A voltage sensitive relay (VSR) is the best way to ensure you can always get your dual-battery vehicle started. If the radio stops working that’s one thing, but if you’re stranded because your car cannot start because you ran your fridge for too long, that’s potentially a life and death scenario. It allows two batteries to be charged from your alternator. Once your main starter battery is sufficiently charged, it will begin charging the second battery too.
- Protects your starter battery
- Automatic operation
- Ideal for 4WD, marine, and more
Current Rating: 125A
Voltage Rating: 12VDC (15VDC Max)
Cut-In Voltage: 13.3VDC
Cut-Out Voltage: 12.8VDC