A Honda or Yamaha 1000 generator is pretty light, and easy to cary and stow. It’s also more than enough to run a 45-50 amp multi-stage battery charger. I have a built in Generac 3600 LP generator In my TC that I rarely ever use, and a Yamaha 1000 that I use all the time (no solar).
I also have a Redarc DC-DC charger that allows the truck alternator to supply up to 25 amps of DC power to the camper whenever the engine is running. That’s more than enough to keep the camper battery fully charged, and run the fridge in DC mode while driving.
:):)