I bought an onan 65 kw diesel generator which I dont have in my possession yet. I would guess its an 80's model. going to use it for my home backup. Now looking for a Economical ATS for it. It seems most of the new onan, cummins, generac ATS's are for specific generator controllers. Is there a generic ATS that would work on older generators. 200 amp 240v power! I bought this at and auction and it is stored until I make a trip to pickup, so I cant get model number.