The main thing with solar is to consider what all you want to power and then figure out how much battery and solar you would need to power those loads for the amount of time you would want. As mentioned above, ACs are pretty much a no go unless you spend $$$ for a lot of panels, lithium batteries and big inverters.
For our trailer, I primarily wanted to be able to run the furnace and lights for ~12-14 hrs off of the battery. I installed 2 6V 230AH golf cart batteries for storage, a 20A output MPPT solar controller and have 2 100W solar panels. I will probably add a 500 W pure sign wave inverter to be able to power a couple of AC outlets. It really won’t be able to do much other than power a laptop and TV but that’s about all the AC loads I would like run off off batteries anyway. The microwave would be nice but most take a 1.5-2K inverter to get it started and those are a bit more expensive that I would want to spend.
Solar Powered RV’s and Boondocking is a good FB group if you are considering adding solar to your RV and want to see some installations and ask questions.