Main Power Switch For Boat Truck BATTERY SWITCH 12-48V Master Switch Disconnect Isolator For Car Vehicle 12V 24V 48V Battery Switch The internal connectors are made of galvanised copper, which has better conductivity. Nilight 1 2 Both Off Battery Switch, 12V 48V Disconnect Master Cutoff Switches for Marine Boat Car RV ATV UTV Vehicle, Waterproof Heavy Duty Isolator. $15.99 Easy to use: the power switch is clearly marked in color, making it easy to identify and operate. 12 v Battery Isolator by Switch Boss Product Specifications Rated Voltage: 12-48V Continuous Power: 275A Intermittent Power: 455A Starting Power: 1250A The rated current of the switch is 275A. 12 v Battery Isolator by Switch Boss The green area (ON) is the power switch, the red area (OFF) is the off switch.