Kohler 30RESA 30,000-Watt Liquid-Cooled Standby Generator (Discontinued by Manufacturer) 30,000-watt liquid-cooled generator powered by liquid propane/natural gas EPA-compliant GM 1.6L automotive engine--natural gas or LP gas fueled Fast 10-second response time; excellent power quality to protect valuable electronics Sound enclosures for reduced noise levels; requires a Kohler RDT transfer switch Measures 72.8 by 36.2 by 36.8 inches; 5-year/2000-hour limited warranty, Battery type needed - Group 26 Warranty Coverage- Five (5) years from the registered startup date (or, if there is not a registered startup date, the date of purchase by the original end user) or 2,000 hours (whichever occurs first)