Home Backup Insight
When homeowners start researching whole house generators, two brands dominate the conversation: Generac vs Kohler generator. Both companies manufacture high-quality standby generators designed to automatically restore power during outages.
However, the two brands differ in engine design, reliability reputation, noise levels, and pricing, which makes choosing between them an important decision for homeowners planning a backup power system.
Introduction
Whole house standby generators provide automatic backup power during outages, protecting essential appliances, heating and cooling systems, and electronics. Among residential standby generators, Generac and Kohler are the two most widely recognized brands.
Generac is known for its large residential market share and broad range of generator models, while Kohler generators are often praised for their durable engine design and premium build quality.
In this guide we’ll compare Generac vs Kohler generators, including performance, reliability, cost, and which brand may be better for your home backup system.
If you’re still deciding on generator size, see our Best Whole House Generator Guide.
Quick Answer
Generac vs Kohler Generators
Both brands produce reliable standby generators, but they appeal to slightly different buyers.
Generac generators
• typically more affordable
• larger residential model selection
• widely available installers
Kohler generators
• premium build quality
• strong engine reputation
• slightly quieter operation
For most homes, either brand can provide excellent backup power, but installation quality and proper sizing often matter more than brand alone.
Generac vs Kohler Generators Comparison Chart
| Feature | Generac | Kohler |
|---|---|---|
| Market Share | Largest residential generator brand | Premium standby brand |
| Typical Size Range | 10kW – 26kW | 12kW – 26kW |
| Fuel Options | Natural Gas / Propane | Natural Gas / Propane |
| Price | Lower average cost | Higher average cost |
| Noise Level | ~67 dB | ~65 dB |
| Best For | Most residential homes | Premium installations |
Both brands support automatic transfer switches and are designed for full home backup systems.
Generac Generator Overview
Generac is the most widely installed residential standby generator brand in North America.
Advantages include:
• large installer network
• wide selection of generator sizes
• competitive pricing
Popular Generac models include:
• Generac Guardian 22kW
• Generac Guardian 24kW
• Generac Guardian 26kW
These generators are commonly used for whole house standby installations.
Learn more in our Best Whole House Generator Guide.
Kohler Generator Overview
Kohler is known for producing high-end standby generators with strong engine reliability.
Advantages include:
• durable commercial-grade engines
• strong reputation for reliability
• slightly quieter operation
Popular Kohler models include:
• Kohler 20kW Standby Generator
• Kohler 26kW Standby Generator
Many electricians and installers consider Kohler generators to be premium standby systems.
Reliability Comparison
Both brands are reliable when properly installed.
However, some installers report differences in design philosophy:
Generac
• larger production volume
• easier parts availability
• very common residential systems
Kohler
• heavier engine components
• strong long-term durability
• slightly higher cost
Ultimately, proper installation and maintenance matter more than brand choice.
Noise Comparison
Noise levels are similar between both brands.
Typical sound levels:
| Generator | Noise Level |
|---|---|
| Generac 22kW | ~67 dB |
| Kohler 20kW | ~65 dB |
For reference:
• normal conversation = 60 dB
• vacuum cleaner = 70 dB
Both generators fall within typical residential standby generator noise ranges.
👉 Learn more in our Generator Noise Ordinance Guide.
Installation Requirements
Whole house standby generators require professional installation.
Typical installation components include:
• standby generator unit
• automatic transfer switch
• electrical panel integration
• natural gas or propane connection
Installation costs typically range between:
$8,000 – $18,000 depending on generator size and complexity.
👉 Learn more in Generator Installation Requirements.
Example Whole House Generator Setup
A typical standby generator system includes:
• standby generator (20kW – 26kW)
• automatic transfer switch
• natural gas or propane fuel connection
• electrical panel integration
When power fails:
- the transfer switch detects the outage
- the generator starts automatically
- electricity is restored to the home
Most systems restore power within 10–30 seconds.
When Generac Is the Better Choice
Generac may be the better option for:
• homeowners seeking lower cost standby systems
• areas with large Generac installer networks
• residential generator installations
Generac generators are often considered the most common standby generator option for homes.
When Kohler Is the Better Choice
Kohler generators may be preferable for:
• homeowners wanting premium generator builds
• long-term durability
• slightly quieter operation
Kohler systems are often chosen for higher-end installations or large homes.
Related Guides
If you’re planning a standby generator system, these guides may help:
• Best Whole House Generator
• Air Cooled vs Liquid Cooled Generator
• Generator Installation Requirements
• Generator Pad & Placement Guide
• Generator Noise Ordinance Guide
These articles explain generator sizing, installation, and safe operation.
FAQ
Which generator is better, Generac or Kohler?
Both brands produce reliable standby generators. Generac is more common and affordable, while Kohler is often considered a premium option.
Are Kohler generators more reliable?
Kohler generators are known for durable engine design, but reliability often depends more on installation quality and maintenance.
Are Generac generators cheaper?
Yes. Generac generators typically cost less than comparable Kohler models.
Which generator is quieter?
Kohler generators are often slightly quieter, though the difference is usually small.
How long do standby generators last?
Most standby generators last 15–25 years with proper maintenance.
Conclusion
Generac and Kohler both manufacture reliable whole house standby generators designed to provide automatic backup power during outages. Generac generators tend to offer broader residential availability and lower pricing, while Kohler generators are often considered premium systems with strong durability.
For most homeowners, the best choice depends on generator size requirements, installation cost, and installer availability.
To explore top standby generator options, see our Best Whole House Generator Guide.