The Generac 6439 Steel Enclosure 10,000-Watt Air-Cooled Liquid Propane/Natural Gas Powered Standby Generator is fast-acting, automatic protection from power loss. Ideal for home use, this generator powers up automatically and within seconds of a power outage without the need for any manual startup. Without any buttons to push or cords to plug in, an automatic standby generator starts up by itself even when you're away. Featuring easy installation, it comes pre-wired and packaged with virtually everything necessary to connect to your home's electrical system and existing liquid propane or natural gas fuel supply, so you're protected next time the lights go out. When the power goes out, this generator eliminates the hassle of dealing with a fuse box. After all the liquid propane, natural gas or electrical connections are made, the Generac 6439 is ready to run 24/7 and requires absolutely no manual operation, no fueling and no extension cords. The generator features the 530cc Generac OHVI engine, an exclusive air-cooled generator engine with a high-performance design that can accommodate large electrical loads. The engine optimizes power to respond swiftly to changing conditions. To add to your peace of mind, the engine requires routine maintenance only once every 2-years or after 200-hours of use. This Generac generator meets CARB requirements. It requires a Group 26R 12-volt minimum 525 CCA battery (sold separately). Generac 6439 comes with a 30-foot, 5-foot and 2-foot pre-wired conduits; outdoor connection box; 1-foot flexible fuel line pigtail; composite mounting pad; installation guide and owner's manual. The Generac 6439 Steel Enclosure 10,000-Watt Air-Cooled Liquid Propane/Natural Gas Powered Standby Generator measures 48-Inch by 25-Inch by 29-Inch, weighs 407-pounds and comes with a 2-year limited warranty.