Generac vs Kohler: Which Whole House Generator Is Right for Your Colleyville Home?
By Epic Electrical | Serving Colleyville & the DFW Metroplex
You’re researching whole house generators because you’re tired of worrying about power outages.
We get it. After the 2021 winter storm, summer heatwaves that push the grid to its limit, and those sudden thunderstorms that knock out power for hours, Colleyville homeowners are done taking chances. You need backup power you can count on.
But here’s the problem: everyone’s trying to sell you something. Some companies push the cheapest option. Others insist you need the most expensive unit. And all the technical jargon makes it hard to know what actually matters.
We install both Generac and Kohler generators. We’re not married to either brand.
Our job is to help you pick the right size for your home and make sure it’s installed correctly — not to upsell you on features you don’t need.
In this guide, we’ll break down the real differences between these two brands and help you make the right choice for your home.
⚡ Key Takeaways
- Both Generac and Kohler are reliable — your choice depends on budget and priorities
- Generac offers more size options and typically costs $500-$1,500 less upfront
- Kohler is quieter and built for heavy-duty use, but comes at a premium
- Most Colleyville homes don’t need the biggest, most expensive generator
- Proper installation matters MORE than brand choice
What You’re Actually Comparing
Let’s talk about what actually matters for your home.
You don’t need every technical spec or to understand the difference between hydraulic lifters and solid tappets (though we’ll explain that later if you’re curious). What you need to know is how these generators perform when the power goes out and your AC needs to keep running.
Here’s what affects your daily life:
- Price — upfront cost and long-term maintenance
- Reliability — will it start when you need it?
- Noise level — especially important in residential neighborhoods
- Size options — matching your home’s actual needs
This isn’t about which brand is “better.” Both Generac and Kohler make quality generators. This is about which one fits YOUR home, YOUR budget, and YOUR priorities.
Generac vs Kohler: The Real Differences
Here’s what we tell homeowners who ask us this question. We’ve installed hundreds of both brands in the DFW area, so we know what actually matters versus what’s just marketing talk.
💰 Price Comparison
Let’s start with what everyone wants to know: how much is this going to cost?
| Generator Size | Generac Cost | Kohler Cost |
|---|---|---|
| 14 kW | $4,500 – $4,900 | $5,100 – $5,600 |
| 20-22 kW | $6,100 – $6,600 | $6,200 – $6,800 |
| 24-26 kW | $6,900 – $7,500 | $7,800 – $8,500 |
Generac gives you more power per dollar. A Generac 22kW costs about the same as a Kohler 14kW, or roughly $500-$1,500 less than a comparable Kohler unit.
Installation Costs in Colleyville
Installation in the DFW area typically runs $4,500 to $6,500 for a standard setup. This includes setting the concrete pad, mounting the generator, installing the transfer switch, and running gas and electrical lines.
However, many Colleyville properties require additional work:
- Trenching for longer runs: $15-$25 per foot (common on larger lots)
- Gas meter upgrade: $1,500-$3,000 (often required — we’ll explain why later)
- Permits and inspections: $300-$500
Generac 22kW: $11,000 – $16,000
Kohler 20kW: $12,500 – $18,000
Don’t pick your installer based on who’s cheapest. We’ve seen it too many times — homeowner saves $500 on installation, then spends $2,000 fixing problems later because the generator won’t start during an outage or fails inspection.
A properly installed smaller generator beats a poorly installed bigger one every time.
🔧 Reliability & Durability
Here’s what you really want to know: will this thing start when the power goes out?
The short answer: yes, both will.
The longer answer is where the differences matter.
Want to hear from homeowners who’ve worked with us? Read our customer testimonials about their generator installation experiences.
| Feature | Generac | Kohler |
|---|---|---|
| Track Record | Millions of units sold | Commercial-grade heritage |
| Build Quality | Residential-grade | Commercial-grade components |
| Load Capacity | 25-50% variable load | 100% continuous load |
| Valve Maintenance | Required every 400 hours | Zero maintenance (hydraulic) |
| Service Availability | Widely available in DFW | Specialized dealers |
Generac engines require periodic valve adjustments (after the first 25 hours, then every 400 hours). Skipping this voids your warranty.
Each valve adjustment service visit costs $350-$500 in labor.
Kohler’s hydraulic lifters eliminate this maintenance entirely — you’ll never need a valve adjustment.
Over 15 years, this can save you $1,500-$2,500 in maintenance costs.
🔊 Noise Level
In Colleyville’s residential neighborhoods, noise matters.
| Generator | Full Power | Weekly Test |
|---|---|---|
| Generac 22kW | 67 dB | 57 dB |
| Kohler 20kW | 69 dB | 64 dB |
On paper, Kohler measures slightly louder. But here’s what the numbers don’t tell you:
- Generac produces a higher-pitched mechanical sound
- Kohler produces a lower-frequency rumble
- Many people find the lower frequency less irritating, even if it’s technically louder on a decibel meter
⚡ Size & Power Options
Here’s where Generac has a clear advantage: variety.
- 1,500-2,500 sq ft (one AC): 14kW or 18kW
- 2,500-3,500 sq ft (two ACs): 20kW or 22kW
- 3,500+ sq ft or pool: 24kW or 26kW
Generators are rated using propane. On natural gas (most Colleyville homes), you lose ~10% of power.
A “22kW” Generac actually produces about 19.5kW on natural gas.
In Texas summer heat (105°F+), generators lose another 5-8% of capacity.
This is why we help you calculate ACTUAL needs instead of just selling you the biggest unit.
🎯 Which Generator Makes Sense for Your Home?
Here’s how we help homeowners make this decision.
✓ Choose GENERAC if:
- You want solid backup power at a lower upfront cost
- Budget is a primary concern
- You prioritize variety in sizing options
- You want readily available parts and service
- You plan to sell the home within 5-10 years (Generac has strong brand recognition)
✓ Choose KOHLER if:
- You want the quietest option possible (tone, not just decibels)
- You’re willing to pay more upfront for commercial-grade durability
- You want to eliminate valve adjustment maintenance
- You run high-demand equipment or need consistent full power output
- Long-term investment (15+ years) matters more than initial cost
Here’s the honest truth: both generators will keep your power on during Texas outages.
Your decision comes down to budget, noise tolerance, and how long you plan to own the home.
But here’s what matters MORE than brand: proper installation and correct sizing.
We’ve seen expensive Kohler units that don’t work because they were installed wrong. We’ve seen budget Generac units that run perfectly for 15 years because they were sized correctly and installed properly.
Talk to us about which option makes sense for your specific home →
🔨 Why Installation Matters More Than Brand
The best generator won’t work right if it’s installed poorly.
Here are the most common installation mistakes we fix for Colleyville homeowners:
Common Installation Mistakes:
- Undersized transfer switch — bottlenecks your generator’s capacity
- Gas meter not upgraded — starves the generator and your other appliances
- Improper clearances — causes overheating or code violations
- Skipping the permit — creates problems when you try to sell your home
- ✓ We size the transfer switch correctly for your home
- ✓ We calculate your gas load and coordinate meter upgrades with Atmos Energy
- ✓ We pull all required permits and pass inspections
- ✓ We install both brands, so our recommendation is based on YOUR needs, not our profit margin
Everything works as it should when we’re done.
The Gas Meter Problem
This is huge in Colleyville. Most homes have standard gas meters that deliver about 250,000 BTUs total. A 22kW generator needs 300,000 BTUs.
What happens? Your generator starves your other gas appliances (furnace, water heater, stove). Or worse — the generator can’t run at full capacity.
The fix: Atmos Energy upgrades your meter to 2 PSI high-pressure service. Then you need step-down regulators installed at each gas appliance in your home. This costs $1,500-$3,000 in plumbing labor, but it’s required.
🛡️ Warranty Comparison
This is where Kohler pulls ahead significantly.
| Year | Generac Coverage | Kohler Coverage |
|---|---|---|
| 1-2 | Full (parts, labor, travel) | Full (parts, labor, travel) |
| 3 | Parts only (you pay labor) | Full (parts, labor, travel) |
| 4-5 | Major components only | Full (parts, labor, travel) |
If a control board fails in Year 4, it costs a Generac owner $600-$800 in parts and labor.
For a Kohler owner, it’s $0.
Over a 5-year period, Kohler’s comprehensive warranty can save you $1,000+ in repair costs.
❓ Frequently Asked Questions
Both are reliable. Kohler is built for heavier-duty use with commercial-grade components, but for most homes, both will perform well during outages. The real question is whether you need commercial-grade durability or if residential-grade reliability is sufficient.
Most 1,500-2,500 sq ft homes need 14-20kW. Larger homes (3,000+ sq ft) or homes with multiple AC units typically need 22-26kW. We calculate exact needs based on your home’s square footage, AC units, and essential circuits.
Generac 22kW runs at 67 decibels. Kohler 20kW runs at 69 decibels. Kohler is slightly louder on paper, but produces a lower-frequency sound that many find less irritating than Generac’s higher-pitched tone. Both are audible but not unreasonably loud.
No. Texas requires licensed electricians for generator installation. DIY installation won’t pass inspection and voids your warranty. More importantly, improper gas and electrical connections are dangerous.
Both last 15-20+ years with proper maintenance. Kohler’s commercial-grade build may outlast Generac in heavy-use scenarios, but for typical residential backup power, both should serve you well for decades.
If you’ve experienced Texas power outages during summer heat or winter storms, yes. Medical equipment, home offices, and family comfort during extreme weather make backup power valuable. Plus, it adds resale value to your home.
Yes. Colleyville requires a comprehensive permit package including a survey showing the generator location, gas load analysis, and electrical diagrams. Skipping permits causes problems when you sell your home.
🏡 Ready to Get Started?
We install both Generac and Kohler generators — no brand bias, no pressure.
What you get:
- Free consultation to determine actual size needs
- Honest assessment of both Generac and Kohler options
- Transparent pricing — no hidden surprises
- Proper installation with all permits and inspections
- Licensed, insured, and experienced with both brands
We give you options, not pressure.
Everything works as it should when we’re done.
Serving Colleyville, Southlake, Grapevine, and the entire DFW metroplex
