Generac 6243 17,000 Watt Air-Cooled Aluminum Enclosure Liquid Propane/Natural Gas Powered Standby Generator with Transfer Switch, 200SE (not CUL) (Discontinued by Manufacturer) Unit runs on natural gas or liquid propane and features hands-free operation with no fueling, no manual start and no extension cords Clean, smooth True Power Technology provides safe operation of sensitive electronics Includes automatic 200-Amp Smart Transfer Switch (NEMA 1, indoor rated only) 17,000 Rated watts and this model is UL, CUL and EPA compliant for safety Comes with a 2-year limited warranty and is CARB Compliant