Most important is to choose an "RV" installer. One that will look at your usage, get up on roof to determine how many panels and of what wattage. You can waste alot of money on solar. And there are alot of people out there with some whacky ideas and they love to share them. Find a reputable installer, preferable one who either handles no products directly or has easy access to all as we do as consumers. In other words "no loyality". I'm just getting solar installed myself in Phoenix. Going full time im May.