The generator experts present the #1 selling automatic standby generator for 24/7 automatic power protection. Choose what you would like to backup, so you can keep your life going without disruption. Unlike a portable generator that requires frequent refueling, the automatic standby generator runs on existing natural gas or LP fuel. The Generac OHVI engine is designed for extended run times - up to 3,000 hours of service with proper maintenance and typical usage. Generac automatic standby generators include a pre-wired EZ switch and wiring kit that provides the easiest and most cost effective installation available on the market. The programmable, automatic weekly self-test means you can be confident that the generator is ready to automatically power up when the power goes out. UL Listed - Includes a 200 Amp nexus smart switch for up to whole house coverage also features an external GFCI outlet for outdoor power needs - Patented, Quiet-Test features an ultra-quiet, neighborhood-friendly self-test that you can schedule whenever you choose with user friendly digital controls - Generac OHVI engine is designed specifically for generator use and extended operation with a two year, 200 hour service interval, your Generac generator will be easy to maintain and last for years to come - If the power ever goes out, your Generac standby generator system goes on - automatically - protecting you and your home 24/7 the engine runs on existing natural gas or LP for a continuous, worry-free fuel supply