What you probably need more than a design is a set of links to information and actual components that are available and best for mobile applications (RVs), *but that might look like advertising here* (though I’ll get no pecuniary benefit at all out of it). I’ll try to remember to make a list of links to a vendor site that also help with technical details and send them in a more private message tomorrow afternoon. If you don’t see the links before sundown, feel free to remind me.
I can also include a few general, rough design tips (sizing and the like), but I’ll need to know what part of the world or part of the country you’re in and a rough guess on sun days per year for the location. Send a private message about that.
Actually I was specifically interested in your installation. I have books, links, and suppliers, but each install varies with location, and amount of off grid desired. Yours would be somewhat unique as you are completely off grid but you might still be limited in usage and you might be all DC or you might be using inverters and what is your backup position? All of that is of interest to those who watch the development of solar as the prices continue to improve.