Marine Battery Relays

Browse our range of Cristec RCB+ smart battery couplers for sharing alternator output between the starter battery and a lithium or lead service bank while protecting engine-start capacity. The RCB-ADJ-120A gives adjustable current limiting from 30A to 120A, with fixed 50A and 80A models also available for 12V or 24V systems. All are fanless, ignition-protected and rated for −25°C to +65°C, with reverse-voltage protection and a remote on/off input.