Dan Chiras, PhD, is the author of 38 books, including Solar Electricity Basics, Power from the Wind, Power from the Sun, and The Homeowners Guide to Renewable Energy. He has taught workshops on solar electricity and passive solar heating for the Evergreen Institute, the American Solar Energy Society, the Colorado Renewable Energy Society, the Missouri Solar Energy Industries Association, and the University of Colorado. Over the past 45 years, Dan has published articles on natural building, green building, solar electricity, passive solar design, self-sufficiency, and sustainability in publications such as Solar Today, Home Power, and Mother Earth News. He has installed numerous solar electric and wind systems in Missouri and has lived on solar electricity since 1996. He lives on a solar- and wind-powered farm in Gerald, MO.