Solar Panels (why are people going small?)

I am not sure solar is the answer to power large draws like multiple AC's. I just don't think the power is there. More to the point, solar doesn't really supply the power, it charges the batteries which supply the power. Large high end coaches like MM's Prevost have HUGE battery banks and can run AC's off of them but these banks are EXPENSIVE, and heavy and take up a lot of space. I am also not sure lining your entire roof with solar panels is a good idea. How will you get on the roof to fix anything or the annual check and caulk? I like solar, don't get me wrong, it's a cheap way to get power, but it takes a lot of panels to produce a lot of power.