Our absorption fridge consumed 4 gallons of propane in 5 days of driving. I’m not sure if it was wind from the vent pipe swirling around and decreasing the efficiency or if it was the driving motion that shook up all the plumbing but unless sitting still, our fridge used an unacceptable amount of propane.Absorption refrigeration is designed for use with propane off-grid, typically in RVs. They typically have a 120VAC electrical heating element for use when shore power is available and sometimes a 12VDC element while driving. The fridges do not use much propane at all. Propane is cheap, easy and available for most people.
Add to that the fact that we needed to remove the absorption fridge and roll it around every year or two to ‘burp’ it, and the maintenance was more trouble than it was worth.
Going to a Danfoss compressor unit now allows us to boondock indefinitely since we purify our own water and bring lye and a post hole digger to avoid using the black tank on trips longer than a couple weeks.