Forgive me as I'm new and looking for my first TT. But does this mean that while towing the fridge will not work? If it runs on propane shouldn't it always be working?
Many smaller popups, that have very small fridges, can fun on 12VDC while going down the highway, in addition to running on 110VAC and propane (i.e., 3-way). However, the larger fridges in TT's are too big for running on 12VDC, thus they are only 2-way, 110VAC and propane.
If your fridge will run on propane, then you can run it driving down the road. The issue with that, though is that you've got to have the propane valved in while driving down the road, which is seen by about 50% of those of us on the forum as a negative safety concern, while the other half don't seem to mind and do it all the time.
You'll have to judge for yourself.
Running it on an inverter, IF your TV alternator can keep up, would be a safer option than using the propane, hence the reason someone would like to do it. It's a big IF, though. If 12VDC is too much of a current draw for a larger fridge, then using the 12VDC to run an inverter, which will ultimately need the same amount of power for the larger fridge, (plus losses in the inverter) also isn't going to work.