KOHLER Generators 12RESVL100 Amp Standby Indoor Generator, 12-Space with Load Center Automatic Transfer Switch, 12000-watt 12 kW standby generator with automatic transfer switch and oncue plus 12 kW generator to keep your appliances working, the heat or AC running and your security system on, based on load size. Power boost technology provides power to start large loads without dropping power to other appliances Premium power quality engineered to protect your most valuable electronics with exceptional digital voltage and frequency regulation along with low levels of harmonic distortion