I have been looking at these solar powered battery maintainers to keep my system up and running while in the party cove. I do a trickel charge every night but just looking for a little something extra to maintain the batteries while I am out there. I am running all optima batteries. Anyone have any input on these? Brands they have used etc?

I had a small one that was actually a VW promotional item a few years ago. It worked okay to trickle charge my campus beater when it was parked in a remote lot for days at a time. I don't think the output would be enough to keep batteries topped off running a stereo. Unless you covered your entire deck with them...