The generator experts present the #1 selling automatic standby generator for 24/7 automatic power protection. Choose what youd like to backup, so you can keep your life going without disruption. Unlike a portable generator that requires frequent refueling, the automatic standby generators Generac OHVI® engine runs on existing natural gas or LP fuel. It is designed for extended run times - up to 3,000 hours or 30 years of service with proper maintenance and typical usage. Generac automatic standby generators include a pre-wired automatic transfer switch and wiring kit that provides the easiest and most cost effective installation available on the market. Exclusive Quiet-Test feature means you can be confident that the generator is ready to automatically power up when the power goes out. UL Listed. THIS ITEM CANNOT BE RETURNED. 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. Generacs 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. Only Generacs patented, Quiet-Test features an ultra-quiet, neighborhood-friendly self-test that you can schedule whenever you choose with user friendly digital controls. Includes a 100 Amp pre-wired transfer switch with 16 circuits, wiring kit, flexible fuel line, and composite mounting pad a $650 value - for the most cost effective and easiest installation available. Exclusive TruePower Technology delivers best-in-class power quality for confident operation of heating and cooling, HD TVs, computers and more. Sturdy galvanneal steel enclosure with RhinoCoat paint finish delivers superior weather protection. 17,000 watts (LP) / 16,000 watts (NG) Battery must be purchased separately: Group 26R, 12 Volts and 525 CCA Minimum MFG Brand Name : Generac Power Systems MFG Model # : 005504 MFG Part # : 005504