Split Charge Relay Circuit Diagram

Protecting your split charge circuit.

Split charge relay circuit diagram.

One should go in between the lead that goes from the starter battery to the split charge relay and one between the split charge. Fit a fuse to one of these cables rated. Have a look at the diagram above to see the basic wiring diagram of your voltage sensed split charge kit. Ensure this cable is thick enough to carry the maximum charging current of your alternator.

A 12 volt relay often called a manual split charge relay is an electronic device that uses an electromagnet to pull a set of contacts that make or break a circuit. This is how you can install your split charge relay. A 12 volt relay is the same type of relay that you would find in many 12 volt electrical systems. The other and much easier method is to use a volt sensing circuit which detects a rise in voltage when engine running and energises the coil of a split charge relay to charge the leisure battery.

Most kits will also come with the instructions so you should already have a ruff idea on what needs to be done. Whatever split charge system you opt for the most important aspect is to ensure that all connecting cables are protected by appropriately rated fuses to prevent an electrical fire. Each battery that connects into the split charge device should have an appropriately rated fuse installed in line with the. How does a 12 volt relay work.

The relay will then switch in the alternator feed to the leisure battery to let it charge just like the vehicle starter battery. I have left boxes on the diagram on the left to help you with your measurements. Fit the 2 fuses in the fuse holders.