"Home Power" magazine is what you need to check out: http://homepower.com/home/ http://homepower.com/home/ All their back issues are available online in pdf.

"Home Power" magazine is what you need to check out: http://homepower.com/home/ http://homepower.com/home/ All their back issues are available online in pdf. They have all the details on cost-effective clandestine home energy solutions. Also, the trick to cheap hot water is a water heating coil on your roof facing the sun. The water gets hotter as it runs through the coil.