Seller notes

12V 140A Smart Waterproof Dual Battery Isolator Car Voltage Sensitive Relay How does it work?1 When the engine is started and the voltage of the start battery reaches 13.3 volts, the VSR engages, allowing two battery banks(start and house) to be charged simultaneously. The indicator (LED) is on.2 When the voltage of the start battery drops below 12.8 volts (eg the engine is stopped), the VSR disengages, separates the batteries.The indicator (LED) is off. It can protect your start battery from be...

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