Without more info about the solar panel, I'm gonna guess at this. You probably don't have enough panels (and it's undersized) to completely recharge your battery from normal use if dry camping. 1 panel is probably good enough to keep your battery up during storage. You have to take into account that it's spring, so the sun is lower on the horizon than summer which affects charging. With a panel lying flat, that will affect the amount of sun it gets (it should be tilted towards the sun). If there's clouds, that'll affect the panel's charging power. If the wiring's too small, that'll affect charging power. If you run lots of 12v items and/or lights that aren't led, that depletes the battery. Ultimately, you'll have to find a RV solar calculator to figure out how many panels/wattage you'll need. I'd call your dealer about the light. There
should be some sort of solar controller mounted somewhere and it might have indicators on it.
After writing this, I did find a Forum link-
http://www.keystoneforums.com/forums...ad.php?t=26238
Good luck!