30 AMP DUAL CHARGE RELAY SELF SWITCHING

Description
Reviews

This charging relay is designed to work with 12S applications and will charge an auxiliary battery, and power an auxiliary unit like a fridge, whilst the towing vehicle is running. This also means it will protect the towing vehicles battery when the vehicle is switched off.

Combination caravan relay with automatic voltage monitoring and switches the power supply from car to caravan
This relay senses voltage with self switching capabilities
Charges a secondary battery and can power aux units such as a fridge
Always monitors vehicle voltage
Separate signal wire not needed
Able to switch up to 30 amp continuously when available from car’s alternator/battery
Over temperature protection
Line voltage drop compensation
Low voltage drop (around 0.1v) at rated output

FAQ from Manufacturer
What's the purpose of the plastic philips screw head that is visible through the hole on top of the TEC3M relay?

The TEC3M will change its state dependant on the standing voltage of the battery onto which it is connected. Under factory set condition, whilst the vehicle engine is running the relay expects to see a voltage exceeding 13.5V; when this voltage is reached and maintained it will change its state to a closed condition, suppling voltage to the auxiliary unit.

When the voltage of the vehicle battery falls below 12.9V will it disengage the supply, so on a vehicle with a healthy battery it is normal to see the supply maintained to auxiliary source for a period of time after the engine is switched off.

Adjusting the pot on the top of the device will vary the voltage the unit opens and closes the relay contacts.