I think you got it back-asswards.
Never hurts to get educated on what you need before you buy something. Figure out the amps needed to run and go from there.
Generac is the only way to go in my opinion. Ours quit 3 day in an ice storm. They drove 150 miles from St Louis under warranty and did whatever they needed to. No charge. We have a 10 yr warranty. Starts 10 minutes a week to keep battery fresh. Starts 60 seconds after power goes out. If it is nasty outside the last thing you need to do is go out and try to get one started.