent battery banks while charging both from one source at the same time\u003c\/li\u003e\n\u003cli\u003e80A continuous current rating\u003c\/li\u003e\n\u003cli\u003eSchottky diode construction gives a lower forward voltage drop than standard silicon diodes, reducing charging losses\u003c\/li\u003e\n\u003cli\u003eCompact and lightweight at 0.5 kg with bolt-on fitting\u003c\/li\u003e\n\u003cli\u003eStops one battery bank feeding back into another, so starter and auxiliary batteries stay protected independently\u003c\/li\u003e\n\u003cli\u003eNo moving parts or relay contacts\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eProduct overview\u003c\/h2\u003e\u003cp\u003eThe Argodiode 80-2SC uses Schottky diodes rather than conventional silicon diodes. Schottky diodes drop less voltage across them during charging, so the connected battery banks receive a more complete charge. That matters most in 12V systems, where small voltage losses affect the final state of charge.\u003c\/p\u003e\u003cp\u003eThe\u003c\/p\u003e","brand":"Victron Energy","offers":[{"title":"Default Title","offer_id":52095396905248,"sku":"ARG080202000","price":30.44,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1010\/8148\/1504\/files\/ledandsolar-arg080202000-1.webp?v=1785748644"},{"product_id":"victron-argofet-200-2-isolator","title":"Victron Argofet 200-2 FET Battery Isolator 200A | ARG200201020R","description":"\u003cp\u003eThe Victron Argofet 200-2 is a FET-based battery isolator switch that charges two separate battery banks from a single alternator or charger, with no voltage drop across the unit. It suits marine, vehicle and off-grid systems where independent battery banks need to stay isolated from each other during discharge while sharing one charging source.\u003c\/p\u003e\u003ch2\u003eKey features of this battery isolator switch\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eContinuous current\u003c\/strong\u003e, 200A rating for high-capacity alternators and charging systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFET technology\u003c\/strong\u003e, removes the 0.6V to 0.7V drop found on diode-based isolators, so batteries receive the full charge voltage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual output\u003c\/strong\u003e, charges two independent battery banks from one input with no cross-discharge between them.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow power loss\u003c\/strong\u003e, less heat generated compared with diode isolators.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHousing\u003c\/strong\u003e, aluminium casing suited to engine bays and confined spaces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatibility\u003c\/strong\u003e, works with standard alternators and battery chargers, no modification needed to the charging source.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eHow it works\u003c\/h2\u003e\u003cp\u003eDiode-based isolators typically drop around 0.6V to 0.7V between the charging source and the battery, which leaves batteries chronically undercharged. The Argofet 200-2 uses MOSFET technology instead, so the voltage at each battery terminal matches the alternator or charger output directly. Current flows freely to each bank during charging while reverse current between the two banks is blocked, so a discharged starter battery cannot drain the leisure bank, or vice versa.\u003c\/p\u003e\u003cp\u003eIt's a passive device. No external control wiring is needed in most standard installations, and it responds automatically to charging voltage.\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMarine vessels with separate starter and domestic battery banks charged from one alternator.\u003c\/li\u003e\n\u003cli\u003eMotorhomes and campervans needing isolation between the starter battery and habitation bank.\u003c\/li\u003e\n\u003cli\u003eOff-grid vehicles and 4x4 expedition builds with dual battery setups.\u003c\/li\u003e\n\u003cli\u003eCommercial vehicles keeping auxiliary equipment batteries independent from the engine start battery.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhat's in the box\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e1 x Victron Argofet 200-2 FET battery isolator\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eInstallation notes\u003c\/h2\u003e\u003cp\u003eFit this with a qualified electrician or experienced marine or vehicle electrical installer. Connections must be rated for 200A continuous current, with fusing on the input cable as close to the source as practicable. Mount in a ventilated location away from water ingress; airflow around the unit is still recommended even though heat output is lower than a diode isolator. Check compatibility with your alternator output and battery chemistry before fitting.\u003c\/p\u003e","brand":"Victron Energy","offers":[{"title":"Default Title","offer_id":52095397265696,"sku":"ARG200201020R","price":91.28,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1010\/8148\/1504\/files\/ledandsolar-arg200201020r-1.webp?v=1785748718"},{"product_id":"victron-battery-combiner-12-24v-230a","title":"Victron Cyrix-Li-ct 12\/24V-230A Battery Combiner | CYR010230412","description":"\u003cp\u003eThe Victron Cyrix-Li-ct is a microprocessor-controlled battery combiner built for 12V and 24V lithium-ion battery systems. It replaces a standard voltage-sensitive relay in dual-battery setups where a lithium service bank sits alongside a lead-acid or AGM starter battery, letting the two share charge without exposing either to damage.\u003c\/p\u003e\u003ch2\u003eKey features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eContinuous current\u003c\/strong\u003e, rated at 230A.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem voltage\u003c\/strong\u003e, works on 12V and 24V installations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBMS control input\u003c\/strong\u003e, charge\/discharge control terminals accept a signal from a compatible Li-ion BMS.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e, 0.3 kg.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStarter protection\u003c\/strong\u003e, stops the lithium bank from drawing down the starter battery.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eHow it works\u003c\/h2\u003e\u003cp\u003eA conventional VSR connects batteries once it sees a threshold voltage, with no regard for battery condition. The Cyrix-Li-ct instead takes its cue from the BMS. When the BMS output signals a fault, such as over-voltage or over-temperature, the combiner opens and isolates the lithium bank from the rest of the circuit. The ct designation refers to these charge\/discharge control terminals: they let the unit act on battery state rather than voltage alone, which matters with lithium chemistries that hold a flat voltage curve right up to the point of trouble.\u003c\/p\u003e\u003cp\u003eBecause it covers both 12V and 24V, one unit serves either voltage, useful for installers who would otherwise stock two separate combiners.\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cp\u003eFits marine vessels running a lithium service bank next to a lead-acid or AGM starter battery, and campervans, motorhomes or HGVs pairing lithium leisure batteries with a vehicle starter battery. Also suited to off-grid vehicles where an alternator charges a Li-ion bank.\u003c\/p\u003e\u003ch2\u003eInstallation notes\u003c\/h2\u003e\u003cp\u003eFit this by a qualified electrician or marine\/vehicle electrical engineer. The Cyrix-Li-ct needs to be wired to the charge\/discharge control output of a compatible Li-ion BMS for its protection function to work; without that signal, the isolation feature will not operate. Cable and fusing on both battery connections should be rated for the 230A continuous load, and marine installs should follow the wiring standard for the vessel class.\u003c\/p\u003e\u003ch2\u003eWhat's in the box\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e1 x Victron Cyrix-Li-ct 12\/24V-230A battery combiner\u003c\/li\u003e\u003c\/ul\u003e","brand":"Victron Energy","offers":[{"title":"Default Title","offer_id":52095397593376,"sku":"CYR010230412","price":138.45,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1010\/8148\/1504\/files\/ledandsolar-cyr010230412-1.webp?v=1785748744"},{"product_id":"cyrix-ct-120a-battery-combiner","title":"Victron Cyrix-ct 12\/24V-120A Battery Combiner Kit | CYR010120110R","description":"\u003cp\u003eThe Victron Cyrix-ct is a microprocessor-controlled battery combiner for 12V and 24V dual-battery systems. It joins two battery banks in parallel while charging voltage is present, then separates them once charging stops, protecting a starter battery from being drained by a leisure or service bank. This retail kit (CYR010120110R) is rated at 120A continuous current.\u003c\/p\u003e\u003ch2\u003eKey features of the Cyrix-ct battery combiner\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMicroprocessor-controlled relay connects batteries when charge voltage is detected and disconnects them when it drops\u003c\/li\u003e\n\u003cli\u003eAutomatic voltage detection works across both 12V and 24V systems without manual setup\u003c\/li\u003e\n\u003cli\u003e120A continuous current rating\u003c\/li\u003e\n\u003cli\u003eIgnition input terminal (the \"ct\" designation) lets the combiner join batteries whenever the engine is running, regardless of alternator output\u003c\/li\u003e\n\u003cli\u003eSolid-state relay with no moving parts\u003c\/li\u003e\n\u003cli\u003eNo voltage drop across the combiner when closed, so both batteries receive full charge voltage\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eHow it works\u003c\/h2\u003e\u003cp\u003eThe unit monitors voltage across the two battery banks. When the alternator or charger raises voltage above the combine threshold, the internal relay closes and both banks charge together. When voltage drops below the disconnect threshold, the relay opens and the banks separate again. Built-in time delays stop the relay switching on and off during brief voltage fluctuations.\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cp\u003eThe Cyrix-ct suits motorhomes and campervans with a starter and leisure battery, marine vessels needing isolation between an engine start battery and a domestic bank, commercial vehicles running auxiliary equipment such as refrigeration or tail lifts, and off-grid vehicle builds. It is an alternative to diode-based isolators in installations where their voltage drop is a problem.\u003c\/p\u003e\u003ch2\u003eWhat's in the box\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eVictron Cyrix-ct 12\/24V 120A battery combiner unit\u003c\/li\u003e\n\u003cli\u003eMounting hardware and installation accessories (retail kit)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation notes\u003c\/h2\u003e\u003cp\u003eFit this with correct cable sizing and fusing at each battery terminal given the 120A rating. The ignition input wire needs a switched live that is only active with the engine running. Mount the unit somewhere dry and ventilated, away from fuel lines and heat sources. Weight is 0.9 kg.\u003c\/p\u003e","brand":"Victron Energy","offers":[{"title":"Default Title","offer_id":52095397724448,"sku":"CYR010120110R","price":83.46,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1010\/8148\/1504\/files\/ledandsolar-cyr010120110r-1.webp?v=1785748773"},{"product_id":"victron-argodiode-140a-3-battery-isolator","title":"Victron Argodiode 140-3AC Battery Isolator 140A 3 Batteries | ARG140301020R","description":"\u003cp\u003eThe Victron Argodiode 140-3AC is a diode-based battery isolator built for 12V, 24V and 48V systems where a single alternator needs to charge up to three independent battery banks at once. It suits marine, vehicle and off-grid setups where stopping one bank discharging into another is essential.\u003c\/p\u003e\u003ch2\u003eKey features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRated current\u003c\/strong\u003e, 140A continuous, for high-demand charging systems with large alternators.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThree battery outputs\u003c\/strong\u003e, one alternator input can charge up to three separate banks with full electrical isolation between them.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiode isolation\u003c\/strong\u003e, prevents any bank discharging into another regardless of state of charge differences.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem voltage\u003c\/strong\u003e, compatible with 12V, 24V and 48V DC systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConstruction\u003c\/strong\u003e, aluminium heat sink body with busbar-style connections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e, 1kg, supplied in retail packaging.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eHow it works\u003c\/h2\u003e\u003cp\u003eSchottky diodes split the alternator output between the three battery banks without any electronic switching or control wiring. Current flows from the alternator input to each output independently, so a fully charged bank cannot back-feed a depleted one. The trade-off is a voltage drop across each diode, typically 0.5V to 0.7V under load, meaning battery terminal voltage sits slightly below the alternator's output. This can be compensated by raising the regulator set point, or by configuring a Victron battery charger or MPPT controller to allow for the offset. It is worth factoring into system design for AGM or lithium banks with tighter charge voltage tolerances. The 140A rating is the total input current; how it splits across the three outputs depends on the relative state of charge and internal resistance of each battery.\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMarine vessels with separate starter, domestic and bow-thruster banks charged from one alternator.\u003c\/li\u003e\n\u003cli\u003eMotorhomes and campervans isolating the starter battery from leisure banks.\u003c\/li\u003e\n\u003cli\u003eOff-grid cabins or vehicles with alternator charging feeding multiple banks.\u003c\/li\u003e\n\u003cli\u003eCommercial vehicles keeping auxiliary banks isolated from the engine start battery.\u003c\/li\u003e\n\u003cli\u003eRetrofits replacing older split-charge relay systems with diode isolation.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation notes\u003c\/h2\u003e\u003cp\u003eFitting should be done by a qualified auto-electrician or marine electrician working with high-current DC systems. Mount the unit where airflow around the heat sink is unobstructed, since thermal performance relies on passive convection. Cabling must be rated for 140A continuous use, with correct fusing on the alternator feed. Allow for the diode voltage drop when setting alternator or regulator voltage, particularly with AGM or lithium chemistries. Marine installs should follow NMEA or RYA wiring guidance as applicable.\u003c\/p\u003e\u003ch2\u003eWhat's in the box\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e1 x Victron Argodiode 140-3AC diode battery isolator (retail packaging)\u003c\/li\u003e\u003c\/ul\u003e","brand":"Victron Energy","offers":[{"title":"Default Title","offer_id":52095397888288,"sku":"ARG140301020R","price":67.45,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1010\/8148\/1504\/files\/ledandsolar-arg140301020r-1.webp?v=1785748804"},{"product_id":"victron-cyrix-i-400a-combiner","title":"Victron Cyrix-i 24\/48V 400A Intelligent Battery Combiner | CYR020400000","description":"\u003cp\u003eThe Victron Cyrix-i 24\/48V-400A is a microprocessor-controlled battery combiner for 24V and 48V systems that need high-current parallel charging between two battery banks. It replaces diode-based isolators and voltage-sensing relays, avoiding the voltage drop and heat losses those methods create.\u003c\/p\u003e\u003ch2\u003eKey features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCurrent rating\u003c\/strong\u003e, 400A continuous, for high-demand 24V and 48V battery systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSmart control\u003c\/strong\u003e, a microprocessor monitors both battery voltages and connects the banks only when charging conditions are met, stopping unwanted discharge between them.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual voltage\u003c\/strong\u003e, works on 24V or 48V nominal systems, so one part number covers both configurations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo voltage drop\u003c\/strong\u003e, closed-relay operation avoids the 0.6V to 0.7V loss typical of diode isolators.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomatic disconnect\u003c\/strong\u003e, opens below the disconnect threshold, protecting the starter or primary bank from auxiliary loads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e, 0.9 kg, suitable for confined installation spaces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBattery compatibility\u003c\/strong\u003e, works with AGM, gel and flooded lead-acid batteries.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eHow it works\u003c\/h2\u003e\u003cp\u003eThe Cyrix-i watches the voltage on both banks continuously. When either rises above a preset threshold, showing a charger or alternator is active, the internal relay closes and the banks parallel up to charge together. Once voltage falls back below the disconnect point, the relay opens and the banks separate again.\u003c\/p\u003e\u003cp\u003eAt 400A it suits systems fed by large alternators or multi-stage chargers. Because there's no voltage drop across the unit, charger voltage settings don't need adjusting to compensate, so charging accuracy is maintained. It works alongside Victron chargers, inverter\/chargers and BatteryProtect units, but also operates independently in third-party systems.\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eSplit-charge systems on commercial vehicles, coaches and HGVs with 24V electrics.\u003c\/li\u003e\n\u003cli\u003eMarine vessels with separate starter and house battery banks at 24V or 48V.\u003c\/li\u003e\n\u003cli\u003eOff-grid installations where a generator or solar charger feeds multiple banks.\u003c\/li\u003e\n\u003cli\u003eIndustrial and telecoms backup power needing isolated banks with automatic parallel charging.\u003c\/li\u003e\n\u003cli\u003e48V electric vehicle auxiliary systems.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhat's in the box\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e1x Victron Cyrix-i 24\/48V-400A intelligent battery combiner\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eInstallation notes\u003c\/h2\u003e\u003cp\u003eFit this by a qualified electrician or marine\/vehicle electrical specialist experienced with high-current DC systems. At 400A, correct cable sizing, fusing and terminal torque matter. Mount in a ventilated spot away from flammable materials, and follow Victron's wiring guidelines along with local electrical regulations.\u003c\/p\u003e","brand":"Victron Energy","offers":[{"title":"Default Title","offer_id":52095398773024,"sku":"CYR020400000","price":221.54,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1010\/8148\/1504\/files\/ledandsolar-cyr020400000-1.webp?v=1785748895"},{"product_id":"victron-cyrix-ct-battery-combiner-230a-cyr010230010r","title":"Victron Cyrix-ct 12\/24V 230A Intelligent Battery Combiner | CYR010230010R","description":"\u003cp\u003eThe Victron Cyrix-ct is a microprocessor-controlled battery combiner built for 12V and 24V systems carrying up to 230A continuous current. It automatically links battery banks when one is being charged and separates them once charging stops, keeping the starter or primary battery protected from discharge. It suits marine, vehicle and off-grid setups where two battery banks need managing without manual switching.\u003c\/p\u003e\u003ch2\u003eKey features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem voltage\u003c\/strong\u003e, 12V and 24V DC, detected automatically with no manual configuration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCurrent rating\u003c\/strong\u003e, 230A continuous.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eControl logic\u003c\/strong\u003e, microprocessor-controlled, connecting batteries when voltage rises above a set threshold and disconnecting when it falls.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSolid-state construction\u003c\/strong\u003e, no moving parts, avoiding the mechanical wear of solenoid-based combiners.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e, 0.3 kg, suited to confined installation spaces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCharge source compatibility\u003c\/strong\u003e, works with alternators, solar charge controllers and shore power chargers, since it responds to voltage rather than source type.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eHow it works\u003c\/h2\u003e\u003cp\u003eThe Cyrix-ct monitors battery voltage continuously. When voltage on either bank reaches 13.7V on a 12V system, or 27.4V on a 24V system, the unit connects the two banks in parallel so both take charge. Once voltage falls below the disconnect threshold, the banks separate again. This stops a depleted auxiliary bank from pulling down the starter battery, a common fault in dual-battery wiring.\u003c\/p\u003e\u003cp\u003eUnlike diode-based isolators, the Cyrix-ct introduces no voltage drop between alternator and batteries, so batteries receive full charge voltage. That matters for AGM and lithium batteries, which need accurate charge voltages to reach full capacity. The ct designation refers to a common positive terminal arrangement, which fits most standard dual-battery wiring layouts.\u003c\/p\u003e\u003cp\u003eA load detection algorithm adds a short delay before connecting if a sudden load causes a voltage rise that could resemble a charging event, reducing false triggering in real installations.\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cp\u003eUsed in motorhome and campervan dual-battery systems to keep the starter battery isolated from the leisure bank, in marine installations sharing charge between engine start and house banks, in off-grid and 4x4 expedition builds, in commercial vehicle auxiliary power systems, and in solar off-grid setups pairing a starter battery with a house bank charged by a solar controller.\u003c\/p\u003e\u003ch2\u003eInstallation notes\u003c\/h2\u003e\u003cp\u003eFit by a competent electrician or auto-electrical engineer familiar with dual-battery systems. Both battery connections need correct fusing before installation, and cable sizing must suit the 230A continuous rating. The unit is not suitable for 48V systems. For lithium batteries, check that the Cyrix-ct charge voltage thresholds match the battery management system before wiring it in.\u003c\/p\u003e\u003ch2\u003eWhat's in the box\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e1 x Victron Cyrix-ct 12\/24V 230A intelligent battery combiner\u003c\/li\u003e\u003c\/ul\u003e","brand":"Victron Energy","offers":[{"title":"Default Title","offer_id":52095398904096,"sku":"CYR010230010R","price":102.3,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1010\/8148\/1504\/files\/ledandsolar-cyr010230010r-1.webp?v=1785748920"},{"product_id":"argodiode-100-3ac-battery-isolator-100a","title":"Victron Argodiode 100-3AC Battery Isolator 100A 3 Banks | ARG100301000R","description":"\u003cp\u003eThe Victron Argodiode 100-3AC is a diode-based battery isolator that charges up to three separate battery banks from a single alternator or charger, without letting any bank discharge into another. It suits marine, vehicle and off-grid systems where separate banks need to stay isolated from each other while sharing one charging source.\u003c\/p\u003e\u003ch2\u003eKey features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBattery isolator switch function\u003c\/strong\u003e, isolates up to three battery banks from one charging source and prevents cross-discharge between them.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCurrent rating\u003c\/strong\u003e, 100A continuous across the three outputs (3AC configuration).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiode-based isolation\u003c\/strong\u003e, no active switching or control wiring needed, so installation is straightforward.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAluminium heatsink body\u003c\/strong\u003e, dissipates heat generated by the diode voltage drop during charging.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact construction\u003c\/strong\u003e, suited to permanent fitting in vehicles, vessels and off-grid enclosures.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eHow it works\u003c\/h2\u003e\u003cp\u003eSchottky diodes split a single charging input across three battery outputs. Current flows from the charger or alternator to each bank, but the diodes block reverse flow, so a depleted bank cannot pull from a charged one. There's no control logic involved, and isolation holds regardless of load.\u003c\/p\u003e\u003cp\u003eDiode isolators introduce a voltage drop of approximately 0.5V to 0.7V. To compensate, the alternator regulator or charger output should be set 0.5V to 0.7V higher than normal. The 100A rating is the total input current, distributed across the three banks according to their state of charge. The aluminium body must be mounted where it can dissipate heat properly, especially at sustained high charge currents.\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMarine installations with separate starter, domestic and bow thruster battery banks charged from one alternator.\u003c\/li\u003e\n\u003cli\u003eMotorhomes and campervans running split habitation and engine start batteries plus an auxiliary bank.\u003c\/li\u003e\n\u003cli\u003eOff-grid cabins or vehicles with multiple battery banks serving different loads that must stay isolated.\u003c\/li\u003e\n\u003cli\u003eCommercial vehicles with auxiliary equipment needing a dedicated bank independent of the starter battery.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation notes\u003c\/h2\u003e\u003cp\u003eMount the Argodiode on a thermally conductive surface for heat dissipation. Cabling must be correctly rated for the maximum current, with appropriate fusing on the input feed. Account for the diode voltage drop when setting the charge source output voltage. Fitting should be done by a qualified electrician or marine electrical engineer familiar with multi-bank charging systems, following relevant wiring standards for the vessel.\u003c\/p\u003e\u003ch2\u003eWhat's included\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e1 x Victron Argodiode 100-3AC diode battery isolator\u003c\/li\u003e\u003c\/ul\u003e","brand":"Victron Energy","offers":[{"title":"Default Title","offer_id":52095399297312,"sku":"ARG100301000R","price":47.65,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1010\/8148\/1504\/files\/ledandsolar-arg100301000r-1.webp?v=1785748960"},{"product_id":"argodiode-180-3ac-battery-isolator","title":"Victron Argodiode 180-3AC Battery Isolator 3 Batteries 180A | ARG180301020","description":"\u003cp\u003eThe Victron Argodiode 180-3AC is a diode-based battery isolator that charges up to three separate battery banks from a single alternator or charger, without letting one bank discharge into another. It suits marine, vehicle and off-grid setups where independent battery banks need to stay isolated from each other.\u003c\/p\u003e\u003ch2\u003eKey features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBattery outputs\u003c\/strong\u003e, supports up to three independent battery banks from one charging source.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCurrent rating\u003c\/strong\u003e, 180A maximum continuous current, suited to high-output alternators and multi-bank systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiode isolation\u003c\/strong\u003e, blocks reverse current flow between battery banks so a depleted bank cannot draw down a healthy one.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3AC design\u003c\/strong\u003e, three outputs with AC-compatible input, so it works with AC chargers as well as DC alternators.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuild\u003c\/strong\u003e, aluminium construction with an integrated heat sink for passive cooling, weighing 1.4 kg.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eHow it works\u003c\/h2\u003e\u003cp\u003eDiode isolators let current flow in one direction only. While the charging source is active, current passes through the diodes to each connected battery bank. Once the source switches off, the diodes block any path between banks, so a flat bank cannot pull down a charged one.\u003c\/p\u003e\u003cp\u003eDiodes introduce a voltage drop, typically 0.5V to 0.7V, so the voltage reaching the batteries will be slightly lower than the source output. Where this matters, set the alternator or charger output voltage to compensate during commissioning.\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMarine vessels with separate starter, domestic and bow thruster battery banks.\u003c\/li\u003e\n\u003cli\u003eMotorhomes and coaches with engine start, habitation and auxiliary battery banks.\u003c\/li\u003e\n\u003cli\u003eOff-grid vehicles and expedition builds needing isolated battery management.\u003c\/li\u003e\n\u003cli\u003eCommercial vehicles with multiple electrical systems requiring independent protection.\u003c\/li\u003e\n\u003cli\u003eSplit-charge systems fed by a high-output alternator or shore power charger.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhat's in the box\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e1 x Victron Argodiode 180-3AC battery isolator unit\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eInstallation notes\u003c\/h2\u003e\u003cp\u003eFit by a qualified electrician or competent marine\/vehicle electrical engineer, in a well-ventilated spot so the heat sink can do its job. Cabling must be rated for the full 180A continuous load, with appropriate fusing on each battery connection. Allow for the diode voltage drop when setting the charging source output. Not intended for grid-connected solar PV systems and does not require G98 or G99 compliance.\u003c\/p\u003e","brand":"Victron Energy","offers":[{"title":"Default Title","offer_id":52095399362848,"sku":"ARG180301020","price":84.14,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1010\/8148\/1504\/files\/ledandsolar-arg180301020-1.webp?v=1785748968"},{"product_id":"victron-argofet-100-3-isolator","title":"Victron Argofet 100-3 Battery Isolator 100A 3 Batteries | ARG100301020R","description":"\u003cp\u003eThe Victron Argofet 100-3 is a FET-based battery isolator that charges up to three separate battery banks from a single alternator or DC charger, with no voltage drop penalty. It suits marine, vehicle and off-grid systems where independent battery banks need to stay isolated from each other while sharing one charging source.\u003c\/p\u003e\u003ch2\u003eKey features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThree outputs\u003c\/strong\u003e, charges three independent battery banks from one alternator or charger without cross-discharge between banks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFET technology\u003c\/strong\u003e, eliminates the 0.6V to 0.7V voltage drop found on diode-based isolators, so each bank gets full charge voltage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e100A rating\u003c\/strong\u003e, 100A continuous current across all three outputs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlternator excitation wire\u003c\/strong\u003e, included so the alternator field circuit is not disrupted by the isolator.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAluminium housing\u003c\/strong\u003e, compact enough for engine bays and confined spaces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBattery chemistry\u003c\/strong\u003e, compatible with lead-acid, AGM, gel and lithium (LiFePO4) batteries.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eHow it works\u003c\/h2\u003e\u003cp\u003eDiode isolators drop around 0.6V to 0.7V on every output, which leaves batteries chronically undercharged over time. The Argofet 100-3 uses MOSFET technology to bring that drop close to zero, so each bank receives the voltage the alternator or charger regulator actually set, with no changes needed to the charging source.\u003c\/p\u003e\u003cp\u003eEach of the three outputs is fully isolated from the others. A fault or deep discharge on one bank cannot pull current from another, which matters in dual-battery vehicles or multi-bank boats where the starter battery has to stay protected from auxiliary loads. The dedicated alternator excitation connection stops the FET circuitry from preventing the alternator from exciting at startup, so it integrates with standard vehicle and marine alternator systems.\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cp\u003eUsed on marine vessels with separate starter, domestic and bow thruster banks, campervans and motorhomes running a starter plus leisure batteries, commercial vehicles with isolated auxiliary systems, off-grid cabins charging multiple banks from one source, and as a retrofit for diode isolators suffering from voltage drop.\u003c\/p\u003e\u003ch2\u003eInstallation notes\u003c\/h2\u003e\u003cp\u003eFitting should be carried out by a qualified auto-electrician or marine electrician working with multi-battery DC systems. Disconnect all battery banks before wiring, connect the alternator excitation wire correctly to avoid startup issues, and fuse each output circuit for the connected battery bank and cable rating. For lithium installations, check the BMS is compatible with shared alternator charging before fitting.\u003c\/p\u003e\u003ch2\u003eWhat's in the box\u003c\/h2\u003e\u003cul\u003e\u003cli\u003eVictron Argofet 100-3 FET battery isolator unit\u003c\/li\u003e\u003c\/ul\u003e","brand":"Victron Energy","offers":[{"title":"Default Title","offer_id":52095400182048,"sku":"ARG100301020R","price":98.69,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1010\/8148\/1504\/files\/ledandsolar-arg100301020r-1.webp?v=1785749066"},{"product_id":"argofet-200-2-dual-battery-isolator","title":"Victron Argofet 200-2 Battery Isolator 200A | ARG200201020","description":"\u003cp\u003eThe Victron Argofet 200-2 is a FET-based battery isolator that charges two separate battery banks from a single alternator or charger, without the voltage drop found in traditional diode isolators. It suits marine, vehicle and off-grid systems where independent battery banks need to stay isolated from each other during discharge while still sharing one charging source.\u003c\/p\u003e\u003ch2\u003eKey features of the victron argofet 200-2\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eContinuous current\u003c\/strong\u003e, 200A rating, suited to high-capacity alternators and charging systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFET technology\u003c\/strong\u003e, removes the 0.6V to 0.7V drop typical of diode isolators, so each bank gets the full charging voltage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo output channels\u003c\/strong\u003e, charges two independent battery banks at once from one input source.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomatic operation\u003c\/strong\u003e, no manual switching needed in normal use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHousing\u003c\/strong\u003e, compact aluminium casing suited to engine bay and marine fitting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput compatibility\u003c\/strong\u003e, works with standard alternators or an external battery charger as the source.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eHow it works\u003c\/h2\u003e\u003cp\u003eDiode isolators typically drop voltage by around 0.6V to 0.7V between alternator and battery, which can leave batteries chronically undercharged. The Argofet 200-2 uses MOSFET switching to bring that drop close to zero, so each bank receives the alternator or charger's full output voltage.\u003c\/p\u003e\u003cp\u003eCurrent flows from the input to both banks while charging, but the isolator stops current passing between the two banks. A starter battery and a leisure or service battery can therefore charge together without the service bank draining the starter battery once the engine is off. The 200A rating covers larger setups with high-output alternators or multiple chargers on one system.\u003c\/p\u003e\u003cp\u003eThe unit runs without active control once wired, though an alternator excitation connection is needed for correct MOSFET switching. Because the voltage drop is near zero, installers should check the alternator's regulator setting, as it will see a more accurate battery voltage than with a diode isolator.\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMarine vessels with separate starter and service banks on one alternator.\u003c\/li\u003e\n\u003cli\u003eMotorhomes and campervans needing isolation between starter and habitation batteries.\u003c\/li\u003e\n\u003cli\u003eTrucks and commercial vehicles with auxiliary battery systems.\u003c\/li\u003e\n\u003cli\u003eOff-grid setups where one charger feeds two separate banks.\u003c\/li\u003e\n\u003cli\u003eDual-battery systems suffering undercharging from a diode isolator.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation notes\u003c\/h2\u003e\u003cp\u003eFitting should be carried out by a qualified electrician or marine electrical engineer used to high-current DC work. Mount the unit somewhere ventilated, as it generates heat under load, and use cabling and fuses rated for 200A continuous current on both input and output. The alternator excitation wire must be connected correctly for the MOSFET to switch. Do not fit inside sealed or unventilated enclosures.\u003c\/p\u003e\u003ch2\u003eWhat's in the box\u003c\/h2\u003e\u003cul\u003e\u003cli\u003eVictron Argofet 200-2 FET battery isolator unit\u003c\/li\u003e\u003c\/ul\u003e","brand":"Victron Energy","offers":[{"title":"Default Title","offer_id":52095400411424,"sku":"ARG200201020","price":101.84,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1010\/8148\/1504\/files\/ledandsolar-arg200201020-1.webp?v=1785749116"},{"product_id":"argofet-200-3-battery-isolator","title":"Victron Argofet 200-3 Battery Isolator 3 Banks 200A | ARG200301020","description":"\u003cp\u003eThe Victron Argofet 200-3 is a FET-based battery isolator that charges three separate battery banks from a single alternator or charger, with no voltage drop penalty. It suits marine, vehicle and off-grid systems where independent battery banks need to stay isolated from each other while sharing one charge source.\u003c\/p\u003e\u003ch2\u003eKey features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThree isolated outputs\u003c\/strong\u003e, charges three independent battery banks from a single input, with full isolation between banks so a fault or discharge on one cannot affect the others.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFET technology\u003c\/strong\u003e, MOSFET switching removes the 0.6V to 0.7V drop found in diode isolators, so batteries receive the full charge voltage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e200A rating\u003c\/strong\u003e, continuous current rating suited to high-capacity alternators and multi-bank systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlternator voltage sensing\u003c\/strong\u003e, compensates the alternator output so charge levels stay correct across all banks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAluminium body\u003c\/strong\u003e, includes an integrated heat sink for passive cooling, no fan required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e12V and 24V compatible\u003c\/strong\u003e, weighs 1.37 kg, straightforward to mount in an engine bay, battery compartment or distribution panel.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eHow it works\u003c\/h2\u003e\u003cp\u003eDiode-based isolators lose around 0.6V to 0.7V on every charge path, so batteries never quite reach full charge voltage over time. The Argofet 200-3 removes that drop with MOSFET switching, so each bank sees the same voltage the alternator or charger produces. Each of the three outputs stays isolated from the others: if one bank faults or discharges deeply, it cannot pull down voltage on the rest. That separation matters on a vessel or commercial vehicle where a starter battery has to stay protected from domestic or auxiliary loads.\u003c\/p\u003e\u003cp\u003eAn alternator voltage sense connection lets the regulator see actual battery voltage rather than the voltage at the alternator terminal, correcting for cable resistance on long runs.\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cp\u003eUsed on marine vessels needing separate starter, domestic and bow-thruster banks from one alternator; on HGVs, coaches and commercial vehicles with multiple auxiliary banks alongside a starter battery; in motorhomes and campervans keeping a leisure battery isolated from the vehicle starter; and in off-grid installations with one charge source feeding several battery banks.\u003c\/p\u003e\u003ch2\u003eInstallation notes\u003c\/h2\u003e\u003cp\u003eFit by a qualified electrician or marine electrical engineer familiar with high-current DC systems. Mount in a well-ventilated location on a surface able to support the unit and its cable connections. Size cabling for 200A continuous current and fuse both input and outputs. Connect the sense wire to the alternator's sense terminal per Victron's wiring documentation, and avoid enclosed spaces with no airflow around the heat sink.\u003c\/p\u003e\u003ch2\u003eWhat's in the box\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e1 x Victron Argofet 200-3 FET battery isolator\u003c\/li\u003e\u003c\/ul\u003e","brand":"Victron Energy","offers":[{"title":"Default Title","offer_id":52095400837408,"sku":"ARG200301020","price":107.15,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1010\/8148\/1504\/files\/ledandsolar-arg200301020-1.webp?v=1785749162"},{"product_id":"cyrix-li-load-24-48v-relay","title":"Victron Cyrix-Li-load 24\/48V-120A Intelligent Load Relay | CYR020120450","description":"\u003cp\u003eThe Cyrix-Li-load is a microprocessor-controlled load relay for lithium battery systems running at 24V or 48V. It disconnects non-essential loads once the battery reaches a low-voltage threshold, protecting cells from deep discharge, and is rated at 120A continuous for demanding DC load circuits.\u003c\/p\u003e\u003ch2\u003eKey features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCurrent rating\u003c\/strong\u003e, 120A continuous, suited to substantial DC load circuits at 24V or 48V.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSwitching logic\u003c\/strong\u003e, microprocessor controlled, monitors battery voltage and disconnects loads at a programmable low-voltage threshold.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBattery chemistry\u003c\/strong\u003e, designed specifically for lithium systems, where accurate low-voltage disconnect matters for cell longevity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReconnection\u003c\/strong\u003e, automatic once battery voltage recovers to the set reconnect threshold, no manual intervention needed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e, 0.12 kg, compact enough for tight battery enclosures or distribution panels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem voltage\u003c\/strong\u003e, works on 24V or 48V DC systems.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eHow it works\u003c\/h2\u003e\u003cp\u003eThe relay continuously monitors battery terminal voltage. When voltage drops to the low-voltage disconnect threshold, it opens and isolates connected loads from the battery, preventing discharge beyond safe limits. This matters most on lithium chemistries, where over-discharge can cause permanent cell damage or trigger a battery management system shutdown.\u003c\/p\u003e\u003cp\u003eUnlike a fuse or manual isolator, the Cyrix-Li-load reacts automatically to battery state. Once the battery recovers, the relay closes again and restores power to the loads, making it suited to unattended installations such as remote cabins, liveaboard vessels or vehicle auxiliary systems.\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eLow-voltage load disconnect on lithium battery off-grid systems at 24V or 48V.\u003c\/li\u003e\n\u003cli\u003eMarine auxiliary load protection on liveaboard or commercial vessels with lithium house banks.\u003c\/li\u003e\n\u003cli\u003eVehicle and motorhome auxiliary circuits needing battery protection without manual switching.\u003c\/li\u003e\n\u003cli\u003eRemote off-grid cabins and telecoms sites where unattended operation is essential.\u003c\/li\u003e\n\u003cli\u003eLoad shedding in solar storage systems to protect the battery during low charge periods.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhat's in the box\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e1 x Cyrix-Li-load 24\/48V-120A intelligent load relay\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eInstallation notes\u003c\/h2\u003e\u003cp\u003eFit this with a qualified electrician or systems integrator familiar with DC battery installations. Check the unit is rated for the total connected load current and that appropriate fusing sits on all battery connections. It's intended for lithium battery systems, so confirm compatibility with your battery management system beforehand. Marine installs should follow applicable NMEA and flag-state wiring standards.\u003c\/p\u003e","brand":"Victron Energy","offers":[{"title":"Default Title","offer_id":52095574245664,"sku":"CYR020120450","price":55.64,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1010\/8148\/1504\/files\/ledandsolar-cyr020120450-1.webp?v=1785754012"},{"product_id":"victron-cyrix-i-400a-combiner-cyr010400000","title":"Victron Cyrix-i 12\/24V 400A Intelligent Battery Combiner | CYR010400000","description":"\u003cp\u003eThe Victron Cyrix-i is a microprocessor-controlled battery combiner that connects two battery banks in parallel while both are being charged, then separates them once charging stops. It suits marine, vehicle and off-grid systems where a starter battery must stay isolated from a service battery while both charge from the same source.\u003c\/p\u003e\u003ch2\u003eKey features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCurrent rating\u003c\/strong\u003e, 400A continuous, for high-demand 12V and 24V systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSwitching logic\u003c\/strong\u003e, microprocessor-controlled, connects banks only when a charge source is detected\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperation\u003c\/strong\u003e, automatic, no manual intervention once installed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatibility\u003c\/strong\u003e, lead-acid chemistries including AGM, gel and flooded\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e, 0.9 kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage\u003c\/strong\u003e, works across 12V and 24V systems without reconfiguration\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eHow it works\u003c\/h2\u003e\u003cp\u003eThe Cyrix-i monitors the voltage of both battery banks continuously. When voltage on either bank rises above a set threshold, indicating an active charge source such as an alternator or shore power charger, the unit connects the banks so they charge together. Once voltage drops back below that threshold, the banks separate again, keeping the starter battery ready to crank the engine regardless of how far the service bank has been discharged.\u003c\/p\u003e\u003cp\u003eRather than a simple relay or diode isolator, the Cyrix-i applies time delays and hysteresis to its switching decisions. This stops rapid cycling from voltage fluctuations and avoids connecting a discharged bank to a healthy one at the wrong moment. Rated at 400A, it can carry the full output of most vehicle alternators and battery chargers without restricting the charging circuit.\u003c\/p\u003e\u003cp\u003eIt wires directly between the positive terminals of the two battery banks, needs no external control signal, and draws negligible standby current. That makes it suitable for systems that sit unused for long stretches between uses.\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cp\u003eMarine vessels with separate starter and service banks on one alternator; motorhomes and campervans needing isolation between starter and leisure batteries; commercial vehicles with auxiliary power that must not risk engine starting; off-grid cabins with two banks on one charger or solar system; agricultural and plant machinery with dual-battery setups.\u003c\/p\u003e\u003ch2\u003eInstallation notes\u003c\/h2\u003e\u003cp\u003eFitting should be done by a qualified electrician or marine electrical engineer familiar with high-current DC systems, using correctly rated cable and fusing on each bank. Both banks need a common negative before installation. The unit is not suitable for lithium chemistries unless the battery management system is confirmed compatible with voltage-based combiners.\u003c\/p\u003e\u003ch2\u003eWhat's in the box\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e1 x Victron Cyrix-i 12\/24V 400A intelligent battery combiner\u003c\/li\u003e\u003c\/ul\u003e","brand":"Victron Energy","offers":[{"title":"Default Title","offer_id":52095598592288,"sku":"CYR010400000","price":211.41,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1010\/8148\/1504\/files\/ledandsolar-cyr010400000-1.webp?v=1785754485"},{"product_id":"argofet-100-3-battery-isolator","title":"Victron Argofet 100-3 FET Battery Isolator 100A | ARG100301020","description":"\u003cp\u003eThe Victron Argofet 100-3 is a FET-based battery isolator that charges three separate battery banks from a single alternator or charger, with no voltage drop penalty. It suits marine, vehicle and off-grid installations where independent battery banks need to stay isolated from each other while sharing one charge source.\u003c\/p\u003e\u003ch2\u003eKey features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThree outputs\u003c\/strong\u003e, charges three independent battery banks from a single input, with full isolation between banks\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFET technology\u003c\/strong\u003e, eliminates the 0.6V to 0.7V voltage drop found in diode-based isolators, so each bank gets the full charge voltage\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCurrent rating\u003c\/strong\u003e, 100A continuous across the combined output\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlternator protection\u003c\/strong\u003e, built-in circuit prevents voltage spikes if the unit is disconnected under load\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHousing\u003c\/strong\u003e, compact aluminium casing suited to engine bays and confined spaces\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem voltage\u003c\/strong\u003e, compatible with 12V and 24V systems\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eProduct overview\u003c\/h2\u003e\u003cp\u003eDiode isolators drop around 0.6V to 0.7V on every charge path, which means connected banks never quite reach full charge voltage. Over time this shortens battery life and reduces usable capacity. The Argofet 100-3 uses MOSFET technology instead, so the alternator or charger's full output voltage reaches each bank.\u003c\/p\u003e\u003cp\u003eThree output banks from one input suits a typical setup of a starter battery, a domestic bank, and a third bank for a bow thruster, generator start or additional load. Each output stays isolated, so a deeply discharged bank cannot pull down voltage on the others. The alternator protection circuit matters here: disconnecting a battery from a running alternator can send a damaging voltage spike back through the system, and this circuit suppresses that risk.\u003c\/p\u003e\u003cp\u003eThe aluminium housing dissipates heat without needing a cooling fan under normal conditions, and it is compact enough for tight engine compartments.\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cp\u003eFitted on marine vessels with separate starter, domestic and thruster banks run from one alternator; motorhomes and campervans isolating the starter battery from leisure banks; off-grid vehicles or plant equipment with multiple banks serving different loads; and any setup where one charger must feed three banks without cross-discharge.\u003c\/p\u003e\u003ch2\u003eWhat's in the box\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e1 x Victron Argofet 100-3 FET battery isolator\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eInstallation notes\u003c\/h2\u003e\u003cp\u003eFitting should be carried out by a qualified auto-electrician or marine electrician working with high-current DC systems. Torque connections correctly and fuse each output cable close to the battery terminals. Mount on a surface that allows heat to dissipate, and confirm 12V or 24V system compatibility before wiring in. Do not disconnect battery banks while the alternator is running, even with the protection circuit fitted.\u003c\/p\u003e","brand":"Victron Energy","offers":[{"title":"Default Title","offer_id":52095601082656,"sku":"ARG100301020","price":98.69,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1010\/8148\/1504\/files\/ledandsolar-arg100301020-1.webp?v=1785754793"},{"product_id":"victron-argodiode-80a-isolator","title":"Victron Argodiode 80-2AC Battery Isolator 80A | ARG080201000","description":"\u003cp\u003eThe Victron Argodiode 80-2AC is a diode-based battery isolator that charges two separate battery banks from a single alternator or charger, without letting current flow between them. It suits marine, vehicle and off-grid setups where you need bank isolation without the complexity of relays.\u003c\/p\u003e\u003ch2\u003eKey features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eIsolation\u003c\/strong\u003e, Schottky diodes isolate two battery banks from one charging source, preventing cross-discharge between them.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCurrent rating\u003c\/strong\u003e, 80A continuous, suited to medium-duty alternator and charger installations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration\u003c\/strong\u003e, 2AC design gives two isolated outputs from a single input, each able to carry the full rated current.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiode type\u003c\/strong\u003e, Schottky construction gives a lower forward voltage drop than standard silicon diodes, cutting charging losses.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e, 0.606kg, with no moving parts and no maintenance needed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperation\u003c\/strong\u003e, passive, with no control wiring, relays or external power supply required.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eHow it works\u003c\/h2\u003e\u003cp\u003eDiode isolators pass current in one direction only. The Argodiode 80-2AC takes a single input from an alternator or charger and splits it across two output terminals, each wired to a separate battery bank. Because the diodes block reverse current, neither bank can discharge into the other, so a fault or deep discharge on one bank leaves the other unaffected.\u003c\/p\u003e\u003cp\u003eThe Schottky diodes used here drop less voltage than conventional silicon diodes, but that drop still reduces the charging voltage the batteries actually see. In alternator systems, the regulator output should be set around 0.5V to 0.6V higher than normal to compensate, an adjustment that's straightforward where the regulator is accessible.\u003c\/p\u003e\u003cp\u003eThe 80A rating covers total input current, shared across both output banks, so check that combined charging load on both banks stays within 80A. No control wiring is needed and there's no switching noise, which suits installations where simplicity and long service life matter more than active control.\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMarine installations isolating a starter battery from a domestic or service bank.\u003c\/li\u003e\n\u003cli\u003eCampervans, motorhomes and HGVs keeping the starter battery separate from a leisure battery.\u003c\/li\u003e\n\u003cli\u003eOff-grid systems with one charger feeding two independent battery banks.\u003c\/li\u003e\n\u003cli\u003eDual-battery 4x4 and commercial vehicle setups needing cross-discharge prevention.\u003c\/li\u003e\n\u003cli\u003eAny application where passive isolation replaces a relay-based battery-to-battery charger.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhat's in the box\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e1 x Victron Argodiode 80-2AC battery isolator\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eInstallation notes\u003c\/h2\u003e\u003cp\u003eFit this by a qualified electrician or competent marine\/vehicle electrical engineer. Rate the input and both output cables correctly for the current and fuse each output appropriately. When fed from a vehicle alternator, raise the regulator voltage by around 0.5V to 0.6V to offset the diode drop and keep the batteries fully charged. Mount on a solid, ventilated surface, since the heatsink warms under load, and never enclose the unit somewhere sealed with no way to lose heat.\u003c\/p\u003e","brand":"Victron Energy","offers":[{"title":"Default Title","offer_id":52095603638560,"sku":"ARG080201000","price":38.31,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1010\/8148\/1504\/files\/ledandsolar-arg080201000-1.webp?v=1785755135"},{"product_id":"argofet-100-2-battery-isolator","title":"Victron Argofet 100-2 FET Battery Isolator 100A | ARG100201020","description":"\u003cp\u003eThe Victron Argofet 100-2 is a FET-based battery isolator that charges two separate battery banks from a single alternator or charger, without the voltage drop that diode isolators introduce. It suits marine, vehicle and off-grid systems where independent battery banks need to stay isolated from each other during discharge while still being charged together.\u003c\/p\u003e\u003ch2\u003eKey features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBattery outputs\u003c\/strong\u003e, charges two independent banks from one input source with no cross-discharge between them.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFET technology\u003c\/strong\u003e, removes the 0.6V to 0.7V drop typical of diode-based isolators, so batteries get the full charge voltage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCurrent rating\u003c\/strong\u003e, 100A continuous across both output banks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperation\u003c\/strong\u003e, works automatically, with no manual switching needed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e, 0.91 kg, small enough for confined installation spaces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatibility\u003c\/strong\u003e, works with standard alternators and chargers, no alternator modification required.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eHow it works\u003c\/h2\u003e\u003cp\u003eCurrent flows freely from the input to both battery banks while charging, but reverse flow between the banks is blocked. If one bank runs flat, it cannot pull current from the other through the isolator. That makes it a good fit for setups with a starter battery and a separate leisure or service battery that must stay independent in use but share one charging source. No external control signal or relay is needed for normal operation, which keeps wiring simple.\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMarine vessels with separate starter and service banks on one alternator.\u003c\/li\u003e\n\u003cli\u003eCampervans, motorhomes and HGVs needing split-charge without voltage loss.\u003c\/li\u003e\n\u003cli\u003eOff-grid systems feeding two isolated battery banks from a single charger.\u003c\/li\u003e\n\u003cli\u003eCommercial vehicles with auxiliary power needs separate from the starter battery.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhat's in the box\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e1x Victron Argofet 100-2 FET battery isolator\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eInstallation notes\u003c\/h2\u003e\u003cp\u003eFit this with a qualified electrician familiar with high-current DC systems. Cabling should be rated for at least 100A continuous, with fusing on the input side close to the source. Mount in a ventilated spot, as the unit generates some heat under sustained load, and check it suits your alternator voltage and battery chemistry before wiring in.\u003c\/p\u003e","brand":"Victron Energy","offers":[{"title":"Default Title","offer_id":52095603769632,"sku":"ARG100201020","price":85.04,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1010\/8148\/1504\/files\/ledandsolar-arg100201020-1.webp?v=1785755156"},{"product_id":"victron-cyrix-li-load-230a-relay","title":"Victron Cyrix-Li-load 12\/24V-230A Intelligent Load Relay | CYR010230450","description":"\u003cp\u003eThe Victron Cyrix-Li-load is a microprocessor-controlled load relay built for lithium battery systems running at 12V or 24V. It disconnects non-essential loads when battery voltage drops to a critical level, protecting the battery from deep discharge. Rated at 230A continuous, it handles demanding DC load circuits in marine, vehicle and off-grid installations.\u003c\/p\u003e\u003ch2\u003eKey features of this battery isolator switch\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eContinuous current\u003c\/strong\u003e, 230A, suited to high-draw DC load circuits.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem voltage\u003c\/strong\u003e, compatible with 12V and 24V lithium battery systems, with thresholds calibrated for Li chemistry.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomatic disconnect\u003c\/strong\u003e, microprocessor logic monitors battery voltage and opens the load circuit at a programmable low-voltage threshold.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomatic reconnect\u003c\/strong\u003e, loads reconnect once the battery recovers to a safe voltage, with no manual intervention needed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e, 0.3 kg, compact enough for confined installations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBMS integration\u003c\/strong\u003e, works alongside Victron Battery Management Systems and can be controlled via a BMS load disconnect signal.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eHow it protects lithium batteries\u003c\/h2\u003e\u003cp\u003eUnlike a standard battery combiner, the Cyrix-Li-load exists to shed loads rather than join battery banks. When voltage falls below the disconnect threshold, the relay opens and isolates the load circuit. This matters for lithium chemistries, which can be damaged or made unsafe if discharged below their minimum cell voltage.\u003c\/p\u003e\u003cp\u003eAt 230A the unit handles substantial DC loads: inverters, winches, bow thrusters and other high-current consumers. The microprocessor applies hysteresis to avoid rapid cycling at the threshold boundary. Where a Victron BMS is fitted, the relay can also accept a direct load disconnect signal from it, giving the BMS control over load shedding independent of voltage alone.\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eLoad protection on lithium battery banks in marine and narrowboat systems.\u003c\/li\u003e\n\u003cli\u003eNon-essential load shedding in off-grid cabins and mobile off-grid vehicles.\u003c\/li\u003e\n\u003cli\u003eMotorhome and campervan DC systems with lithium batteries powering high-current appliances.\u003c\/li\u003e\n\u003cli\u003eOverland and expedition vehicles with lithium house battery banks.\u003c\/li\u003e\n\u003cli\u003eAny 12V or 24V lithium installation needing automatic low-voltage load disconnect.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhat's in the box\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e1 x Cyrix-Li-load 12\/24V-230A intelligent load relay\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eInstallation notes\u003c\/h2\u003e\u003cp\u003eFitting should be carried out by a qualified electrician or experienced marine\/vehicle installer. The relay must be wired in series with the load circuit, not the battery charging circuit. Cable sizing should suit the 230A continuous rating, with suitable fusing fitted close to the battery. When integrating with a Victron BMS, refer to the BMS wiring documentation to configure the load disconnect signal correctly.\u003c\/p\u003e","brand":"Victron Energy","offers":[{"title":"Default Title","offer_id":52095605113120,"sku":"CYR010230450","price":139.64,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1010\/8148\/1504\/files\/ledandsolar-cyr010230450-1.webp?v=1785755304"},{"product_id":"victron-cyrix-li-charge-relay-120a","title":"Victron Cyrix-Li-Charge 24\/48V 120A Charge Relay | CYR020120430","description":"\u003cp\u003eThe Cyrix-Li-Charge is a microprocessor-controlled charge relay from Victron Energy, built to combine a lithium battery bank with a secondary battery or charging source across 24V and 48V systems. It suits off-grid, marine and vehicle installations where lithium and lead-acid batteries need separate management but share a common charge source.\u003c\/p\u003e\u003ch2\u003eKey features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCurrent rating\u003c\/strong\u003e, 120A continuous, for 24V and 48V systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eControl logic\u003c\/strong\u003e, microprocessor-controlled, monitors battery voltage and connects or disconnects the charge circuit automatically.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBattery chemistry\u003c\/strong\u003e, designed for lithium cells, preventing incorrect charge sharing that could damage them.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e, 0.12 kg, easy to fit into confined spaces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem fit\u003c\/strong\u003e, works alongside Victron's battery management range, including BMV monitors and BMS units.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eHow it works\u003c\/h2\u003e\u003cp\u003eThe relay watches the voltage of the starter or secondary battery. Once that voltage shows active charging, the relay closes and lets current flow into the lithium bank. When charging stops and voltage drops, it opens again, isolating the two banks so the lithium battery cannot discharge back into the starter circuit or alternator.\u003c\/p\u003e\u003cp\u003eRated at 24V and 48V, this unit is meant for larger off-grid and commercial vehicle systems where 12V isn't enough. At 120A it manages substantial charge currents without needing an oversized relay or extra controller, and the automatic logic cuts out manual switching in unattended setups.\u003c\/p\u003e\u003cp\u003eThis relay works with, not instead of, a dedicated lithium BMS. It does not provide cell-level protection on its own: the BMS must retain that control, with the Cyrix-Li-Charge only handling the charge-source combining task.\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eOff-grid solar systems with a 24V or 48V lithium bank and a secondary lead-acid starter battery.\u003c\/li\u003e\n\u003cli\u003eMarine installations charging a lithium house bank from an alternator without a direct alternator-to-lithium connection.\u003c\/li\u003e\n\u003cli\u003eCommercial vehicles and motorhomes running split 24V or 48V battery systems.\u003c\/li\u003e\n\u003cli\u003eHybrid battery setups requiring isolation during discharge but combination during charging.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhat's in the box\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e1x Victron Cyrix-Li-Charge 24\/48V 120A intelligent charge relay\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eInstallation notes\u003c\/h2\u003e\u003cp\u003eFit this by a qualified electrician or accredited installer familiar with lithium systems. It must be paired with a compatible lithium BMS, since it does not provide cell-level protection independently. Check polarity and use cabling rated for the full 120A load. Marine fitting should follow applicable NMEA and flag-state wiring standards, and the unit should not go into a sealed, unventilated enclosure without confirming thermal suitability.\u003c\/p\u003e","brand":"Victron Energy","offers":[{"title":"Default Title","offer_id":52095609405728,"sku":"CYR020120430","price":65.09,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1010\/8148\/1504\/files\/ledandsolar-cyr020120430-1.webp?v=1785755763"},{"product_id":"victron-cyrix-li-load-charge-relay","title":"Victron Cyrix-Li-load 24\/48V 230A Charge Relay | CYR020230450","description":"\u003cp\u003eThe Cyrix-Li-load is a microprocessor-controlled battery isolator and load relay built for lithium battery systems running at 24V or 48V. It connects and disconnects loads based on battery voltage, protecting lithium cells from over-discharge without needing manual intervention. It suits marine, vehicle and off-grid installations where load management matters.\u003c\/p\u003e\u003ch2\u003eKey features of this battery isolator switch\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eContinuous current\u003c\/strong\u003e, rated at 230A, suitable for high-load DC circuits at 24V or 48V.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSwitching logic\u003c\/strong\u003e, microprocessor-controlled, responding to battery voltage thresholds rather than a simple relay timer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBattery chemistry\u003c\/strong\u003e, designed for lithium chemistries, with disconnect behaviour matched to Li-ion and LiFePO4 charge profiles.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow-voltage protection\u003c\/strong\u003e, disconnects loads automatically once voltage drops to a programmable low threshold, preventing deep discharge.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomatic reconnection\u003c\/strong\u003e, loads reconnect once the battery recovers to a safe voltage, with no manual reset needed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e, 0.3 kg, compact enough for confined spaces.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eProduct overview\u003c\/h2\u003e\u003cp\u003eThe relay monitors battery voltage and switches a high-current contact to connect or isolate the load circuit. Unlike a standard combiner, it is built around the voltage windows specific to lithium batteries, so it will not reconnect a load prematurely after a low-voltage event, a common cause of repeated deep discharge in lithium systems.\u003c\/p\u003e\u003cp\u003eAt 230A the relay handles substantial DC loads: inverters, winches, bow thrusters and other high-draw appliances. Dual 24\/48V compatibility means one part number covers both voltages. The microprocessor logic filters out brief voltage dips so transient loads do not cause unnecessary disconnections.\u003c\/p\u003e\u003cp\u003eThis unit belongs to Victron's Cyrix range, used across marine, motorhome and off-grid installations. It is not a BMS replacement. It works alongside a BMS to manage load-side disconnection based on voltage conditions.\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eLoad disconnection in 24V or 48V lithium systems on narrowboats, yachts and motorhomes.\u003c\/li\u003e\n\u003cli\u003eOff-grid cabins and mobile installations needing automatic load shedding.\u003c\/li\u003e\n\u003cli\u003eCommercial vehicle auxiliary power systems using lithium batteries.\u003c\/li\u003e\n\u003cli\u003eAny DC system where loads must be isolated to prevent lithium over-discharge.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhat's in the box\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e1 x Cyrix-Li-load 24\/48V-230A intelligent charge relay unit\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eInstallation notes\u003c\/h2\u003e\u003cp\u003eFit this by a qualified electrician or experienced marine or vehicle electrical engineer. Wire the unit in line with the load circuit, not the charge circuit. Size cabling for 230A continuous current and fit suitable fusing on the battery side. This unit is intended for lithium battery systems only; check voltage threshold compatibility before use with lead-acid. Follow applicable wiring regulations for marine and off-grid installations.\u003c\/p\u003e","brand":"Victron Energy","offers":[{"title":"Default Title","offer_id":52095610159392,"sku":"CYR020230450","price":138.46,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1010\/8148\/1504\/files\/ledandsolar-cyr020230450-1.webp?v=1785755844"},{"product_id":"victron-cyrix-li-charge-intelligent-relay","title":"Victron Cyrix-Li-charge 24\/48V-230A Intelligent Charge Relay | CYR020230430","description":"\u003cp\u003eThe Victron Cyrix-Li-charge 24\/48V-230A is a microprocessor-controlled battery isolator that combines a starter or auxiliary battery with a lithium house bank while charging, then disconnects once charging stops. It's built for 24V and 48V lithium battery systems and rated at 230A continuous current, making it suitable for marine, vehicle and off-grid installations where lithium battery protection matters.\u003c\/p\u003e\u003ch2\u003eKey features of this battery isolator switch\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCurrent rating\u003c\/strong\u003e, 230A continuous, for high-demand 24V and 48V lithium systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBMS-controlled logic\u003c\/strong\u003e, microprocessor monitors battery management system signals to allow or block charging.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomatic operation\u003c\/strong\u003e, connects when charge voltage is detected, disconnects when charging ceases.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLithium-specific design\u003c\/strong\u003e, responds correctly to BMS allow-to-charge signals for LiFePO4 chemistries.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e, 0.3 kg, compact enough for confined installation spaces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatibility\u003c\/strong\u003e, works with Victron BMS products that output a load or charge disconnect signal.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eHow it works\u003c\/h2\u003e\u003cp\u003eUnlike a standard battery combiner, the Cyrix-Li-charge is designed around a lithium BMS. When the BMS signals that charging is permitted, the relay closes and connects the charge source to the lithium bank. If the BMS issues a charge disconnect signal, perhaps due to high cell voltage or temperature, the relay opens immediately to protect the battery from overcharge.\u003c\/p\u003e\u003cp\u003eAt 230A it can handle substantial charge currents from alternators, DC-DC chargers or shore power converters in 24V and 48V systems. The microprocessor logic stops the relay chattering or cycling unnecessarily, which helps both relay and battery last longer.\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eLithium house bank charging from a starter battery or alternator on boats.\u003c\/li\u003e\n\u003cli\u003e24V or 48V off-grid systems combining a lithium bank with a secondary charge source.\u003c\/li\u003e\n\u003cli\u003eCommercial vehicle auxiliary power systems using LiFePO4 batteries.\u003c\/li\u003e\n\u003cli\u003eNarrowboat and canal boat electrical systems after a lithium upgrade.\u003c\/li\u003e\n\u003cli\u003eOff-grid cabins and mobile installations needing BMS-controlled charge isolation.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhat's in the box\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e1 x Victron Cyrix-Li-charge 24\/48V-230A intelligent charge relay\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eInstallation notes\u003c\/h2\u003e\u003cp\u003eFit this with a qualified electrician or experienced marine\/vehicle electrical engineer. It must be wired alongside a compatible lithium BMS that provides a charge disconnect output signal; without that signal the unit cannot protect the battery from overcharge. Cabling should be rated for the 230A continuous load, with appropriate fusing on both battery connections.\u003c\/p\u003e","brand":"Victron Energy","offers":[{"title":"Default Title","offer_id":52095610781984,"sku":"CYR020230430","price":139.64,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1010\/8148\/1504\/files\/ledandsolar-cyr020230430-1.webp?v=1785755909"},{"product_id":"victron-cyrix-li-load-intelligent-relay","title":"Victron Cyrix-Li-load 12\/24V-120A Intelligent Load Relay | CYR010120450","description":"\u003cp\u003eThe Cyrix-Li-load is a microprocessor-controlled load relay from Victron Energy that protects lithium batteries from over-discharge. It disconnects non-essential loads once the battery reaches a critically low state, and is rated for 12V and 24V systems at 120A continuous. Installers working on marine, vehicle and off-grid projects use it where lithium battery protection matters.\u003c\/p\u003e\u003ch2\u003eKey features of this battery isolator switch\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCurrent rating\u003c\/strong\u003e, 120A continuous on 12V and 24V DC systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMicroprocessor control\u003c\/strong\u003e, monitors battery voltage and disconnects loads automatically below a safe threshold\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLithium-specific logic\u003c\/strong\u003e, responds to the steeper voltage curves of LiFePO4 and similar cells\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomatic reconnection\u003c\/strong\u003e, loads restore once voltage recovers, no manual reset needed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e, 0.12 kg, suitable for confined installation spaces\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBMS integration\u003c\/strong\u003e, accepts a remote on\/off signal from a Victron battery management system\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eHow it works\u003c\/h2\u003e\u003cp\u003eThe relay monitors terminal voltage and opens when the battery approaches full discharge. Because lithium cells have a flat discharge curve until near the end of capacity, the microprocessor logic allows accurate disconnection without shedding loads prematurely during normal use.\u003c\/p\u003e\u003cp\u003eIt sits between the lithium battery and non-essential loads such as lighting circuits or auxiliary consumers, while essential loads are usually wired separately. Paired with a Victron BMS, the BMS can force the relay open independently of the voltage threshold during a fault or cell imbalance event.\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eLithium battery load protection on marine and narrowboat electrical systems\u003c\/li\u003e\n\u003cli\u003eAuxiliary load disconnection in campervans, motorhomes and off-road vehicles with lithium house batteries\u003c\/li\u003e\n\u003cli\u003eOff-grid cabin and caravan systems needing over-discharge protection for LiFePO4 banks\u003c\/li\u003e\n\u003cli\u003eSecondary load management in 12V or 24V commercial vehicle fit-outs\u003c\/li\u003e\n\u003cli\u003eAutomated load shedding when integrated with a Victron BMS\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation notes\u003c\/h2\u003e\u003cp\u003eFit this by a qualified electrician familiar with lithium systems. Wire it in series with the load circuit being protected, not in the main battery positive feed, and fuse the circuit correctly for the cable rating. This unit is not for lead-acid systems, where a standard Cyrix combiner should be used instead.\u003c\/p\u003e\u003ch2\u003eWhat's in the box\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e1 x Cyrix-Li-load 12\/24V-120A intelligent load relay\u003c\/li\u003e\u003c\/ul\u003e","brand":"Victron Energy","offers":[{"title":"Default Title","offer_id":52095614452000,"sku":"CYR010120450","price":55.43,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1010\/8148\/1504\/files\/ledandsolar-cyr010120450-1.webp?v=1785756293"},{"product_id":"victron-bcd-402-combiner-diode","title":"Victron BCD 402 Battery Combiner Diode 2 Batteries 40A | BCD000402000","description":"\u003cp\u003eThe Victron BCD 402 is a diode based battery combiner rated at 40A, built to charge two separate battery banks from a single charge source. It suits installers working on marine, leisure and off-grid systems where two batteries need isolated charging without the voltage drop and switching complexity of a relay-based combiner. The diode design keeps the batteries electrically separated while both receive charge at the same time.\u003c\/p\u003e\u003ch2\u003eKey features of the battery isolator switch\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCombiner function\u003c\/strong\u003e, combines charge current from one source to two separate battery banks\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRated current\u003c\/strong\u003e, 40A continuous\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIsolation\u003c\/strong\u003e, diode-based design keeps battery banks isolated from each other\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo moving parts\u003c\/strong\u003e, no relays, reducing points of failure in the charging circuit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e, 0.49 kg, suited to tight installation spaces\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible sources\u003c\/strong\u003e, works with a single alternator, solar controller or charger feeding two banks\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eHow it works\u003c\/h2\u003e\u003cp\u003eDiode battery combiners allow current to flow from the charge source to each battery bank while preventing current flowing back between the two banks. A starter battery and a leisure battery can share one charging source without one bank draining into the other when the engine is off or the source is disconnected. With no moving contacts, there is nothing to wear out mechanically over the life of the installation.\u003c\/p\u003e\u003cp\u003eThe trade-off against relay-based isolators is a small forward voltage drop across the diode, typically around 0.5 to 0.7 volts. Installers should account for this when setting charge voltages, particularly where charge controllers do not compensate for the drop. The BCD 402 is rated at 40A, so size it correctly against the maximum output current of the charge source in use.\u003c\/p\u003e\u003ch2\u003eApplications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMarine installations with separate starter and house battery banks\u003c\/li\u003e\n\u003cli\u003eMotorhomes and campervans charging a leisure battery alongside a vehicle starter battery\u003c\/li\u003e\n\u003cli\u003eOff-grid cabins with a single charge source feeding two battery banks\u003c\/li\u003e\n\u003cli\u003eBackup systems where isolation between battery banks is required for reliability\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhat's in the box\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e1 x Victron BCD 402 battery combiner diode unit\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eInstallation notes\u003c\/h3\u003e\u003cp\u003eInstallation should be carried out by a qualified installer familiar with DC electrical systems and battery bank wiring. Confirm the combined charge current does not exceed the 40A rating, and allow for the diode voltage drop when configuring charge controller output voltages. Correct cable sizing and fusing on each battery output is required.\u003c\/p\u003e","brand":"Victron Energy","offers":[{"title":"Default Title","offer_id":52095615664416,"sku":"BCD000402000","price":29.91,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1010\/8148\/1504\/files\/ledandsolar-bcd000402000-1.webp?v=1785756400"}],"url":"https:\/\/www.ledandsolar.co.uk\/collections\/victron-battery-protect-isolators.oembed?page=2","provider":"LED \u0026 Solar","version":"1.0","type":"link"}