{"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","url":"https:\/\/www.ledandsolar.co.uk\/products\/victron-argofet-200-3-battery-isolator","provider":"LED \u0026 Solar","version":"1.0","type":"link"}