{"product_id":"victron-cyrix-li-intelligent-charge-relay-12-24v-1","title":"Victron Energy - 12\/24V - Cyrix-Li Intelligent Charge Relay 12\/24V-120A","description":"\u003ch2\u003eVictron Cyrix-Li-Charge 12\/24V-120A: Intelligent Charge Relay for LiFePO4 Battery Systems\u003c\/h2\u003e\n\u003ch3\u003ePrecision Charge Control for Lithium Battery Protection\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eVictron Cyrix-Li-Charge 12\/24V-120A\u003c\/strong\u003e is a specialised \u003cstrong\u003eintelligent charge relay\u003c\/strong\u003e designed to integrate seamlessly with \u003cstrong\u003eVictron VE.Bus BMS\u003c\/strong\u003e and \u003cstrong\u003eLiFePO4 lithium batteries\u003c\/strong\u003e. It acts as a critical secondary protection layer, automatically connecting and disconnecting charging sources to prevent \u003cstrong\u003ecell overvoltage\u003c\/strong\u003e and \u003cstrong\u003eover temperature\u003c\/strong\u003e conditions. Unlike generic relays, the Cyrix-Li-Charge responds instantly to BMS signals, ensuring your expensive lithium battery bank remains within safe operating limits at all times.\u003c\/p\u003e\n\u003cp\u003eEngineered for \u003cstrong\u003e12V and 24V DC systems\u003c\/strong\u003e, this relay handles continuous currents up to \u003cstrong\u003e120A\u003c\/strong\u003e, making it suitable for high-power chargers and alternators. Its intelligent logic monitors both the BMS control input and battery voltage, providing automated reconnection only when conditions are safe. This reduces the risk of battery damage from faulty chargers or unexpected voltage spikes, a common issue in mobile and off-grid installations.\u003c\/p\u003e\n\u003ch3\u003eHow the Cyrix-Li-Charge Protects Your Investment\u003c\/h3\u003e\n\u003cp\u003eIn a Victron lithium system, the VE.Bus BMS serves as the primary safeguard. However, not all chargers can be directly controlled by the BMS. The Cyrix-Li-Charge bridges this gap by acting as a controllable switch. When the BMS detects an imminent \u003cstrong\u003ecell overvoltage\u003c\/strong\u003e or \u003cstrong\u003ehigh temperature\u003c\/strong\u003e (above 50°C), it sends a signal to the Cyrix, which disengages immediately—cutting off the charging source within milliseconds. This rapid response prevents thermal runaway and extends battery lifespan.\u003c\/p\u003e\n\u003cp\u003eAfter disconnection, the relay intelligently manages reconnection. It waits for the BMS signal to return high and verifies that the charger output is above 13.7V (12V system) or 27.4V (24V system). A 3-second delay ensures stability before re-engaging. If repeated faults occur, the delay extends to 10 minutes, preventing rapid cycling that could stress system components. Additionally, if battery voltage drops below 13.5V (27V for 24V) for an hour, the relay disengages to avoid unnecessary drain.\u003c\/p\u003e\n\u003ch3\u003eKey Features at a Glance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstant BMS-driven disconnection\u003c\/strong\u003e for overvoltage and over temperature protection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e120A continuous rating\u003c\/strong\u003e at 12V\/24V, with 40A breaking capacity at 48V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomatic reconnection logic\u003c\/strong\u003e with progressive delays to prevent cycling\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow power consumption\u003c\/strong\u003e (\u0026lt;4mA when open) ideal for energy-conscious systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact, robust design\u003c\/strong\u003e (46x46x80mm, 0.11kg) with IP54 protection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt-in transient voltage suppression\u003c\/strong\u003e to protect against inductive spikes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClear status LED\u003c\/strong\u003e for quick operational diagnostics\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSeamless Integration with Victron Energy Systems\u003c\/h3\u003e\n\u003cp\u003eThe Cyrix-Li-Charge is purpose-built for Victron's ecosystem, connecting directly to the VE.Bus BMS control output. It requires a minimum of 2V on its battery terminal to operate, ensuring it remains open if accidentally disconnected from the battery—a safety feature that prevents uncontrolled charging. The relay's \u003cstrong\u003e3\/8\"-16 (Approx. M10) stud terminals\u003c\/strong\u003e accommodate heavy-duty lugs up to 4\/0 AWG (approx. 95mm²), ensuring secure, low-resistance connections for high-current applications.\u003c\/p\u003e\n\u003cp\u003eFor installers, the integrated mounting tabs and pre-drilled holes simplify fixed installations in battery compartments, engine bays, or electrical cabinets. The IP54 rating provides protection against dust and water splashes, making it reliable in marine, RV, and off-grid environments where conditions can be harsh.\u003c\/p\u003e\n\u003ch3\u003eApplications: Where Precision Charging Matters\u003c\/h3\u003e\n\u003cp\u003eThis relay is essential for any Victron lithium setup where charging sources cannot be directly managed by the BMS. Typical use cases include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMarine and RV electrical systems\u003c\/strong\u003e with high-output alternators or shore power chargers\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOff-grid solar installations\u003c\/strong\u003e using MPPT controllers that lack BMS communication\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBackup power systems\u003c\/strong\u003e where generator or grid chargers need automated disconnect\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustrial battery banks\u003c\/strong\u003e requiring fail-safe charge termination\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eBy isolating the charger during fault conditions, the Cyrix-Li-Charge prevents overcharging that could lead to cell degradation or safety hazards. It also eliminates the need for manual intervention, allowing unattended systems to operate safely.\u003c\/p\u003e\n\u003ch3\u003eWhy Choose the Cyrix-Li-Charge Over Generic Relays?\u003c\/h3\u003e\n\u003cp\u003eStandard automotive relays lack the intelligence to interpret BMS signals or monitor voltage thresholds. They simply switch on or off, offering no protection against overvoltage or temperature extremes. The Cyrix-Li-Charge, in contrast, actively communicates with the BMS and applies conditional logic to ensure charging only occurs when safe. This reduces the risk of battery failure, which can be costly and dangerous in lithium systems.\u003c\/p\u003e\n\u003cp\u003eAdditionally, the built-in transient voltage suppressor protects against voltage spikes that occur when the relay disconnects under load—a common cause of contact welding in inferior relays. This extends the relay's operational life and maintains system integrity.\u003c\/p\u003e\n\u003ch3\u003eInstallation and Compatibility Notes\u003c\/h3\u003e\n\u003cp\u003eThe Cyrix-Li-Charge is designed for use with \u003cstrong\u003eVictron LiFePO4 batteries\u003c\/strong\u003e and the \u003cstrong\u003eVE.Bus BMS\u003c\/strong\u003e. It is not a standalone battery protect device; for load disconnection, consider the Victron BatteryProtect. Always ensure proper fusing and cable sizing according to system current. The relay's control input engages when high (approx. battery voltage) and disengages when free-floating or pulled low, making it compatible with standard BMS outputs.\u003c\/p\u003e\n\u003cp\u003eFor systems requiring combined charging and load control, the Cyrix-Li-ct (battery combiner) or Cyrix-Li-load (load disconnect) variants may be more appropriate. Contact our team for assistance with system design if you're unsure which model suits your application.\u003c\/p\u003e\n\u003ch3\u003eSecure Your Lithium Battery System Today\u003c\/h3\u003e\n\u003cp\u003eProtect your investment with the \u003cstrong\u003eVictron Cyrix-Li-Charge 12\/24V-120A\u003c\/strong\u003e. Whether you're upgrading an existing installation or building a new off-grid power system, this intelligent relay provides the precision control needed for safe, reliable lithium charging. \u003cstrong\u003eOrder now\u003c\/strong\u003e to ensure your battery bank operates within safe limits, every cycle.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable class=\"product-specifications\" style=\"width:100%; border-collapse:collapse; border:1px solid #d9d9d9; table-layout:auto;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #d9d9d9; padding:8px; text-align:left; width:35%; vertical-align:top;\"\u003eModel\u003c\/th\u003e\n\u003ctd style=\"border:1px solid #d9d9d9; padding:8px; vertical-align:top;\"\u003eCyrix-Li-Charge 12\/24-120\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #d9d9d9; padding:8px; text-align:left; width:35%; vertical-align:top;\"\u003eSystem Voltage\u003c\/th\u003e\n\u003ctd style=\"border:1px solid #d9d9d9; padding:8px; vertical-align:top;\"\u003e12\/24 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #d9d9d9; padding:8px; text-align:left; width:35%; vertical-align:top;\"\u003eContinuous Current And Breaking Capacity At 12 V Or 24 V\u003c\/th\u003e\n\u003ctd style=\"border:1px solid #d9d9d9; padding:8px; vertical-align:top;\"\u003e120 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #d9d9d9; padding:8px; text-align:left; width:35%; vertical-align:top;\"\u003eBreaking Capacity At 48 V\u003c\/th\u003e\n\u003ctd style=\"border:1px solid #d9d9d9; padding:8px; vertical-align:top;\"\u003e40 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #d9d9d9; padding:8px; text-align:left; width:35%; vertical-align:top;\"\u003eConnect Delay\u003c\/th\u003e\n\u003ctd style=\"border:1px solid #d9d9d9; padding:8px; vertical-align:top;\"\u003e3 s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #d9d9d9; padding:8px; text-align:left; width:35%; vertical-align:top;\"\u003eConnect Voltage\u003c\/th\u003e\n\u003ctd style=\"border:1px solid #d9d9d9; padding:8px; vertical-align:top;\"\u003e13.0 V (12 V), 26.0 V (24 V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #d9d9d9; padding:8px; text-align:left; width:35%; vertical-align:top;\"\u003eMinimum Battery Terminal Voltage\u003c\/th\u003e\n\u003ctd style=\"border:1px solid #d9d9d9; padding:8px; vertical-align:top;\"\u003e2 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #d9d9d9; padding:8px; text-align:left; width:35%; vertical-align:top;\"\u003eControl Input\u003c\/th\u003e\n\u003ctd style=\"border:1px solid #d9d9d9; padding:8px; vertical-align:top;\"\u003eEngages when the control input is high (appr. battery voltage); disengages when the control input is left free floating or pulled low.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #d9d9d9; padding:8px; text-align:left; width:35%; vertical-align:top;\"\u003eCharger Check Interval When Engaged\u003c\/th\u003e\n\u003ctd style=\"border:1px solid #d9d9d9; padding:8px; vertical-align:top;\"\u003e1 hour\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #d9d9d9; padding:8px; text-align:left; width:35%; vertical-align:top;\"\u003eCurrent Consumption When Open\u003c\/th\u003e\n\u003ctd style=\"border:1px solid #d9d9d9; padding:8px; vertical-align:top;\"\u003e\u0026lt;4 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #d9d9d9; padding:8px; text-align:left; width:35%; vertical-align:top;\"\u003eProtection Category\u003c\/th\u003e\n\u003ctd style=\"border:1px solid #d9d9d9; padding:8px; vertical-align:top;\"\u003eIP54\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #d9d9d9; padding:8px; text-align:left; width:35%; vertical-align:top;\"\u003eWeight\u003c\/th\u003e\n\u003ctd style=\"border:1px solid #d9d9d9; padding:8px; vertical-align:top;\"\u003e0.11 kg (0.24 lbs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #d9d9d9; padding:8px; text-align:left; width:35%; vertical-align:top;\"\u003eDimensions (H x W x D)\u003c\/th\u003e\n\u003ctd style=\"border:1px solid #d9d9d9; padding:8px; vertical-align:top;\"\u003e46 x 46 x 80 mm (1.8 x 1.8 x 3.2 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e","brand":"Victron","offers":[{"title":"Default Title","offer_id":52364356321563,"sku":"Vic-CYR010120430","price":114.95,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0854\/3354\/9083\/files\/Vic-CYR010120430-01.jpg?v=1781658047","url":"https:\/\/www.nbcampingequipment.com.au\/products\/victron-cyrix-li-intelligent-charge-relay-12-24v-1","provider":"NB Camping Equipment","version":"1.0","type":"link"}