It's hard to make too many good recommendations (or even not so good recommendations) without a little more information on what sort of an RV you have, what generator (if any) you currently use, what your battery bank is like, what loads you need to power, and perhaps also what converter you have.
If it's only short spans of dry camping (a couple nights at a time, say), it may be most effective to upgrade the battery bank if you're rather limited there. For regular 12V loads, but not for air conditioning or extensive microwaving or similar things, solar has a bunch of advantages over a generator. Naturally, solar is more effective in some climates and campground settings than others. (It's not particularly valuable for winter camping in Alaska or Iceland, for instance.)