Ok thanks a 5w had been suggestedSuggest PowerFilm Rollable from JSI at 800-652-4914 rollable 14 watts 0.9 amps R-14 42 x 14 with 15 ft extension cord + diode $210, RA-40 4.5 amp controller $40, Also check out www.aurino.com 360-299-8510 or 230-2360 toll free 877-433-8640. The PowerFilm Rollable is what I am planning on installing.
I have a cheap 5 watt plastic frame with a charge regulator all bought from northern tool & equip. I think I have $40 in it total. I also have have a fuse as close to the battery's positive terminal as possible. This will always shut the charge regulator off if I leave it on for a week and always keeps the battery topped off. The fuse is a must!!!