Most Generac vs Kohler comparisons come from somebody who sells one of them.

We sell both. GT Electric is an authorized dealer and installer for Generac and Kohler standby generators. We service both across Tallahassee and the Big Bend. And we have no financial reason to steer you toward either one. That makes this comparison less exciting and a lot more useful.

Here’s the short version. Both brands build genuinely good whole-home standby generators. A correctly sized unit from either one will run your house through a multi-day outage. The differences are real. But they’re differences in warranty structure, controls, monitoring, and enclosure — not in whether your lights come on.

What follows comes from current manufacturer spec sheets, not from either company’s marketing.

First, a Housekeeping Note About the Kohler Name

Researching Kohler generators lately? If you’ve run into the name Rehlko, you haven’t wandered onto the wrong site.

Kohler Co. spun off Kohler Energy in 2024, and it now goes by Rehlko. Rehlko builds the home generators now. They still carry the KOHLER name, the KOHLER badge, and the KOHLER warranty.

In short, nothing about your unit, your dealer, or your coverage changes. It just means the spec sheets and warranty documents now live under a company name you may not recognize.

By contrast, Generac has had no equivalent change. Same company, same brand.

Generac vs Kohler Engines, Cooling, and Where Each Lineup Tops Out

Both companies build their own engines. That’s not universal in this category, and it’s worth knowing.

Generac uses its own G-Force / OHVI engines in its air-cooled home standby units. They’re pressure-lubricated and use an automotive-style spin-on oil filter. The 22–28 kW units run the G-Force 1000 Series, a two-cylinder 997 cc engine.

Kohler uses Kohler-branded engines across its air-cooled lineup. The KT725 runs the smaller units. The CH1000 and CH1006 V-twins run at 20 kW and 26 kW.

Both brands’ air-cooled units run at 3,600 RPM. You’ll read online that liquid-cooled generators all run at 1,800 RPM and therefore last longer. That’s not true as a blanket statement. Several of Generac’s residential liquid-cooled models run at 3,600 RPM. And no manufacturer publishes a service-life figure that backs up the longevity half of the claim. Set it aside.

Where the two lineups differ meaningfully is the ceiling. Generac’s air-cooled range runs 10 kW to 28 kW. Kohler’s air-cooled range runs 10 kW to 26 kW. Both brands offer liquid-cooled units that overlap the top of their air-cooled range. That creates a decision zone in the low-to-mid twenties rather than a hard line.

In practice, for most North Florida homes, that never matters. For a large home with two HVAC systems at the top of the air-cooled bracket, it occasionally does.

Generac vs Kohler Warranty: The Clearest Real Difference

This is the one place where the two brands genuinely differ. It’s also the detail most comparison articles get wrong.

Both brands advertise a five-year warranty. The two do not work the same way.

What Each One Actually Covers

Kohler covers 5 years or 2,000 hours. Its spec sheets and warranty page state it plainly. That coverage includes parts, labor, and travel for the entire period.

Generac covers 5 years as well, but in tiers. Per Generac’s own air-cooled limited warranty document, coverage runs:

• Years 1–2 — parts, labor, and mileage
• Year 3 — parts only
• Years 4–5 — engine short block and alternator parts only

Generac also caps travel at 100 miles or three hours round trip per occurrence.

Which Structure Actually Serves a Florida Homeowner

Here’s the honest framing. Kohler’s warranty runs broader through years three to five, because labor and travel stay covered. Generac’s has no domestic hour cap on air-cooled units, where Kohler’s stops at 2,000 hours.

But 2,000 hours is a lot for a home standby generator that runs weekly. Most residential units won’t come close in five years. So in practice, the labor-and-travel coverage is the more consequential half of that trade.

Plenty of pages online describe Generac’s warranty as “5 years parts and labor.” That’s the single most common error in this comparison. Generac’s own warranty document says otherwise.

Extended Coverage on Both Brands

In addition, both brands sell extended coverage through certified dealers. Kohler publishes 7- and 10-year parts plans. A 10-year comprehensive plan covers parts, labor, and travel on the generator and the switch.

Ask us for current terms on either brand when we quote. Extended warranty programs change. We’d rather not print numbers here that go stale before you read them.

Noise, Enclosures, and What Florida Actually Does to Equipment

On noise, they’re closer than the marketing suggests. Both brands publish 67 dB(A) at 23 feet at the top of their air-cooled range. That’s Generac’s 26 kW under normal load and Kohler’s 26RCA in normal operation. Exercise mode runs 55 dB(A) for Generac and 56 for Kohler.

In other words, those are effectively identical numbers.

One caveat: Generac specifies the load condition on its measurement, and Kohler’s air-cooled sheets don’t. Generac’s own support documentation also notes there’s no standardized industry method for measuring generator sound. Treat published dB figures as a rough guide. They aren’t a promise about how it sounds from your neighbor’s porch.

On enclosures, there’s a distinction that matters more here than it would in Georgia. Every Generac air-cooled home standby, 10 kW through 28 kW, uses an aluminum NEMA 3R enclosure. On the Kohler side, the 14RCA, 20RCA, and 26RCA use aluminum sound enclosures. The entry-level 10RESV and 12RESV use steel.

For a home in the Big Bend, that’s worth knowing before you sign. It matters most anywhere the salt air off the Gulf reaches.

Neither manufacturer publishes a salt-spray corrosion rating. So nobody can tell you one enclosure outlasts the other by a specific number of years. Still, aluminum versus steel in a humid coastal climate is a real consideration. It comes down to the smallest Kohler units.

Transfer Switches, Load Management, and Monitoring

The generator gets the attention. The automatic transfer switch (ATS) senses the outage, disconnects you from the utility, and starts the generator. That’s where the two systems actually diverge in design.

The Switch Itself

Generac offers residential transfer switches from 50 A to 800 A. This includes service-entrance-rated models at 100 A and 200 A. It also offers versions with integrated surge protection and load-center models. Current air-cooled units 14 kW and up typically pair with a 200 A service-rated switch with built-in surge protection.

Kohler offers the RXT and RDT families, 100 A through 400 A. Both come in standard and service-entrance configurations, in corrosion-resistant NEMA 3R aluminum enclosures.

Kohler vs Generac Load Management: Two Architectures

This is where the designs genuinely differ. Both brands can shed non-essential loads so a smaller generator covers a larger house. That technique often decides whether you need the next size up.

• Generac’s approach uses the Load Manager (recently renamed from Smart Management Module). It senses line frequency to detect that the generator is running. That means no control wiring back to the transfer switch. A system supports up to eight of them.
• Kohler builds load management into the RXT transfer switch. A combined interface board manages up to six loads: two HVAC relays plus four power relay modules.

Overall, neither is better in the abstract. Generac’s is simpler to add to an existing installation, because there’s no control wire to run. Kohler’s is more integrated from the start. On a retrofit, that difference occasionally decides the design.

Remote Monitoring: Generac vs Kohler

On remote monitoring, Generac’s current air-cooled units ship with built-in cellular connectivity and Mobile Link. A free basic tier covers the essentials, and a paid premium tier unlocks the rest.

Kohler’s RDC2 controller includes an Ethernet connection standard for the KOHLER Energy Management app. Wireless requires an add-on radio kit. Kohler publishes no subscription fee for the app.

One practical note if you already own a Kohler. The company has migrated from OnCue Plus to the KOHLER Energy Management app. Kohler’s own documentation says you’ll need new credentials even if you used OnCue before.

Kohler vs Generac: Where Each Brand Is Actually the Better Pick

Stripped of the marketing on both sides:

Choose Kohler if the warranty structure matters most to you. Parts, labor, and travel for the full five years is the strongest single differentiator here. And it’s a documented specification, not a marketing claim. Kohler also claims more than 3,000 certified dealers in the US and Canada. It advertises a 200-mile dealer service radius.

Choose Generac if you want the largest air-cooled unit available — 28 kW. The same goes for the simplest path to load management later, or cellular monitoring without an add-on. Generac’s SEC filings describe the largest independent generator dealer network in North America. Its FY2021 annual report last put the number at over 8,000 dealers. That’s a real advantage for parts and service if you ever move or sell the house.

It’s a coin flip if you’re a typical Tallahassee home with one central HVAC system on natural gas. At that spec, sizing lands in the 20–24 kW range. The two are close enough there that availability, lead time, and who services it decide the outcome. Not the badge.

And that last point deserves more weight than it usually gets. A generator is a machine with an engine that needs oil changes, filters, a battery, and an annual look. A local tech who services it promptly, keeps parts on hand, and answers the phone beats any spec sheet. That’s true of either brand. Whichever you choose, put it on a maintenance schedule from day one.

Frequently Asked Questions

Choosing Between Generac vs Kohler

Is Generac or Kohler better? Neither is categorically better. Kohler has the stronger warranty structure — parts, labor, and travel for the full five years versus Generac’s tiered coverage. Generac has a larger dealer network, a higher air-cooled ceiling at 28 kW, and built-in cellular monitoring on current units. For most North Florida homes, both are excellent. Sizing and installation quality matter far more than the badge on the enclosure.

Which one is quieter? At comparable sizes, essentially the same. Both brands’ 26 kW air-cooled units publish 67 dB(A) at 23 feet. Exercise-mode figures land within one decibel of each other. Placement, the pad, and the distance to the nearest bedroom window affect perceived noise far more than the badge does.

What size do I need before I pick a brand? Size first, brand second. The load calculation is the same whichever manufacturer you end up with. Your air-conditioning tonnage drives it. So does whether you’re on a well, which appliances run electric versus gas, and your fuel type. Our post on what size whole-house generator a Florida home needs walks through it.

Owning and Servicing Either Brand

Do Generac and Kohler generators produce the same power on natural gas as on propane? Usually not. Most models produce somewhat less on natural gas. Both brands’ 26 kW air-cooled units deliver 26 kW on propane and 24 kW on natural gas. A few models run the same on both fuels. It’s one of several reasons we size against your actual fuel supply.

Can you service a generator you didn’t install? Yes. We service both Generac and Kohler units across Tallahassee, Leon, Wakulla, Gadsden, and Jefferson counties. It doesn’t matter who put them in.

Does Kohler still make generators, or is it Rehlko now? Both, in a sense. Kohler Energy separated from Kohler Co. in 2024 and became Rehlko. Home generators still carry the KOHLER brand and the KOHLER warranty. Your dealer relationship and your unit are unaffected.

Do both brands qualify for the same permitting and inspection process in Leon County? Yes. Permitting, gas work, and utility coordination are the same for both brands. We handle all of it.

Pick the Installer First, Then the Brand

We carry both because both are worth carrying. After enough installations across the Big Bend, the pattern is clear. The generators that disappoint people are almost never the wrong brand. They’re the wrong size. Or the installer no longer answers the phone. Or they’ve gone four years without an oil change.

Get the sizing right. Get it installed by a local company that will still be here in year six. Then pick the badge you like.

Want to see both side by side and talk through which fits your house? That’s a conversation we’re happy to have. Including the part where we tell you the cheaper unit is fine. Start with our whole-home generator page or just call.

📞 GT Electric of Florida — Authorized dealer and installer for both Generac and Kohler, with no thumb on the scale. Schedule an assessment: (850) 655-0868 | Contact us online

Serving Tallahassee, Leon County, Wakulla, Gadsden, and Jefferson Counties since 1979. Licensed, insured, and locally owned.