The Firman H08051 is designed to wow, and you'll undoubtedly become a fan. It uses a Max Pro Series 439cc Firman engine that produces maximum power. This generator has a peak wattage of 10000 and a rated wattage of 8000. It works with two fuels and has a fuel capacity of 8 gallons. The Firman H08051 is an excellent generator that can power your appliances for up to 12 hours at 50% load. It has a sound level of 74 dB and includes an electric start for easy starting.