Marinco Digital Voltage Sensing Relay (VSR) Battery Selector Switch Single Engine/Two Battery Banks

Switch system uses dual voltage sensing relays (VSR's) to ensure you will always have a fully charged reserve battery. When the switch is in position 1 it becomes the sensing battery for the VSR. Battery 2, which is in isolation, will be charged via the VSR ensuring it is always fully charged. When the switch is in battery 2 position this becomes the sensing battery and battery 1 is charged via the VSR.