When shopping for a whole home generator, two names dominate the conversation: Generac and Kohler. Both manufacture excellent products, but they have distinct differences that might make one a better fit for your home. Let's break down this comparison to help you decide.
Key Takeaways
- Generac holds about 75% market share and pioneered home standby generators; Kohler offers premium industrial-grade construction.
- Both brands transfer power in about 10 seconds and offer comparable residential fuel efficiency.
- Generac typically costs less upfront; Kohler commands a premium but may offer longer engine lifespan.
- The best choice depends on your budget, local dealer support, and specific feature priorities.
Company Background
Generac
Founded in 1959, Generac pioneered the home standby generator market and remains the industry leader with approximately 75% market share. They're headquartered in Wisconsin and focus primarily on residential and light commercial generators.
Kohler
Kohler has been in business since 1873, initially as a plumbing fixture company. They entered the generator market in 1920 and are known for their industrial-grade construction. Kohler is a premium brand with a strong reputation in commercial applications.
Key Difference: Generac uses proprietary G-Force engines purpose-built for generator duty. Kohler uses heavy-duty commercial-grade engines with hydraulic valve lifters. Both approaches are reliable but suit different priorities.
Engine Comparison
Generac Engines
Generac uses proprietary G-Force engines designed specifically for generator use. Key features:
Never lose power again. We are authorized Generac installers serving all of Northern Virginia. From sizing to installation to maintenance, we handle every step. Call (703) 997-0026 for a free in-home assessment.
- Purpose-built for standby power applications
- Pressure-lubricated system for long life
- 3,600 RPM operation
- Designed for easy maintenance
- Lower upfront cost
Kohler Engines
Kohler uses their own commercial-grade engines with these characteristics:
- Heavy-duty industrial construction
- Hydraulic valve lifters (no adjustment needed)
- 3,600 RPM operation
- Cast iron cylinder liners for durability
- Higher upfront cost but potentially longer lifespan
Power Quality and Transfer Time
Transfer Speed
- Generac: Transfers power in about 10 seconds with standard ATS
- Kohler: Transfers power in about 10 seconds with standard ATS
Both manufacturers offer faster transfer options for sensitive equipment.
Power Quality
Both brands produce clean, reliable power suitable for sensitive electronics. Kohler advertises slightly better voltage and frequency regulation, which may matter for certain medical equipment or high-end electronics, but for most homeowners, both brands perform excellently.
Smart Features and Connectivity
Generac Mobile Link
Generac's monitoring system includes:
- Free basic monitoring via smartphone app
- Real-time status alerts
- Maintenance reminders
- Remote monitoring by dealers
- Integration with smart home systems
Kohler OnCue Plus
Kohler's connected solution offers:
- Smartphone and web monitoring
- Automatic software updates
- Performance tracking
- Dealer connectivity for remote diagnostics
- Requires paid subscription for full features
Warranty Comparison
Generac Warranty
- 5-year limited warranty standard
- Extended warranties available up to 10 years
- Transferable to new homeowners
- Covers parts and labor
Kohler Warranty
- 5-year or 2,000-hour limited warranty (whichever comes first)
- Extended warranties available
- Transferable warranty
- Covers parts and labor
Price Comparison
Generally, Kohler generators cost 10-20% more than comparable Generac models:
| Size | Generac (Installed) | Kohler (Installed) |
|---|---|---|
| 14-16kW | $8,500-$12,000 | $10,000-$14,000 |
| 20-22kW | $12,000-$16,000 | $14,000-$19,000 |
| 24-26kW | $15,000-$20,000 | $18,000-$24,000 |
Prices include typical installation in Northern Virginia. Actual costs vary by home.
Availability and Service
Generac
As the market leader, Generac has the largest dealer and service network. Parts are readily available, and most electricians are familiar with their products. Wait times for installation are typically shorter.
Kohler
Kohler has a smaller but dedicated dealer network. Their dealers often focus on the premium market and may provide more personalized service. Parts availability is good but not quite as widespread as Generac.
Noise Levels
Both manufacturers have made significant improvements in noise reduction:
- Generac: 66-70 dB at rated load
- Kohler: 66-69 dB at rated load
Both are comparable to a normal conversation from a few feet away. Newer models from both brands include sound-dampening enclosures.
Our Recommendation
Choose Generac If:
- Budget is a primary concern
- You want the largest service network
- You prefer free monitoring features
- You want faster availability and installation
- You have typical residential power needs
Choose Kohler If:
- You prioritize industrial-grade construction
- You have sensitive medical or electronic equipment
- Long-term durability is more important than upfront cost
- You prefer a premium brand with personal service
- Commercial-grade reliability is essential
The Bottom Line
Both Generac and Kohler make excellent generators that will serve your home well for many years. At AJ Long Electric, we install and service both brands and can help you determine which is the best fit for your specific situation, budget, and priorities.
Contact us for a free consultation. We'll assess your home, discuss your needs, and provide honest recommendations—not just push whatever we have in stock. Your backup power is too important for anything less.
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Written by
Matt Long
Master Electrician
Our team of licensed electricians brings over 40 years of combined experience serving Northern Virginia. We're committed to providing expert electrical solutions with a focus on safety, quality, and customer satisfaction.
Reviewed by AJ Long Electric Master Electricians · VA License #2705031092 · View Credentials
