Greetings!
Let me start by saying that I think camper vans are too small for fulltiming with pets… I think motorhomes with lots of windows & more room are a much better choice.
For all intents & purposes, A/C is going to require either a generator or shore power. Forget solar, huge battery banks, etc; that’s for rich fools who like to tinker, not regular Joe’s.
An outdoor generator is huge theft risk too, much more so than a built in RV generator.
Cheers!
"Be the reason someone smiles today!" ~ Van_Dweller