 These sales made Real Goods one of the first companies to sell a solar panel commercially in the United States.The success of the Willits store prompted Schaeffer to open an additional store in Ukiah, California, in 1980 and a third store in Santa Rosa, California in 1982.That same year, Real Goods published the first edition of "The Solar Living Source Book", which was written as a comprehensive source for sustainable living principles and practices.