{"product_id":"victron-cyrix-li-ct-120-amp-battery-combiner-relay-vsr","title":"Victron Cyrix Li-CT 120 Amp Battery Combiner Relay (VSR)","description":"\u003cp\u003eThe Victron Cyrix-Li-ct 12\/24V-120A is an intelligent battery combiner relay (Voltage Sensitive Relay – VSR) specifically designed for Victron Lithium (LiFePO4) battery systems. It automatically connects and disconnects battery banks based on charging conditions while remaining under the control of a Victron BMS, making it ideal for alternator charging applications in motorhomes, campervans, boats, off-grid systems, and mobile power installations. \u003cspan class=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eUnlike the Cyrix-Li-Charge models, which are intended to control battery chargers, the Cyrix-Li-ct is designed to connect and isolate battery banks. It allows charging from an alternator while ensuring lithium battery protection through integration with the Victron BMS. If the BMS detects unsafe conditions such as cell under-voltage, over-voltage, or excessive temperature, the relay automatically disconnects the battery bank. \u003cspan class=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eIntelligent lithium battery combiner relay\u003c\/li\u003e\n\u003cli\u003eDesigned for Victron LiFePO4 battery systems\u003c\/li\u003e\n\u003cli\u003eCompatible with 12V and 24V systems\u003c\/li\u003e\n\u003cli\u003e120A continuous current rating\u003c\/li\u003e\n\u003cli\u003eBMS-controlled operation\u003c\/li\u003e\n\u003cli\u003eAutomatic battery bank connection and isolation\u003c\/li\u003e\n\u003cli\u003eSuitable for alternator charging systems\u003c\/li\u003e\n\u003cli\u003ePrevents lithium battery damage\u003c\/li\u003e\n\u003cli\u003eVery low voltage drop\u003c\/li\u003e\n\u003cli\u003eHeavy-duty relay construction\u003c\/li\u003e\n\u003cli\u003eM6 terminal studs\u003c\/li\u003e\n\u003cli\u003eAutomatic voltage detection\u003c\/li\u003e\n\u003cli\u003eLow standby power consumption\u003c\/li\u003e\n\u003cli\u003eCompact and lightweight design\u003c\/li\u003e\n\u003cli\u003e5-year Victron warranty \u003cspan class=\"\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv class=\"TyagGW_tableContainer\"\u003e\n\u003cdiv class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\"\u003e\n\u003ctable class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth class=\"last:pe-10\"\u003eSpecification\u003c\/th\u003e\n\u003cth class=\"last:pe-10\"\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eVictron Energy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eCyrix-Li-ct 12\/24V-120A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Code\u003c\/td\u003e\n\u003ctd\u003eVV-164\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVictron Part Number\u003c\/td\u003e\n\u003ctd\u003eCYR010120310*\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem Voltage\u003c\/td\u003e\n\u003ctd\u003e12V \/ 24V Auto-Ranging\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eContinuous Current Rating\u003c\/td\u003e\n\u003ctd\u003e120A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTerminal Type\u003c\/td\u003e\n\u003ctd\u003eM6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl Method\u003c\/td\u003e\n\u003ctd\u003eVictron BMS Controlled\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtection Function\u003c\/td\u003e\n\u003ctd\u003eLithium Battery Protection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery Chemistry\u003c\/td\u003e\n\u003ctd\u003eLiFePO4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Principle\u003c\/td\u003e\n\u003ctd\u003eIntelligent Voltage Sensitive Relay\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eApprox. 46 × 46 × 80mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003eApprox. 0.11kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e5 Years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e*Part numbers can vary slightly depending on kit or retail packaging version.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eHow the Cyrix-Li-ct Works\u003c\/h3\u003e\n\u003ch4\u003eIntelligent Battery Combining\u003c\/h4\u003e\n\u003cp\u003eThe Cyrix-Li-ct automatically connects two battery banks when charging voltage is present and disconnects them when charging stops. This allows charging energy from an alternator or charging source to be shared safely between battery banks. \u003cspan class=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4\u003eLithium Battery Protection\u003c\/h4\u003e\n\u003cp\u003eThe relay works in conjunction with a Victron Battery Management System. If the BMS detects:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCell under-voltage\u003c\/li\u003e\n\u003cli\u003eCell over-voltage\u003c\/li\u003e\n\u003cli\u003eHigh temperature\u003c\/li\u003e\n\u003cli\u003eUnsafe battery conditions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003ethe relay opens immediately to protect the lithium battery bank. \u003cspan class=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4\u003eNo Significant Voltage Loss\u003c\/h4\u003e\n\u003cp\u003eUnlike diode battery isolators, the Cyrix relay introduces virtually no voltage drop, allowing alternators and chargers to deliver full charging voltage to connected batteries. \u003cspan class=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eCyrix-Li-ct vs Cyrix-Li-Charge\u003c\/h3\u003e\n\u003cdiv class=\"TyagGW_tableContainer\"\u003e\n\u003cdiv class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\"\u003e\n\u003ctable class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth class=\"last:pe-10\"\u003eFeature\u003c\/th\u003e\n\u003cth class=\"last:pe-10\"\u003eCyrix-Li-ct 120A\u003c\/th\u003e\n\u003cth class=\"last:pe-10\"\u003eCyrix-Li-Charge 120A\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePurpose\u003c\/td\u003e\n\u003ctd\u003eBattery combining\u003c\/td\u003e\n\u003ctd\u003eCharger control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAlternator charging\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMS controlled\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eContinuous current\u003c\/td\u003e\n\u003ctd\u003e120A\u003c\/td\u003e\n\u003ctd\u003e120A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLithium battery protection\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnects battery banks\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControls chargers\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003eFor alternator charging and battery bank linking, the \u003cstrong\u003eCyrix-Li-ct\u003c\/strong\u003e is the correct choice. For controlling battery chargers under BMS supervision, use the \u003cstrong\u003eCyrix-Li-Charge\u003c\/strong\u003e. \u003cspan class=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eCompatible Victron Products\u003c\/h3\u003e\n\u003cp\u003eThe Cyrix-Li-ct is designed for use with:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eVictron Lithium Smart Batteries\u003c\/li\u003e\n\u003cli\u003eVictron VE.Bus BMS\u003c\/li\u003e\n\u003cli\u003eVictron VE.Bus BMS V2\u003c\/li\u003e\n\u003cli\u003eVictron Lynx Smart BMS\u003c\/li\u003e\n\u003cli\u003eVictron MultiPlus systems\u003c\/li\u003e\n\u003cli\u003eVictron Quattro systems\u003c\/li\u003e\n\u003cli\u003eAlternator charging installations \u003cspan class=\"\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eIdeal Applications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCampervans and motorhomes\u003c\/li\u003e\n\u003cli\u003eMarine and yacht electrical systems\u003c\/li\u003e\n\u003cli\u003eOff-grid lithium battery systems\u003c\/li\u003e\n\u003cli\u003eAuxiliary battery installations\u003c\/li\u003e\n\u003cli\u003eCommercial vehicles\u003c\/li\u003e\n\u003cli\u003eMobile workshops\u003c\/li\u003e\n\u003cli\u003eRenewable energy systems\u003c\/li\u003e\n\u003cli\u003eAlternator-to-lithium charging systems \u003cspan class=\"\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy Choose the Cyrix-Li-ct 120A?\u003c\/h3\u003e\n\u003cp\u003eThe Victron Cyrix-Li-ct 120A provides a simple, reliable, and highly efficient way to connect lithium battery banks for alternator charging while maintaining full protection through a Victron BMS. With virtually zero voltage loss, intelligent switching logic, and seamless integration into the Victron ecosystem, it remains a popular solution for professional lithium battery installations where battery combining is required.\u003c\/p\u003e","brand":"Victron","offers":[{"title":"Default Title","offer_id":53221091246346,"sku":"VV-164","price":69.86,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0951\/2615\/9626\/files\/image_2c02e9c2-414f-4817-a72e-e3d8b86b784f.png?v=1781996012","url":"https:\/\/trekkashop.com\/products\/victron-cyrix-li-ct-120-amp-battery-combiner-relay-vsr","provider":"Trekkashop","version":"1.0","type":"link"}