Originally Posted by 2 Trail Hikers
All we are looking to do is replenish the battery when we are out in areas with no shore power hook up. We can use the onboard generator to charge them but i prefer the quiet sound of solar.
Obviously, how much solar power you end up needing depends greatly on how much energy you need to "replenish" back into your battery.
If the system is limited to a single typical RV battery, then you're limited to around 50 Amp-hours a day, maybe a little more if you let battery run down lower. If so, that's only around 600 watt-hours per day of useable energy, which isn't that much.
I expect that once most owners have a system up and running, they find they'll use it more than originally planned. For that reason I would engineer components and wiring as if you were going to replenish a couple of large batteries from 50% depth of discharge at a minimum.