The Blue Sea Systems Add-A-Battery Dual Circuit System is a complete two battery bank solution that automates charging and simplifies switching. It includes the Dual Circuit Plus™ Battery Switch and the Automatic Charging Relay, which are designed to work together seamlessly.

The Dual Circuit Plus™ Battery Switch simplifies switching and isolates the engine and house circuits. It also allows you to combine battery banks for emergency starting. The tin-plated copper studs ensure maximum conductivity and corrosion resistance.

The ACR Automatic Charging Relay automatically combines battery banks during charging and isolates them when discharging or starting engines. It shares the charge between two batteries more efficiently than a battery isolator, which allows for efficient dual battery charging without needing regulator adjustment or rewiring.

With the Blue Sea Systems Add-A-Battery Dual Circuit System, all you need to do is turn the battery switch ON when you arrive and OFF when you leave. It's as simple as flipping an ON-OFF switch, yet it effectively manages the switching and charging of two batteries from a single charge source.