You have two types of power in your RV. 120 volt AC and 12 volt DC. 12 volt dc is from battery/converter. Water pump, lights, thermostat, heater, fans ,RV reefer if propane/electric , the c control panel for reefer. 120 AC is for air cond. microwave, converter to charge batterys,water heater, tv and outlets. You get 120 volt from either the camp ground or a generator. So with out 120ac only 12 volt side works.
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2012 SunSeeker 3100SS Toad-1962 Futura Average 100 + days camping
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