Protecting your BOV

[Mortblanc]

I have used the shut off switches in several applications. They are handy when one wishes to isolate one battery in a multi-battery system for independent recharging.

I once kept a deep cycle battery in my Ford Ranger as a reserve battery and used it to power my RV when at home. I recharged it each day at work using a power pole that had a plug at its base. Pulled it up to the end of the RV each evening and plugged the caravan into the truck.

They are also useful when one finds a dead short in their system that drains power from the main battery. A dead short is often impossible to find, especially when dealing with an old vehicle that can have many worn and bare spots in the wiring.

Over here mechanics' hourly rates are from $75=up per hour and just a couple of hours chasing a dead short can eat up a budget.