Voltage Sensitive Split Charge Relay 140A

Excellent piece of kit for adding on a leisure or domestic battery to a vehicle conversion.
This allows the main starter battery to be charged first and once the starter battery is over a certain voltage it will divert charge to the secondary/auxilliary battery charging it while you drive.
Useful in Camper conversions, Work Vehicles, 4x4 Vehicles with a winch battery and anything that once to charge a secondary battery while driving.

Not suitable on new vehicles with smart alternators, if unsure please check with the vehicle manufacturer.