{"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","url":"https:\/\/www.ledandsolar.co.uk\/products\/cyrix-ct-120a-battery-combiner","provider":"LED \u0026 Solar","version":"1.0","type":"link"}