The inclusion of a second battery in your car, 4wd or boat enables you to power your electrics without flattening your main starter battery when the engine is off.

Applications include us with 12V fridge/freezer,  boat cabin lighting, truck, ute or 4wd with an inverter powering various powered items.

This Voltage Sensitive Relay (VSR) kit provides everything you need to wire up your second battery, while handling the isolation during shut-off periods.

It comes with marine-grade hardware so it can be used on a boat or vehicle.

Suitable for 12V systems with a continuous rating of 140A.

All wiring hardware and instructions included.

Note: additional black (negative) wire may be required for systems without chassis earth, such as fibreglass boats, depending on your installation.