
Partner with The Home Depot's local professionals for your generator installation.
Protect your home with reliable backup power top offers and flexible financing.
Inclement weather like heavy rain, snow and high winds can knock out your electricity in a hurry. If you live in a place where hot weather stresses the power grid in your area, you may also be left in the dark when temperatures reach the 90s or low triple-digits. You don’t have to wait for the power company to restore your service to get your heat, air conditioning and electricity back though.
By installing a standby generator you’ll have power on tap, giving you the ability to heat and cool your home even when your utility company is unable to do so. You’ll also be able do other things like work or use your internet service with your generator, making a generator a vital part of life for many people.
While most people know that a generator can be a good thing to have and a great investment, many homeowners avoid installing one because they’re afraid the cost is far too high. The fact is that the average cost to install a generator doesn’t have to be through the roof.
Use this guide to learn more about the cost of generator installation for your home. You might be surprised at how affordable powerful generators can be.

Air-cooled generators take in cooler air from the surrounding area to cool down its working elements. This type of generator can be permanently installed or comes available as a portable unit, depending on the model you choose. For a home installation, a stationary standby model is best.
Air-cooled systems provide plenty of power during short-term outages for most homeowners who need a backup generator.
Here’s the average cost of installing an air-cooled generator:
Installation & Materials: $6897
Propane Tank Cost Exception: A propane tank installation may cost an additional $5000-$8000.
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Choosing the right size generator is important. A unit that's too small may not be enough to power your refrigerator, washing machine, lights, heat, and air conditioning all at the same time. Installing a unit that’s too large may provide more power than you need and cost more than you need to spend.
20-24 kW generators are our most popular pick for their power and versatility in homes up to 3,000+ square feet.
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Hard-to-reach spaces or areas that require some landscaping may also incur additional costs during installation. In most cases, these costs are not significant, and most service providers will be happy to handle basic tasks like moving outdoor furniture as part of the job for no fee.
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Depending on where you live, you may need local city permits to install a standby generator on your property. Check with your local city offices to learn more about fees. Your installation provider may also be able to help you with permits and permit-related costs since they’re more familiar with the process.
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Where you choose to put your generator depends on a variety of factors. In general, installation is a little more expensive the further away from your fuel source and circuit panel you choose to go. For many homeowners, finding a balance between hearing the generator, placing it out of sight and lower installation costs is important.
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You may also incur additional costs for upgrade of a LP tank, or for a new NG meter, if needed. While these charges are generally minimal compared to total costs, they can impact your overall natural gas generator installation cost.
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Briggs & Stratton, Kohler and Generac are our most popular brands. With many options available at your fingertips, it’s worth comparing top brands to see which generator is right for your home. Not sure which brand to choose? Our professional team members can help you learn more about basic Briggs & Stratton, Kohler and Generac standby generator installation cost for your home.
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An automatic backup generator is a back up electrical system that operates whether you are home or away. Within seconds of an outage, it automatically supplies power directly to your home’s electrical circuit breaker box. After utility power returns, the generator shuts itself off and waits for the next outage. It operates on natural gas or liquid propane gas and sits outside just like a central air conditioning unit.
During a utility power outage, an automatic backup generator provides numerous advantages over a portable generator:
An SAE rated high detergent oil that meets API Service Class SF requirements for gasoline engines, similar to your car. In general, when the temperature is over 40 degrees F, the most recommended oil is a 30-weight detergent product. When the temperature drops below 40 degrees F, you should use 10W-30. Refer to your owner’s manual for details.
Air-cooled generators come with engines that use fans to force air across the engine for cooling
Liquid-cooled generators use enclosed radiator systems for cooling, similar to an automobile. Generally, liquid-cooled engines are used on larger kW generators due to the larger engines required for the higher power output.
No. The generator fuel costs would be much more expensive than buying power from the utility company since their cost to produce electricity is divided among thousands of customers. Our automatic generators are produced for use as backup to utility power specifically and should not be used as primary power. Please refer to the warranty policy for additional information.
Most portable generators do come with a rechargeable battery. However, our standby units do not. But don’t worry about where to find a battery—a standard car battery you can get at your auto parts store will be compatible.
This is a maintenance reminder light. You can reset the light by pressing the Enter key on the control panel. Service reminders include inspect battery, change oil and filter, change air filter, inspect spark plugs, and change spark plugs.
We recommending contacting your gas provider, or a licensed plumber, and they will be able to size the gas line for you. Gas pipe size will depend on length of run from the source and how many elbows and T’s there are.
Every home is different, and so is every installation. The placement of the generator, the amount of materials required, and the installation of the natural gas or LP fuel source all make estimating installation costs unique. A simple installation might cost about $2,000, but it can be more than that depending upon your specific situation. The best way to know for sure is to get a free in-home assessment. They will listen to your needs, assess your home, and give you a detailed quote. All at no charge, with no obligation, and no pressure.
Here are a few reasons you should choose The Home Depot for your standby generator installation: