Generac Guardian Series 5871 10,000 Watt Air-Cooled Liquid Propane/Natural Gas Powered Standby Generator With Transfer Switch (CARB Compliant)  (Older Model) (Discontinued by Manufacturer) Convenient, hands-free operation with no fueling. No manual start. No extension cords. Runs on natural gas or liquid propane. Clean, smooth True Power Technology provides safe operation of sensitive electronics. Includes automatic transfer switch with 10 circuits protected (NEMA 1, indoor rated only) 10,000 Rated Watts CARB Compliant