What I Learned About Kohler Generators After 5 Years of Office Purchasing

I oversee purchasing for a mid-sized company—roughly 200 employees across three locations. My job is to keep the lights on, literally and figuratively. When we needed a new backup generator for our main office, I dove into the specs, the dealers, and the fine print. Here are the real questions I had, and what I found.

Is Kohler or Generac the better generator for commercial use?

Short answer: It depends on your priority. If you want the most comprehensive dealer network for service and installation, Kohler is a very strong choice. Generac tends to have a wider range of lower-cost residential units. For our commercial setup, the difference in long-term support was a big deal.

Everything I'd read online said Generac was the 'consumer champion,' but in practice, finding a certified service tech for a major commercial unit in a shorter timeframe was easier with the Kohler dealers I contacted. (This was for our 100 kW range, mind you—not a small home unit.) A local electrician even told me, "I can get a Kohler part in two days. For some Generac commercial parts, it's a week." That kind of feedback from a pro is a serious consideration.

What are the pros and cons of Kohler vs. Generac?

I compiled a list based on our needs and feedback from three different vendors.

Kohler Pros:

• Build quality: The enclosures and engine blocks feel heavier and more robust. They use a dedicated Kohler industrial engine in many models.
• Dealer network: For commercial sales, their support and parts distribution is a differentiator—especially for the 14RESA and larger models.
• Noise levels: Their newer models (like the 14RESA) are quieter than I expected. Not 'whisper quiet,' but noticeably better than older models.

Generac Pros:

• Price point: Their upfront cost is usually lower. A typical quote was 10-15% cheaper than the Kohler equivalent.
• Availability: Easier to find in big-box stores and online. You can pick one up off the shelf for smaller home units.

The Con(s): For the commercial units we needed, the dealer service from Generac felt less specialized. A vendor told me, "We sell both, but we recommend Kohler for the heavy-duty stuff because it requires less hand-holding." That stuck with me.

What is the Kohler 14RESA generator like?

I installed two 14RESA units (this was circa 2023) for a satellite office. It's a popular model—a 14 kW air-cooled standby generator. It's super straightforward.

First impressions: It's smaller than I expected. About the size of a large air conditioning unit. The sound-dampening enclosure actually works well. I stood next to it during a test and could hold a conversation (shouting slightly, but still).

Specific feedback from our maintenance team: The controller interface is easy to use. The diagnostic codes are readable. They said the engine starts reliably even after sitting for months. The one downside? The oil filter location. It's a bit of a reach. Our maintenance guy said, "It takes an extra ten minutes to change. Not a deal-breaker, but annoying." (I really should write that down in our service log.)

Why are Kohler generator prices so high?

I get asked this a lot. A quote for a commercial Kohler setup can feel like a lot. But I've learned to ask, 'What's NOT included?' before asking 'What's the price?'

It's a transparency trust thing. Some vendors quote a base price, then add installation, concrete pad, permits, and transfer switch separately. The total ends up being about the same as a more 'expensive' all-in quote from another dealer. The vendor who lists all fees upfront—even if the total looks higher—usually costs less in the end because there are no surprises. I made the mistake of not asking about pad installation once. Cost me $400. Now I look for the full breakdown.

How do I find a Kohler generator dealer near me?

Go directly to the Kohler website and use their dealer locator. Don't just Google 'generator repair.' Please. The difference between a certified industrial dealer and a general contractor who 'can install those' is massive. The authorized dealer will have access to genuine parts, proper training, and the latest software for the controller. The other guy might save you $500 on labor but could void your warranty. A $4,000 warranty is not worth saving $500.

What about the spark plug on a lawn mower? Or a solar generator?

I know these keywords came up. I can't help you with a lawn mower spark plug—that's not my area. As for solar generators, they're a different solution entirely. A solar generator is great for portable power or a backup for critical medical devices, but it won't power a 400-person office's HVAC system in a snowstorm. The physics don't work. A diesel or gas generator is still the standard for whole-building backup. I looked into it. Not for me.