Why run solar?
Because half of my RV runs off the 12V system and having solar charge that system is like peanut butter and jelly. I don't have to touch a thing (other than electrolyte maintenance) and solar charges the batteries when boondocking or while in storage.
FWIW, I run a small 120V fridge, all my entertainment devices, and the typical 12V items off 235W of solar and 300 AH of capacity. The only thing I wish for is to have more of both so I can run more stuff. That may come about in the future.