Blue Sea Add-A-Battery

The Blue Sea Add-A-Battery system is an essential solution for vehicle owners, weekend warriors, and mechanics who require dependable auxiliary power for modern automotive electronics. This dual-battery setup is ideal for running auxiliary lighting, winches, high-draw audio systems, or preparing for extended off-grid adventures without draining the primary starting battery.

Engineered for trucks, SUVs, overlanding rigs, and expedition vehicles, the Add-A-Battery system prevents dead batteries and ensures uninterrupted power to critical accessories. Its intelligent isolator system employs voltage-sensitive relay technology to automatically disconnect the auxiliary battery when engine RPM drops below safe thresholds, safeguarding the vehicle's starting capacity while allowing simultaneous charging of both battery banks during operation.

This compact, sealed design is capable of handling high-amperage loads without corrosion or terminal degradation, making it a favorite among mechanics and modification enthusiasts for custom build-outs. Whether for heavy-duty recovery vehicles, camper builds, or dual-battery setups, the Add-A-Battery system integrates seamlessly into existing electrical architectures with minimal modification.