Best whole house generator cost 2026: Expert Tested & Reviewed
Best Whole House Generator Cost in January 2026
As the new year arrives, many homeowners are looking to upgrade their home’s power backup systems, and whole-house generators are a popular choice. In this comprehensive review, we’ll explore the best whole-house generators on the market, taking into account their features, performance, and overall value.
Top Whole House Generator Recommendations
Best Overall: Generac Guardian 22kW Whole House Generator
Generac Guardian 22kW Whole House Generator
The Generac Guardian 22kW Whole House Generator is a top-of-the-line power backup solution for larger homes. With a 22kW output, it can handle the power needs of even the most demanding households, ensuring that your lights, appliances, and essential systems remain operational during a blackout.
Pros:
- High-powered 22kW output
- Automatic transfer switch for seamless power switchover
- Durable, weatherproof enclosure
- Quiet operation
- Remote monitoring and control capabilities
Cons:
- Relatively high initial cost
- Professional installation required
Best Value: Briggs & Stratton 12kW Standby Generator
Briggs & Stratton 12kW Standby Generator
The Briggs & Stratton 12kW Standby Generator offers excellent value for homeowners seeking a reliable whole-house power backup solution. With a 12kW output, it can handle the power needs of most medium-sized homes, providing peace of mind during outages.
Pros:
- Affordable price point
- 12kW output suitable for medium-sized homes
- Automatic transfer switch for seamless power switchover
- Quiet operation
- Durable, weather-resistant enclosure
Cons:
- Lower output compared to more expensive models
- Professional installation required
Budget Pick: DuroMax XP12000EH Dual Fuel Portable Generator
DuroMax XP12000EH Dual Fuel Portable Generator
For homeowners on a tighter budget, the DuroMax XP12000EH Dual Fuel Portable Generator is a great option. While not a whole-house solution, it can provide backup power for essential appliances and systems during an outage.
Pros:
- Affordable price point
- Dual fuel capability (gasoline or propane)
- 12,000-watt peak output
- Durable construction
- Portable design with wheel kit
Cons:
- Not a whole-house solution
- Requires manual transfer switch installation
- Louder operation compared to standby generators
Other Top Whole House Generators to Consider
Cummins RS25A Whole House Generator
The Cummins RS25A Whole House Generator is a reliable and powerful option for larger homes, offering a 25kW output to keep your essential systems running during power outages.
Pros:
- Powerful 25kW output
- Durable, weatherproof enclosure
- Automatic transfer switch for seamless power switchover
- Remote monitoring and control capabilities
- Quiet operation
Cons:
- Higher initial cost
- Professional installation required
Champion 100537 9000-Watt Dual Fuel Portable Generator
While not a whole-house solution, the Champion 100537 9000-Watt Dual Fuel Portable Generator can provide backup power for essential appliances and systems during an outage.
Pros:
- Dual fuel capability (gasoline or propane)
- 9,000-watt peak output
- Durable construction
- Portable design with wheel kit
- Electric start for convenient operation
Cons:
- Not a whole-house solution
- Requires manual transfer switch installation
- Louder operation compared to standby generators
Buyer’s Guide: Choosing the Right Whole House Generator
When it comes to selecting the best whole-house generator for your home, there are several key factors to consider. Here’s a comprehensive buyer’s guide to help you make an informed decision:
Power Output
The power output of a whole-house generator is measured in kilowatts (kW) and is a crucial factor in determining the size of the generator you’ll need. The power output should be sufficient to handle the total wattage of all the essential appliances and systems in your home, including HVAC, refrigerators, lighting, and any other high-power devices. As a general rule, a 22kW generator is suitable for larger homes, while a 12kW generator is more appropriate for medium-sized homes.
Fuel Type
Whole-house generators can be fueled by either natural gas or propane. Natural gas-powered generators are generally more convenient, as they are connected directly to your home’s gas line and do not require frequent refueling. Propane-powered generators, on the other hand, require a separate propane tank, which can be more challenging to maintain but may be a better option for homes without natural gas access.
Automatic Transfer Switch
An automatic transfer switch is a critical feature in whole-house generators, as it seamlessly transfers power from the utility grid to the generator during an outage, ensuring a smooth and uninterrupted transition. This feature eliminates the need for manual switching, providing convenience and peace of mind.
Noise Level
Whole-house generators can vary in their noise levels, which is an important consideration, especially if the unit is located near living areas. Look for generators with a quiet operation, typically measured in decibels (dB), to minimize disruption to your daily life.
Weatherproofing and Enclosure
Since whole-house generators are installed outdoors, they must be able to withstand various weather conditions, including rain, snow, and extreme temperatures. Look for generators with durable, weatherproof enclosures that can protect the internal components and ensure reliable operation, regardless of the weather.
Maintenance and Warranty
Regular maintenance is essential for the longevity and performance of your whole-house generator. Consider the recommended maintenance schedule and any available warranty coverage to ensure that your investment is well-protected. Longer warranty periods and comprehensive maintenance plans can provide added peace of mind.
Frequently Asked Questions
How much does a whole-house generator cost?
The cost of a whole-house generator can vary widely, depending on the power output, fuel type, and additional features. Generally, you can expect to pay between $3,000 to $10,000 for a whole-house generator, including the cost of professional installation.
How long do whole-house generators last?
With proper maintenance, whole-house generators can have a lifespan of 15 to 30 years or more. Regular service, including oil changes, air filter replacements, and spark plug maintenance, can help extend the generator’s useful life.
Do I need a permit to install a whole-house generator?
Yes, most local jurisdictions require a permit for the installation of a whole-house generator. The permit process ensures that the installation meets all necessary safety and electrical codes. Be sure to check with your local authorities before proceeding with the installation.
How long can a whole-house generator run during a power outage?
The runtime of a whole-house generator depends on the fuel source and the size of the generator’s fuel tank. Natural gas-powered generators can run indefinitely, as long as the gas supply is maintained. Propane-powered generators, on the other hand, are limited by the capacity of the attached propane tank, typically ranging from 8 to 48 hours of runtime.
Can I operate a whole-house generator myself?
While it is possible to operate a whole-house generator yourself, it is generally recommended to have the generator professionally installed and maintained. Proper installation and routine maintenance are crucial for ensuring the safe and reliable operation of the generator, as well as compliance with local regulations.
In conclusion, the best whole-house generator for your home will depend on your specific power needs, budget, and personal preferences. By considering the factors outlined in this buyer’s guide and reviewing the top recommendations, you can make an informed decision that will provide reliable backup power and peace of mind during power outages.