Generac Power Systems is a manufacturer of backup power generation products for residential, commercial, and industrial customers. The company was founded in 1959 and is headquartered in Waukesha, Wisconsin. Generac operates through two business segments: Domestic and International. The Domestic segment produces generators, transfer switches, and other backup power equipment for residential and commercial customers in the United States. The International segment produces similar products for customers outside the United States. Generac sells its products through a network of dealers and distributors.