I encourage those considering solar for their RV to do a lot of reading from sources other than those trying to sell you something. Forums are ok for some information however there's a LOT of misinformation to weed through. If possible talk to people that actually operate off-grid with their RVs more than a weekend here and there
One thing I learned from this is that most fail miserably with their first solar venture.
I don't have many saved solar links for RVs but here's one that might be worth reading:
RV Electrical