Your assessment is probably accurate but, your not considering the weak part of the equasion...that being the number of batteries. Two six volt batteries would indeed be very marginal in providing the storage needs of that frig and the other dry camping items, lights, tv satellite etc. If the owner doubles the battery capacity, then he would be in a better position to run the frig off of battery power.
hershey - albuquerque, nm
Someday Finally Got Here
My wife does all the driving - I just get to hold the steering wheel.
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Expedition - Chevy Equinox