Battery Isolator for 12V 4WD Secondary Battery VSR Voltage Sensitive Relay
Battery Isolator for 12V 4WD Secondary Battery VSR Voltage Sensitive Relay
Battery Isolator for 12V 4WD Secondary Battery VSR Voltage Sensitive Relay
Battery Isolator for 12V 4WD Secondary Battery VSR Voltage Sensitive Relay
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Battery Isolator for 12V 4WD Secondary Battery VSR Voltage Sensitive Relay

Regular price
$64.49 NZD
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$64.49 NZD
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Voltage Sensitive Relay (VSR) Secondary Battery Isolator for 4WD and Marine applications.

This device allows you to install a secondary battery in your vehicle for running auxiliary devices such as fridges and lighting. Ideal for 4WD, Marine, Caravan, Campervan and Solar applications. While your engine is running, the VSR detects that the alternator is running (voltage is above 13.3V) and allows your secondary battery to charge. When your engine is off (voltage is below 12.8V) the VSR isolates the secondary battery, which prevents your auxiliary devices from draining your starting battery. This can be used instead of a DC-DC battery charger, and would work for a deep cycle battery in a 4WD or boat.



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