Cargo Split Charge Relay Wiring Diagram

Make sure to read out our full article where we cover all different split charge methods available for a campervan.

Cargo split charge relay wiring diagram.

Have a look at the diagram above to see the basic wiring diagram of your voltage sensed split charge kit. A super simple wiring diagram on how a split charge device directs power towards the leisure battery one it has been engaged. I have left boxes on the diagram on the left to help you with your measurements. This system uses a heavy duty version of a simple make and break relay the coil of which is energised by a signal that is only 12v when the engine is running usually the charge signal wire from the alternator.

Ensure that both battery banks and the alternator share a common negative connection. To fit a split. A typical campervan split charging system has a device that connects the battery used to start the engine to the leisure battery when the engine is running. Existing wiring not shown for clarity.

The brown pin 5 in most cases is not used when wiring tow bar electrics and it is important to ensure that the white pin 3 cable is earthed. In some cases a split charge relay might be needed in order for the power to switch divide from charging a leisure battery and the car battery. Split charge relay domestic battery alter nator 86 30 85 87 to charge fuse warning light f d 16 sqmm cables 2 5 sqmm cables important.