Short answer: Pick Kohler if the warranty matters most: its standard 5-year/2,000-hour warranty covers parts, labor and travel for the whole term[1], while Generac's drops to parts only in year 3 and to major components in years 4–5[2]. Pick Generac for the lower list price at 14 kW and 26 kW[3, 4, 5, 6] and, with the newer NextGen models, more output on natural gas[7]. The 26 kW class is the closest match: the Kohler 26RCA and Generac NextGen 26 kW are both rated 24 kW on natural gas.
Kohler vs Generac at a glance
| Generac (Guardian / NextGen) | KOHLER (RCA series) | |
|---|---|---|
| Standard warranty | 5 yr / 2,000 hr: parts, labor & limited travel yrs 1–2; parts only yr 3; major components only yrs 4–5[2] | 5 yr / 2,000 hr: parts, labor & travel for the full period; 7- and 10-yr limited warranties optional[1] |
| Natural gas output, 26 kW class | Guardian 22.5 kW[8] · NextGen 24 kW[7] | 26RCA: 24 kW[1] |
| Natural gas output, 20–22 kW class | Guardian 22 kW: 19.5 kW[9] · NextGen 22 kW: 21 kW[7] | 20RCA: 18 kW[10] |
| Natural gas output, 14 kW class | 14 kW[11, 12] | 14RCA: 12 kW[13] |
| Weekly exercise sound (23 ft) | 55–57 dB(A) in Quiet-Test[9, 7] | 56 dB(A) (26RCA) to 66 dB(A) (20RCA)[1, 10] |
| Remote monitoring | Mobile Link: Wi-Fi standard on Guardian[9]; cellular standard on NextGen[7] | KOHLER Energy Management System, Ethernet connection[1] |
| Enclosure wind rating | 150 mph[9] | 181 mph, aluminum enclosure[10] |
| Lowest MSRP, 26 kW class | $6,989 (7290)[5] | $7,546 (26RCA)[6] |
| Maker | Generac Power Systems | Rehlko (Discovery Energy, LLC), formerly Kohler Energy[14, 1] |
Where each brand wins
Generac
- Lower list price at 14 and 26 kW. At 26 kW the Guardian 7290 lists at $6,989 vs $7,546 for the Kohler 26RCA[5, 6].
- NextGen models lose less power on natural gas. The NextGen 22 kW is rated 21 kW on natural gas vs 19.5 kW for the Guardian 22 kW and 18 kW for the Kohler 20RCA[7, 9, 10].
- Shorter, quieter self-test. Quiet-Test runs at low speed for 5 minutes by default at 55–57 dB(A)[9, 12].
- Remote monitoring included. Generac says Mobile Link remote monitoring is free with every Guardian Series generator[15].
Kohler
- Stronger standard warranty. Full parts, labor and travel coverage for 5 years / 2,000 hours[1].
- Higher wind rating. 181 mph vs 150 mph for Generac[10, 9].
- Published motor-starting figures. Kohler lists peak motor starting of 33 kVA (14RCA), 41 kVA (20RCA) and 39 kVA (26RCA)[13, 10, 1]; the Generac spec sheets we reviewed do not list a kVA figure.
- No routine valve adjustment. The Command PRO engine uses hydraulic valve lifters[1].
Model-by-model comparisons
Price by model
Manufacturer MSRP and cost per kW, generator-only vs with transfer switch.
Kohler 20RCA vs Generac 22 kW
The most-compared sizes, on propane and natural gas.
Generac 26 kW vs Kohler 26RCA
The largest air-cooled models head to head.
Generac 14 kW vs Kohler 14RCA
Smaller-home models compared.
Warranty, service & maintenance
What each 5-year warranty actually covers.
Noise
dB(A) at 23 ft, running and exercising.
Natural gas vs propane
How much power each model loses on natural gas.
Reliability & cold weather
Design facts, cold-weather kits and wind ratings.
Best standby generator brand
How Generac, Kohler and Briggs & Stratton compare.
Remote monitoring
Generac Guardian models come with Mobile Link Wi-Fi[9], and the NextGen line has cellular connectivity standard, plus Wi-Fi and Bluetooth[7]. Kohler RCA generators include the KOHLER Energy Management System for remote monitoring, connected through the controller’s Ethernet port[1]. Older Kohler units used an app called OnCue; current spec sheets name the Energy Management System instead.
For the installed price at your home, use the HomeGeneratorCost.com calculator. Not sure what size you need? Try the generator sizing calculator.
Frequently asked questions
Is Kohler better than Generac?
Neither wins on every spec. On the manufacturers' own documents (checked October 27, 2026), Kohler's standard warranty covers parts, labor and travel for all 5 years / 2,000 hours, while Generac's covers parts, labor and limited travel for years 1-2, parts only in year 3 and major components in years 4-5. Generac lists lower prices at 14 kW and 26 kW, and its newer NextGen models lose less output on natural gas; the Kohler 26RCA matches the Generac NextGen 26 kW on natural gas (24 kW).
Which is quieter, Kohler or Generac?
During the weekly self-test, Generac's spec sheets list 55-57 dB(A) at 23 ft in Quiet-Test mode, and Kohler lists 56 dB(A) (26RCA EcoExercise) to 66 dB(A) (20RCA). At full speed both list 65-70 dB(A) depending on model. The brands measure differently, so treat small gaps as a tie.
Which costs less, Kohler or Generac?
On manufacturer MSRP as of October 27, 2026, Generac is lower at 14 kW and 26 kW, while the Kohler 20RCA ($6,016) lists below the Generac 22 kW Guardian ($6,119). Installed cost depends mostly on labor, gas and electrical work; see HomeGeneratorCost.com for installed-cost estimates.
Who makes Kohler generators now?
Kohler's former energy business became a stand-alone company named Rehlko in 2024; Platinum Equity is the majority owner and Kohler Co. remains an investment partner. Current KOHLER home generator spec sheets are published by Discovery Energy, LLC.
Sources
Every figure on this page was taken from the documents below, all opened on October 27, 2026. Manufacturers revise spec sheets and prices; check the linked document before you buy.
- 1. KOHLER 26RCA/26RCAL spec sheet G4-315 (rev. 4/26g), Discovery Energy, LLC (accessed October 27, 2026)
- 2. Generac 5 Year Limited Warranty for Residential and Commercial Standby Generators, Part 10000039087 Rev A (accessed October 27, 2026)
- 3. Generac 7223 (14 kW Guardian) product page, MSRP (accessed October 27, 2026)
- 4. KOHLER 14RCA product page (Rehlko), MSRP (accessed October 27, 2026)
- 5. Generac 7290 (26 kW Guardian) product page, MSRP (accessed October 27, 2026)
- 6. KOHLER 26RCA product page (Rehlko), MSRP (accessed October 27, 2026)
- 7. Generac NextGen 22/24/26/28 kW spec sheet, Part A0005151077 Rev. B (07/11/2025). Generac document, copy hosted by retailer Global Industrial (the generac.com link did not resolve on Oct 27, 2026) (accessed October 27, 2026)
- 8. Generac Guardian 26 kW spec sheet, Part A0002026894 Rev. D (09/19/2022) (accessed October 27, 2026)
- 9. Generac Guardian 20/22/24 kW spec sheet, Part A0000937814 Rev. E (03/15/2022) (accessed October 27, 2026)
- 10. KOHLER 20RCA/20RCAL spec sheet G4-272 (rev. 4/26j), Discovery Energy, LLC (accessed October 27, 2026)
- 11. Generac Guardian 10/14/18 kW spec sheet, Part A0000973374 Rev. A (10/22/2020) (accessed October 27, 2026)
- 12. Generac NextGen 14/18 kW spec sheet, Part A0005151081 Rev. B (07/11/2025) (accessed October 27, 2026)
- 13. KOHLER 14RCA/14RCAL spec sheet G4-270 (rev. 4/26j), Discovery Energy, LLC (accessed October 27, 2026)
- 14. Rehlko FAQs (company ownership and rebrand) (accessed October 27, 2026)
- 15. Generac 7042 (22 kW Guardian) product page, MSRP (accessed October 27, 2026)