My Dad has a Generac. I am guessing he has had it at least 5 to 7 yrs now, maybe longer? He lives in a ranch house, about 1800 sq ft....the Generac powers his heat/AC, most all his lights, fridge, freezer, TV’s. He has had absolutely no problems with his unit. He gets it serviced once a year. As far as I know, he had to have the battery in it replaced once in all these years. I want to say he paid about $5K for his unit.
Thank you! I guess the “mileage may vary.”