I found an open box deal for a 50w solar starter kit ($86) so figured it was time to try.
I've wanted one to keep the deep cycle topped off, as well as recharging when we're boondocking.
Came with the 2'x2' panel, 20' pair of 10ga leads, the simple controller, and other bits and pieces.
Went together easy enough - put a "regular" plug on the controller side so it is easier to disconnect and store the leads and panel when traveling. Took about 4 hours to bring the battery up to 12.8V from 12.3V - seems pretty good.
Going to do some testing with running the fan all night and seeing where that takes the battery - then if the battery can recover in a day of sunlight.