The diesel engine tech that serviced our generator at the credit union I worked for said we love GENERAC because they always break,stay away.
I’ve got a GE whole house generator that runs on natural gas. It’s 15kW and strictly for power outages. Had it for about 3 years and used it about 3 times without a problem.
Mine is gas, 15KW had it 10 years. Uncover it, hook up the battery...push start. Not once have I had an issue with it. On average I need it 4-8 days out of the year. One year it ran 11 days straight. Tornado took down grid.... It powers everything we need.
Most smaller Generators have the Generac front end (power generation). I haven’t been around any diesel units.
I sure can’t complain on the performance of mine...