Split Charge Relay Wiring Diagram. Cable that has a minimum stranding of 35/0.3 (2.5 sq mm) should be suitable for the 12v feed from the battery to the relay. The relay outputs being for fridge, +12v permanent live (for internal 12v equipment or to charge caravan battery via relay in the caravan).
The relay will then switch in the alternator feed to the leisure battery to let it charge just like the vehicle starter battery. This is known as a split charge system. Cable with a minimum stranding of 16/0.2 (0.5 sq mm) should be enough for the earth.
Only for installation in 12v d.csystems where the vehicle chassis is the ground/negative (n/a to boats) 1.
I had a couple of choices: Only for installation in 12v d.csystems where the vehicle chassis is the ground/negative (n/a to boats) 1. Cable that has a minimum stranding of 35/0.3 (2.5 sq mm) should be suitable for the 12v feed from the battery to the relay. My choice of voltage sensitive split charge relay is a common unit.