Thinking of getting on to supplement my second battery. The dang fridge runs it down in 36 hours. Attracted to them because of Battery Tenders history of quality and it has the built in controller. My plan is to set it inside the windshield and hold it against the glass with my sunshade and visors. My concern is using it in a confined space, off gassing perhaps, getting so hot as to melt my dash board. Anyone out there have any experience with these? Any other suggestions? I know nothing about solar so designing and building something like this from unrelated parts and companies would be unlikely without some big time help.

http://batterytender.com/15-watt-solar-charger.html

http://batterytender.com/15-watt-solar-charger.html