KOHLER RCAL 20000-Watt (LP) / 18000-Watt (NG) Standby Generator with 200-Amp Automatic Transfer Switch in the Home Standby Generators department at Lowes.com
KOHLER 20,000-Watt Air-Cooled Whole House Generator with 200 Amp Transfer Switch 20RCAL-200SELS - The Home Depot