Shuts off the power in an emergency or when the boat is immobilized.
The "Dual Circuit" type, when it is in the ON position one battery powers the consumptions & the other the engine.In the combine position it is combined with the automatic charging relay, so the engine gives or takes power from the most charged battery or both.The "1-2-BATTERY" type, allows the charging of each battery or both batteries together, as well as supplying power to start the engine from one or both batteries in case of emergency.
