You probably have an inverter, that will keep your refer going as long as the batteries are charged and hold a good charge. The inverter takes 12v power and turns it to 120v ac, but does take a toll on the batteries if they are not good ones. A lot of the new units came with Harris batteries, and in most cases just don't last very long and have to be replaced. Hope this helps
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Jerry and Debbie
2015. Hurricane 32N /Kia Soul toad
Retired
Crawfordville Fl. Vietnam Vet.
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