>>1820926Where in CO?
>>1820933A small solar panel or maybe a micro hydro turbine (20W is more than sufficient) with a cheap charge controller, a small lead-acid battery, a DC LED light, and a DC to DC phone charger for charging batteries. You can get car batteries for free that no longer have the CCA to start a car but still have enough capacity for what I'm planning. I'll probably build a small window into the door that I can cover up in winter if I need to.