I'm trying to figure out the generator thing too, have a customer asking about one.

Ran across a cut sheet from Kohler, says it can start and run a 4 Ton A/C. I wonder if you could put a soft start on an AC condensor?..... http://www.kohlerpowersystems.com/pdf/G4097.PDF

Does anybody know what brands are the most reliable? Who do you order these from? I doubt my supply houses have accounts with these companies
Mike