For those with Vintage Motorhomes, not that "vintage" matters, I'm just completing and testing my solar project. The basic ingredients are four 100 watt solar panels, four 6-volt GC2 deep cycle batteries wired to produce 12 volts and 440ah, and a 60A Morningstar MPPT charge controller. I have fairly well documented the project on our blog... Chasing Sunrises and Sunsets | Preparing for a Full-time RV Lifestyle
On any page, just click on "Solar Project" in the upper right area, under the header photo. I don't guarantee that I have done everything correctly, but I have sure learned a lot and it seems to be working.
Shoot any questions to me and I will try to answer them. I am NOT an electrician, but I HAVE acted as one while staying at a Holiday Express.