SGX Series generators include three models ranging in outputs from 3,500 to 7,300 watts. Models SGX3500, SGX5000 and SGX7500E are powered by Subaru engines with horsepower ratings from 7 to 14, respectively. Fuel tanks and run times vary from 4- to 8-gallon capacities and 7- to 9.4-hour run times at rated loads. All models feature an automatic voltage regulator system, and the largest model offers an electric starting system with recoil backup.