{"product_id":"victron-cyrix-li-charge-24-48v-120a-battery-isolator","title":"Victron Cyrix-Li-charge 24\/48V-120A intelligent charge relay - CYR020120430","description":"\u003ch1 style=\"color: #f87c24;\"\u003eVictron Cyrix-Li-Charge 24\/48V 120A Intelligent Charge Relay\u003c\/h1\u003e\n\n\u003cp\u003eThe Cyrix-Li-Charge is a microprocessor-controlled charge relay designed to combine a lithium battery bank with a secondary battery or charging source in 24V and 48V systems. It is aimed at professional installers working on off-grid, marine, and vehicle power systems where lithium and lead-acid batteries need to be managed separately but charged from a common source.\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 24V and 48V battery systems.\u003c\/li\u003e\n  \u003cli\u003eMicroprocessor-controlled logic monitors battery voltage and connects or disconnects the charge circuit automatically.\u003c\/li\u003e\n  \u003cli\u003eDesigned specifically for lithium battery chemistries, preventing incorrect charge sharing that could damage Li cells.\u003c\/li\u003e\n  \u003cli\u003eAllows a lithium battery to be charged from an alternator, solar charger or other source via a secondary lead-acid or lithium starter battery.\u003c\/li\u003e\n  \u003cli\u003eCompact and lightweight at 0.12 kg, making it straightforward to install in confined spaces.\u003c\/li\u003e\n  \u003cli\u003eCompatible with Victron's broader battery management ecosystem, including BMV monitors and BMS units.\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 by monitoring the voltage of the starter or secondary battery. When that battery reaches a threshold indicating active charging, the relay closes and allows current to flow into the lithium bank. When charging stops and voltage drops, the relay opens again, isolating the two banks. This prevents the lithium battery from discharging back into the starter battery or alternator circuit.\u003c\/p\u003e\n\n\u003cp\u003eThe 24\/48V rating makes this unit suitable for larger off-grid and commercial vehicle installations where 12V is insufficient. At 120A, it handles substantial charge currents without requiring an oversized relay or external controller. The microprocessor logic removes the need for manual switching and reduces the risk of incorrect operation in unattended systems.\u003c\/p\u003e\n\n\u003cp\u003eThis relay is intended for use alongside a dedicated lithium BMS. It does not replace BMS protection functions. Installers should ensure the BMS retains full control over cell-level protection, with the Cyrix-Li-Charge handling only the charge-source combining function.\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  \u003ctr style=\"background-color: #f87c24; color: #ffffff;\"\u003e\n    \u003ctd style=\"border: 1px solid #f87c24; padding: 8px;\"\u003e\u003cstrong\u003eSpecification\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  \u003ctr\u003e\n    \u003ctd style=\"border: 1px solid #f87c24; padding: 8px;\"\u003eSKU\u003c\/td\u003e\n    \u003ctd style=\"border: 1px solid #f87c24; padding: 8px;\"\u003eCYR020120430\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"border: 1px solid #f87c24; padding: 8px;\"\u003eVoltage\u003c\/td\u003e\n    \u003ctd style=\"border: 1px solid #f87c24; padding: 8px;\"\u003e24V \/ 48V\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;\"\u003eBattery Chemistry\u003c\/td\u003e\n    \u003ctd style=\"border: 1px solid #f87c24; padding: 8px;\"\u003eLithium (Li-ion \/ LiFePO4)\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"border: 1px solid #f87c24; padding: 8px;\"\u003eControl Type\u003c\/td\u003e\n    \u003ctd style=\"border: 1px solid #f87c24; padding: 8px;\"\u003eMicroprocessor-controlled\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;\"\u003e8719076022268\u003c\/td\u003e\n  \u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3 style=\"color: #f87c24;\"\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eOff-grid solar systems using a 24V or 48V lithium battery bank with a secondary lead-acid starter battery.\u003c\/li\u003e\n  \u003cli\u003eMarine installations where alternator output needs to charge a lithium house bank without direct alternator-to-lithium connection.\u003c\/li\u003e\n  \u003cli\u003eCommercial vehicles and motorhomes with split 24V or 48V battery systems.\u003c\/li\u003e\n  \u003cli\u003eHybrid battery setups where lithium and lead-acid banks must be isolated during discharge but combined during charging.\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 24\/48V 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 accredited installer familiar with lithium battery systems. The Cyrix-Li-Charge must be used in conjunction with a compatible lithium BMS; it does not provide cell-level protection independently. Ensure correct polarity and that all cabling is rated for the full 120A continuous load. For marine installations, follow applicable NMEA and flag-state wiring standards. Do not install in sealed, unventilated enclosures without confirming thermal ratings are met.\u003c\/p\u003e","brand":"Victron Energy","offers":[{"title":"Default Title","offer_id":59866753007950,"sku":"CYR020120430","price":61.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0796\/3698\/8238\/files\/VoltaconSolar_-_CYR020120430_-_Cyrix-Li-charge_24-48V-120A_intelligent_charge_relay.webp?v=1781200335","url":"https:\/\/voltaconsolar.com\/products\/victron-cyrix-li-charge-24-48v-120a-battery-isolator","provider":"VoltaconSolar","version":"1.0","type":"link"}