20A Self Switching Dual Charge Relay

Combination relays are suitable for 12S electrics and will charge a caravan leisure battery and/or power the fridge, while the vehicle is running. It also protects the vehicle battery from drain when the engine is turned off. Combination caravan relay with automatic voltage monitoring and switches the power supply from car to caravan. Provides power for refrigerator and charges auxiliary battery. No separate signal wire necessary. Able to switch 20amp continuously when available from car's alternator/battery. Adjustable factory set voltage trip with narrow band hysteresis. Over temperature protection. Line voltage drop compensation. Low voltage drop (around 0.1v) at rated output. Made in the UK.