I do a lot of forest service and state park campgrounds, which usually means no hookups but water close by.

I have a small portable flexible style solar panel. It hooks right into the Furrion port, but many brands need a small adapter. That's what the port is designed for! Not long after I got it I moved the charger inside, just so I don't have to think about it. That was all with my original lead acid batteries. It worked great, except for the trees. But that's why I got a portable unit it moves to the sun.

Just this spring I went to Lithium that I moved under my steps. It involved reworking most of the 12V feed. I can give you details but probably better for you to ask questions. (and read many of the solar and battery discussions here) I'm going out this weekend for the first time, but I'm confident it will all work together. I can't see any further power upgrade as my rig is 50A. If yours isn't, upgrading can be expensive and only useful if you often run 2 AC units.