I think those have a fiberglass roof and end cap. Other than the vinyl trim as mentioned, I don't think there would be any issues. I would probably replace a couple things just for kicks. I don't know what battery converter it uses, but if it is a single stage, I'd chuck it and get a good three stage. Similar with the water pump -- if it is a single speed, I'd add an accumulator tank, or upgrade to a variable speed model. These are small things, but will make life easier on the road.
Of course, it is nice to add solar, a MPPT controller, and an inverter, but that can get expensive.