Weigh a Generac 20 KW stator, a LIMA 20 KW stator and a KATO 20 KW stator.
After which, Generac owners are entitled to start weeping.
Generac would be far better off making a DC generator and bolt it to someone else's inverter.
I got called out on a long-distance service all in Inyo County California. A 12.5 KW Generac. It ran fine but developed no power. There were bullet holes in the generator end! "Sum@#$%^&! fourth time it quit on us so I shot it!" Gold miners. I raced back 200 miles and snagged a LIMA and had the thing going in a couple of days. Out of the blue several months later the guy shows up at the plant bearing a forty pound box of outrageously expensive fillet Mignon steaks. In dry ice. "It's still workin'" he quipped. He slammed the box down on the counter then turned around and walked off.