Generac and Kohler are the two dominant standby generator brands in Texas. We installed hundreds of both across Dallas–Fort Worth. Here is the side-by-side comparison Texas homeowners actually care about — price, power, warranty, noise, and storm survival.
Texas weather does not mess around. Ice storms in February, derechos in spring, and hundred-degree heat waves in summer all knock out power across Dallas–Fort Worth. When the grid goes down, a standby generator is not a luxury — it is survival. The two brands we install most often are Generac and Kohler. Both are American-made. Both are excellent. But they are not the same machine. Here is the breakdown from electricians who service both brands every week across Plano, Frisco, Arlington, and beyond.
The Basics: Generac and Kohler at a Glance
Generac is the volume leader. They sell more home standby generators in the United States than every other brand combined. Kohler is the premium alternative — built heavier, with commercial-grade engines and longer standard warranties. Think of it as the difference between a Ford F-150 and a Chevy Silverado HD. Both get the job done. One is built for the mass market. One is built for people who want the absolute toughest machine.
Power Output Comparison for Texas Homes
Texas homes are big. Our average customer in Flower Mound, Southlake, or McKinney has a 3,000+ square foot house with two HVAC systems, a pool pump, and a tankless water heater. You need serious power. Here is how the two brands stack up:
- Generac Guardian series: 10kW to 26kW air-cooled. The 22kW and 26kW units handle most DFW homes under 4,500 sq ft.
- Generac Protector series: 15kW to 50kW liquid-cooled. For estates, small commercial, or homes with three AC units.
- Kohler RESV/RESVL series: 10kW to 26kW air-cooled. The 20kW and 26kW are their bread and butter for residential.
- Kohler 30RCL and up: 30kW to 150kW liquid-cooled. Built for luxury homes and light commercial in Preston Hollow, Westlake, and Southlake.
Both brands offer load management modules that let a smaller generator handle a larger home by prioritizing circuits. A 22kW Generac with smart modules can run a 4,000 sq ft home with two AC units — as long as they do not start simultaneously. Kohler's Power Boost technology does the same thing with slightly faster voltage recovery.
Price Comparison: What DFW Homeowners Actually Pay in 2025
These are installed prices including the automatic transfer switch, gas line coordination, electrical connection, permitting, and startup testing. Prices vary based on your home's distance from the gas meter and electrical panel location.
- Generac 22kW + 200A transfer switch: $6,500 – $9,500 installed
- Generac 26kW + 200A transfer switch: $7,800 – $11,000 installed
- Kohler 20kW + 200A transfer switch: $7,200 – $10,500 installed
- Kohler 26kW + 200A transfer switch: $8,500 – $12,000 installed
- Liquid-cooled 30kW+ (either brand): $12,000 – $25,000+ installed
Generac generally costs 10-15% less at the same kilowatt rating. Kohler charges a premium for heavier-duty engines and longer warranties. If budget is your primary concern, Generac wins. If you want the longest possible lifespan and the best warranty, Kohler is worth the extra cost.
Warranty Comparison: What Actually Matters
This is where the brands diverge significantly. Generac's standard residential warranty is 5 years on air-cooled units. You can buy an extended warranty for up to 10 years total, but it must be purchased at the time of installation. Kohler's standard warranty is 5 years on air-cooled and 5 years on liquid-cooled, but Kohler's warranty covers parts AND labor for the full term. Generac's standard warranty is parts-only after year one in many cases. Labor coverage requires the extended warranty.
In Texas heat, that matters. Generators run hard during summer outages. If your Generac needs a major repair in year three and you did not buy the extended warranty, you are paying labor out of pocket. With Kohler, you are covered.
Noise Levels: Will Your Neighbors Hate You?
Most Texas municipalities have noise ordinances that kick in after 10 PM. Generator noise is measured at 23 feet. Here are real-world numbers:
- Generac 22kW: 67 dB(A) — about as loud as a vacuum cleaner
- Generac 26kW: 68 dB(A) — slightly louder
- Kohler 20kW: 64 dB(A) — noticeably quieter
- Kohler 26kW: 65 dB(A) — still quieter than Generac equivalent
- Liquid-cooled units (both brands): 58-62 dB(A) — significantly quieter
Kohler's quieter operation comes from a heavier steel enclosure and better sound insulation. If your generator will sit close to a bedroom window or a neighbor's fence, Kohler's noise advantage is worth considering. We also install concrete pads and noise-reducing baffles for both brands when noise is a concern.
Texas Heat and Storm Survival
This is where Kohler's commercial heritage shows. Kohler engines are liquid-cooled starting at lower kilowatt ratings, and even their air-cooled units have larger displacement engines that run at lower RPMs. Lower RPMs mean less heat stress, longer oil life, and better performance during multi-day outages. Generac's air-cooled engines are excellent — we have thousands running across Texas — but they work harder in August when it is 105 degrees and your generator has been running for 72 hours straight.
Both brands handle Texas storms well. The transfer switches on both are UL-listed and rated for lightning-prone areas. We install whole-home surge protection alongside every generator to protect the transfer switch and your home's electronics from grid surges when power returns.
Maintenance: What Annual Service Looks Like
Both brands need annual maintenance to keep warranties valid and ensure reliable operation. Here is what we do during a generator service call:
- Oil and filter change (synthetic oil recommended for Texas heat)
- Spark plug inspection and replacement
- Air filter cleaning or replacement
- Battery load testing and terminal cleaning
- Exercise cycle verification and runtime log review
- Transfer switch contact inspection and tightening
- Coolant level check (liquid-cooled units)
- Fuel pressure and regulator inspection (natural gas and propane)
Annual maintenance costs $250 – $400 for air-cooled units and $400 – $650 for liquid-cooled units. Clements Electric offers annual maintenance plans that include priority scheduling during storm season.
Our Recommendation for DFW Homeowners
If you have a typical 2,000 – 3,500 sq ft home in Allen, Frisco, or Garland and want reliable backup power at the best value, go with Generac. The 22kW or 26kW Guardian with a 200-amp transfer switch handles almost everything a Texas family throws at it. If you have a larger estate in Southlake, Westlake, or Preston Hollow, run a home business with sensitive electronics, or simply want the quietest, longest-lasting machine money can buy, Kohler is the better choice. Their liquid-cooled line is essentially commercial-grade equipment dressed in a residential enclosure.
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Schedule a Free Generator Sizing ConsultationFrequently Asked Questions
Yes. Both brands run on natural gas or propane. Most DFW homes have natural gas service, which is the most convenient fuel source. If you do not have gas, a propane tank can be installed. Propane burns slightly cleaner and stores indefinitely, making it ideal for rural properties in Parker or Wise counties.
Air-cooled generators are designed for continuous operation during outages, but manufacturers recommend limiting runtime to 500 hours before a major service interval. In practice, during a multi-day Texas ice storm, your generator can run 24/7 as long as it has fuel and receives oil level checks every 48-72 hours. Liquid-cooled units can run 1,000+ hours between major services.
Yes. All DFW cities require permits for standby generator installation. The permit covers the electrical connection, gas line work, and sometimes noise compliance. Clements Electric pulls all required permits and schedules inspections as part of our installation package.
Yes. A permanently installed standby generator adds 3-5% to home value in Texas markets according to local real estate agents. In storm-prone DFW suburbs, buyers increasingly expect backup power. A generator is a selling point, not just a convenience.