Battery switch that allows the charging of each battery or both together, as well as the power supply for starting the engine from one battery or from both in case of emergency.

The "Dual Circuit" type cuts the power in emergency situations or when the boat is immobilized.

In the combine position, it works in conjunction with the automatic charging relay, so the engine draws from or feeds power to the most charged battery or both.

The "1-2-BOAT" type allows for battery switching without interrupting the power supply.