{"product_id":"victron-cyrix-li-charge-12-24v-120a","title":"Victron Cyrix-Li-charge 12\/24V-120A intelligent charge relay - CYR010120430","description":"\u003ch1 style=\"color: #f87c24;\"\u003eVictron Cyrix-Li-charge 12\/24V-120A Intelligent Charge Relay | CYR010120430\u003c\/h1\u003e\n\n\u003cp\u003eThe Cyrix-Li-charge 12\/24V-120A is a microprocessor-controlled charge relay designed to combine a lithium (LiFePO4) service battery with a starter battery in 12V or 24V systems. It allows the alternator or charger to charge both battery banks simultaneously, while protecting the lithium battery from unsafe charging conditions. Suitable for marine, vehicle and off-grid installations where a lithium service bank is paired with a conventional lead-acid starter battery.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #f87c24;\"\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eRated at 120A continuous current, suitable for high-demand dual-battery systems on 12V or 24V platforms.\u003c\/li\u003e\n  \u003cli\u003eMicroprocessor-controlled operation: the relay connects and disconnects based on voltage thresholds, with no manual intervention required during normal use.\u003c\/li\u003e\n  \u003cli\u003eDesigned specifically for lithium battery systems: the relay opens immediately if the Battery Management System (BMS) sends a charge disconnect signal, preventing overcharge of the lithium bank.\u003c\/li\u003e\n  \u003cli\u003eConnects when the starter battery reaches approximately 13.2V (12V system) or 26.4V (24V system), ensuring the alternator is not loaded before the engine is running.\u003c\/li\u003e\n  \u003cli\u003eDisconnects when voltage drops below threshold, preventing the lithium bank from discharging into the starter battery.\u003c\/li\u003e\n  \u003cli\u003eCompatible with Victron BMS charge disconnect output, allowing the BMS to take direct control of the relay.\u003c\/li\u003e\n  \u003cli\u003eCompact and lightweight at 0.12 kg, with a straightforward wiring configuration for professional installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"color: #f87c24;\"\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe Cyrix-Li-charge operates differently from a standard battery combiner. In a conventional combiner, the relay closes whenever either battery reaches a set voltage. The Cyrix-Li-charge is configured so that the lithium service battery side is passive: the relay only closes when the starter battery voltage rises, indicating that charging is actively taking place. This prevents the lithium bank from back-feeding into the starter battery when the engine is off.\u003c\/p\u003e\n\n\u003cp\u003eThe critical feature for lithium installations is the BMS integration. Victron lithium batteries with a BMS can output a charge disconnect signal when the battery is full or when a cell imbalance is detected. The Cyrix-Li-charge responds to this signal by opening the relay immediately, isolating the lithium bank from the charging source. This makes it a necessary component in any dual-battery system where a Victron lithium battery is used alongside a lead-acid starter battery charged by an alternator.\u003c\/p\u003e\n\n\u003cp\u003eThe unit handles 12V and 24V systems without any configuration change, making it a practical stock item for installers working across different vehicle and vessel platforms. At 120A, it covers the majority of alternator outputs found in commercial vehicles, motorhomes, and narrowboats.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #f87c24;\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable style=\"border: 2px solid #f87c24; border-collapse: collapse; width: 100%;\"\u003e\n  \u003cthead\u003e\n    \u003ctr style=\"background-color: #f87c24; color: #ffffff;\"\u003e\n      \u003ctd style=\"border: 1px solid #f87c24; padding: 8px;\"\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/td\u003e\n      \u003ctd style=\"border: 1px solid #f87c24; padding: 8px;\"\u003e\u003cstrong\u003eValue\u003c\/strong\u003e\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border: 1px solid #f87c24; padding: 8px;\"\u003eSKU\u003c\/td\u003e\n      \u003ctd style=\"border: 1px solid #f87c24; padding: 8px;\"\u003eCYR010120430\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border: 1px solid #f87c24; padding: 8px;\"\u003eVoltage Compatibility\u003c\/td\u003e\n      \u003ctd style=\"border: 1px solid #f87c24; padding: 8px;\"\u003e12V \/ 24V (auto-detect)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border: 1px solid #f87c24; padding: 8px;\"\u003eContinuous Current Rating\u003c\/td\u003e\n      \u003ctd style=\"border: 1px solid #f87c24; padding: 8px;\"\u003e120A\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border: 1px solid #f87c24; padding: 8px;\"\u003eConnect Voltage (12V system)\u003c\/td\u003e\n      \u003ctd style=\"border: 1px solid #f87c24; padding: 8px;\"\u003e~13.2V\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border: 1px solid #f87c24; padding: 8px;\"\u003eConnect Voltage (24V system)\u003c\/td\u003e\n      \u003ctd style=\"border: 1px solid #f87c24; padding: 8px;\"\u003e~26.4V\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border: 1px solid #f87c24; padding: 8px;\"\u003eBMS Integration\u003c\/td\u003e\n      \u003ctd style=\"border: 1px solid #f87c24; padding: 8px;\"\u003eCompatible with Victron BMS charge disconnect output\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border: 1px solid #f87c24; padding: 8px;\"\u003eBattery Chemistry\u003c\/td\u003e\n      \u003ctd style=\"border: 1px solid #f87c24; padding: 8px;\"\u003eLithium (LiFePO4) service battery with lead-acid starter battery\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border: 1px solid #f87c24; padding: 8px;\"\u003eWeight\u003c\/td\u003e\n      \u003ctd style=\"border: 1px solid #f87c24; padding: 8px;\"\u003e0.12 kg\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"border: 1px solid #f87c24; padding: 8px;\"\u003eGTIN\u003c\/td\u003e\n      \u003ctd style=\"border: 1px solid #f87c24; padding: 8px;\"\u003e8719076022183\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3 style=\"color: #f87c24;\"\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eMotorhomes and campervans with a lithium leisure battery and a vehicle starter battery charged from the alternator.\u003c\/li\u003e\n  \u003cli\u003eNarrowboats and canal boats with a lithium service bank alongside a lead-acid engine start battery.\u003c\/li\u003e\n  \u003cli\u003eMarine vessels requiring BMS-controlled charge isolation to protect a lithium battery bank.\u003c\/li\u003e\n  \u003cli\u003eOff-grid vehicles and expedition builds where alternator charging feeds a lithium battery system.\u003c\/li\u003e\n  \u003cli\u003eAny dual-battery installation where a Victron lithium battery BMS must be able to interrupt the charge circuit.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"color: #f87c24;\"\u003eWhat Is Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1x Victron Cyrix-Li-charge 12\/24V-120A intelligent charge relay\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"color: #f87c24;\"\u003eInstallation Notes\u003c\/h3\u003e\n\u003cp\u003eInstallation should be carried out by a qualified electrician or experienced marine\/vehicle electrical installer. The Cyrix-Li-charge must be wired in accordance with the Victron installation manual, with correct fusing on both battery connections. The BMS charge disconnect wire must be connected for the lithium protection function to operate. Do not use this relay as a standalone combiner without BMS integration in a lithium system. For marine installations, follow RCD or MCA wiring standards as applicable. Always verify polarity and voltage compatibility before energising the circuit.\u003c\/p\u003e","brand":"Victron Energy","offers":[{"title":"Default Title","offer_id":59845813174606,"sku":"CYR010120430","price":61.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0796\/3698\/8238\/files\/VoltaconSolar_-_CYR010120430_-_Cyrix-Li-charge_12-24V-120A_intelligent_charge_relay.webp?v=1781019901","url":"https:\/\/voltaconsolar.com\/products\/victron-cyrix-li-charge-12-24v-120a","provider":"VoltaconSolar","version":"1.0","type":"link"}