agreed! the refrigerator is 110 volt which is supplied by the inverter when not connected to shore power. the inverter gets its input power from the 12 volt batteries. when driving the the engine alternator will supply 12 volts to recharge the batteries. just make sure the inverter is on when not connected to shore power. simply open a refrigerator door to see if a light comes on. if so, it's getting power.
2015 cardinal model 3825fl
2015 dodge ram 3500 dually