Cyrix-Li-charge 12/24V-120A intelligent charge relay

The Victron Energy Cyrix-Li-Charge 12/24V-120A (CYR010120430) is a microprocessor-controlled heavy-duty relay designed specifically for lithium (LiFePO₄) battery systems. Working in conjunction with the VE.Bus BMS, the Cyrix-Li-Charge intelligently connects and disconnects battery chargers based on battery voltage and BMS control signals. This ensures safe charging of lithium batteries by preventing overvoltage and overtemperature conditions. The relay automatically connects batteries in parallel when charging voltage is detected, and disconnects when voltage drops below the float level. Unlike diode isolators, there is virtually no voltage loss across the relay, so alternator or charger output voltages do not need to be increased. Rated at 120A continuous current for 12/24V systems, the Cyrix-Li-Charge is suitable for most single-alternator vehicle installations with lithium house batteries. A higher-rated 230A version (CYR010230430) is available for larger installations.