Description
Tandem (Double ) combination relay, Towing Electrics TEC2
Caravan or Combi or Split Charge Relays switch current to the caravan’s leisure battery and/or fridge during towing, but in order to protect the car’s battery, become open circuit when the engine is switched off. They may be ignition controlled, requiring a separate signal wire connected from the ignition switch to the device, or they may switch automatically, with an electronic circuit within the device remotely sensing the state of the car’s alternator/battery, and only switching when sufficient current is available.
