Seaflo Marine DC Battery Selector Switch 3 Position 300 Maximum Amp for 6-32V System Off - complete disconnect of both batteries or banks of batteries 175A continuous duty at DC-12V, 300A intermittent duty at DC-12V Suitable for 6v, 12v, 24v, and 32v ship's supply system Dimension: 5.27" (length) x 3.03" (height) x 5.27" (width) The selector switch will allow the use of one battery for engine starting and one battery for auxiliary electrical equipment