Since the Northeastern hit 2 weeks ago; In NJ; I've been requested to give estmates on whole house residential NG 14 or 20 kw backup generators. I'm presently researching between the Kohler and Generac units. Installers/electricians of these units favor kohler for their dependability and ease of accesability . They both run @3600rpm's. The Kohlers website reviews their transfer switch, and could not find a combined unit, w/ service rated OPD within. Kohler sells transfer switch and OPD separately. also, their load sheding module must be purched separately. An Inspector informed me a Kohler Gen w/ a Cut Hammer Transfer switch is a good combo. I'de need some light on that. I've only wired one Generac recently, Nice complete kit, easy install, and started right up, but seemed lack of quality in build. The nuetral lug terminals where too small, and needed a forked type lug or a separately installed lug for the incomming nuetral. Thats all. Never wired or seen a Kohler yet, and have hard time getting a local Kohler Cooper service rep to call me back. Are thes Kohler unit worth the extra $. All the customers me to pad and plumb the units. I'll have to do a load calculation of electric and gas usage to order proper unit and if gas line/meter is sufficient for all appliances and Gen at same time. If anyone with experience with any of these units or transfer swiches is available , please comment. , Tuesday I was doing a startup on a Kohler generator installed, the Kohler tech was telling me the parent company sold off the generator division, and was focusing on their plumbing division. The new owners wanted to keep the Kohler name, but Kohler wanted the name to only be associated with the plumbing line., For those that install Kohler generators . B. Birken Vogt Senior Member. Location Grass Valley, Ca. Nov 12 .