The problem with running my fridge on propane is that it won’t stay lit reliably. I’ve spent an unbelievable number of man hours and $$ trying to solve the problem, but I’ve only been able to improve its reliability somewhat. It still gets blown out often enough at hiway speeds that the fridge gradually gets warmer. It works fine on LP the rest of the time.
At some point I threw up my hands and went at the problem from a different direction. For several years I was running the fridge from an inverter, which worked very well in my older trucks. With my current truck, because of the “smart” charging system it has, the alternator was no longer keeping up with the draw from the inverter, so again I had to do something else. For me, the something else was a DC-DC charger.
Improving the charging performance from the truck’s alternator also has other benefits to anyone who spends a portion of nearly every day on the road, and doesn’t want to be limited to campgrounds with hookups every night
:):)