Very interesting article by Jim Van Sant on how he made a 12 vdc alternative energy system. Solar is great as long as there is sun but his system doesn’t rely on the sun. Once he had it all together he says he was able to fully charge a 12 volt battery in a matter of minutes. Kudos to Jim for this one. That is really a neat diy project.
Homemade electric power diy Project
http://www.backwoodshome.com/articles2/vansant131.html
Alternative Energy Secrets: Practical Solutions for Personal Energy Problems
Alternative Energy DeMYSTiFieD, 2nd Edition