So, the previous owner replaced the gas/electric refrigerator with a 120V-only model. My old Dometic is still working right, so I don't have an excuse for this, but if you're going to go back to a refrigerator that can run without 120V, you might consider one with a Danfoss compressor like a Nova Kool. They aren't silent like the ammonia absorption units, but they cost a bit less and run well on 12V
power. They're also less sensitive to level, so they'll cool while you're traveling even if you park on a slope for a while, etc.
That's one of the things on my list for "someday" if my Dometic ever gives up the ghost.
Welcome again to the forum family and the Argosy sub-family. You probably know by now now much priceless knowledge and experience these people share... it makes life much easier for us newbies! (The ink isn't quite dry on the title transfer for my own Argosy purchase.)