Originally Posted by vandevsr
I've considered the propane. I'm wondering which is better, AC or DC? If someone knows whether DC uses the Peltier effect and the AC a compressor, even that helps, but I have no clue.
Neither type. These are absorption refrigerators. They work by heating an ammonia/hydrogen solution and allowing to circulate though the system absorbing heat from the interior of the refrigeration. There are no moving parts or a compressor.
Whether you use 120VAC, 12VDC or propane the refrigerator operates the same way. You are merely selecting a heat source.
Since you seem to be intent on electric 12VDC would be the least detrimental to the electric supply. At least you would avoid the losses incurred by the inverter.
However, I full well believe you will find your solar will not be able to keep up with the demand using this method. Take into consideration as well you don't want to deplete the batteries more than 50% if you can help it. Battery life takes a hit discharging below 50%.