Replacing a household refrigerator with an RV model would not be an easy task. RV models require a chimney for the propane fired ammonia boiler, this will require an outside wall vent and a rooftop vent. Running 12v and propane lines would be easy, the vents are what would require a lot of planning and work. Perhaps you could look at a more efficient refrigerator but even that would require a lot of work. Many household refrigerators would require removing the front windshield, the fridge is just to big to fit thru the door on most coaches.
Sorry, I know this probably isn’t what you want to read but these are the facts. In the long run it would be cheaper and easier to install the solar panels I know you don’t like. Wish I could have given you a better answer, hopefully someone else may have a better idea.
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