Battery Isolator Switch - 12 - 60 V - 275 A Over time, the electrical components in your caravan or boat slowly but surely drain the power from your supply battery. Especially when the vehicle is left to sit on land or in the water and the battery isn't recharged by the engine for long periods of time, the power circuit should be interrupted during these down times. The battery isolator switch from MSW easily and effectively interrupts the voltage and protects the battery. High-performance isolator switch for 275 A continuous operation and 1,250 A starting current High-quality, corrosion-resistant, tin-plated copper contacts Also safe for petrol-powered engines thanks to spark protection Suited for power supplies of 12 - 60 V DC Easy to use thanks to clear function options On / Off