Victron Energy Cyrix-Li-ct 12/24V-230A Battery Combiner

Intelligent Microprocessor-Controlled Alternator Charging and Dual Battery Isolation: The commercial-grade Victron Energy Cyrix-Li-ct 12/24V-230A Intelligent Li-ion Battery Combiner (CYR010230412) is a heavy-duty, smart bidirectional relay engineered to automatically manage battery charging loops between an engine starter battery and a lithium house bank. Rated for 230A continuous current and a robust 500A cranking capacity, this advanced combiner serves as a superior replacement for restrictive diode isolators by operating with virtually zero voltage loss. This ensures that your alternator or shore charger supplies precise voltages without requiring alternator output adjustments. Designed specifically to work in harmony with external Battery Management Systems (such as the VE.Bus BMS), the Cyrix-Li-ct automatically links the batteries in parallel when it senses a charging voltage above 13.4V (or 26.8V) and disengages immediately if the BMS control output becomes free-floating due to cell over-voltage or over-temperature conditions, making it an essential protection layer within advanced lithium power systems. Outfitted with built-in transient voltage suppression to safely clamp sudden disconnection voltage spikes and an integrated temperature-controlled safeguard ("ct") against overheating, this auto-ranging IP54 unit includes an optional manual Start Assist function to close the relay for 30 seconds during an emergency. It delivers code-compliant, bidirectional charge coordination to secure and optimize configurations built with premium LiFePO4 lithium batteries, whether running on high-capacity 12V lithium batteries or high-efficiency 24V lithium batteries.