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Guardian 22kW with Whole House Switch

Guardian 22kW with Whole House Switch

Model #6551

Starting At

$4,799.00 MSRP Includes Transfer Switch - Installation, Taxes and Shipping Not Included Add to My Products

Purchase by 9/16/16 and you’ll enjoy our ULTIMATE WARRANTY - 10 years parts and labor. Even more peace of mind.

*Instead of our standard 5-year limited warranty, you’ll receive our 10-year extended parts & labor limited warranty—a $995 value—FREE. See details below.

Offer Details

Guardian 22 kW Generator Features and Benefits

The 22 kW Guardian® Series home standby generator is the largest air-cooled home standby generator on the market. Not only does it deliver all the features and functionality customers have come to expect from the market-leading brand of home standby generators, but with an MSRP that is the lowest cost per kilowatt of any air-cooled home standby generator. Provides whole house coverage for many homes.

Guardian 22 kW Generator <strong>Features and Benefits</strong>

Lowest Cost Per Kilowatt
Homeowners can invest in a home standby air-cooled generator size that used to only be available in much more expensive, liquid-cooled models, giving them the lowest cost per kilowatt available.

Generac OHVI® Engine
Your Guardian Series generator might have to get you through days—or weeks—without utility power. Generac’s OHVI® engine, specifically designed for generator use, provides the reliability to power through the most severe outages.

True Power™ Technology
Best-in-class power quality with less than 5% total harmonic distortion means clean, smooth operation of your sensitive electronics and appliances.

Evolution™ Controller
The next generation of intuitive controllers featuring a multilingual, two-line LCD text display with color-coded, backlit buttons.

Certified for 18" Installation to the Home
Third-party certified to NFPA standards to be installed as close as 18” from the home’s exterior wall, provided it is located away from doors, windows, and fresh-air intakes, and unless otherwise directed by local codes.

Easy Installation
When combined with a pre-wired transfer switch or Smart Switch, re-engineered connection points, and composite mounting pad that eliminates the need for a poured concrete base (unless specified by local codes), the Guardian Series 22 kW generator is easy to install.

Rated for Operation in Areas with Low Natural Gas Pressure
In areas with low natural gas pressure, the Guardian Series 22 kW generator can operate on natural gas pressures of only 3.5” of water column.

All-Weather Aluminum Enclosure
Our durable powder-coat finish helps make the sturdy, all-weather aluminum enclosure corrosion resistant, making it ideal for coastal, salt-air climates. It’s also able to withstand 150 mph winds.

Tool-less Fuel Conversion
Switch between natural gas and LP fuel in the field in a few seconds, without the need for any tools.

Quiet-Test™ Mode
All standby generators run a weekly test to ensure the system is running properly. Thanks to Quiet-Test, your Guardian Series home standby generator runs its self-test at a lower, quieter RPM than standard operation, and can be programmed to run weekly, bi-weekly, or monthly.

Mobile Link™ Compatible
Take advantage of Generac’s Mobile Link cellular remote monitoring system and check on your generator’s status using your computer, tablet or smartphone, even when you are away. Sold separately.

Non-cellular remote monitoring options are also available for generator monitoring from inside the home.

24/7/365 Customer Support
Power outages don’t always occur during normal working hours. That’s why Generac’s customer care call center—right here in Wisconsin—provides support any time of day or night, all year long. Generac is standing by 24/7, every minute of every day, to answer your questions.

5-year Limited Warranty

Home Generator Buyer's Guide

Included with This Generator Bundle

Gain up to whole-house coverage through smart power management. If it is unlikely you will turn on every appliance at the same time (most people don’t), a smaller generator paired with a Generac Smart power management transfer switch provides whole-house coverage through a managed power solution. The process is simple - non-essential circuits are shed when the generator approaches maximum capacity to eliminate overload, then are cycled back on when essential circuits are satisfied. Give yourself a little more than just the basics without a substantial increase in your investment.

Download the Spec Sheet

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Rated 5 out of 5 by Excellent product I had this generator installed and the first night we lost electrict power and the Generac kicked on in just a few seconds. I am very happy with the Generac. The company that installed the electrical services were very knowledgeable about the generator and very professional in their insulation. August 22, 2016
Rated 5 out of 5 by Very pleased on all levels regarding this home generator. My 22 kw home back up generator was installed on 6/23/2016. The installation was professional in every way. Attention was given to every aspect of the installation from the mounting the switch box, running the cables, attaching the protective pipe down the brick exterior to start up and teaching me how to use it. All was covered. When the two installers left my home there was no mess as they hauled away everything leaving the area the way they found it upon arrival. Generator start up was near immediate and the switch test was flawless. While running the generator I entered my home listening for the noise. I could not hear it running while inside, very pleased. I am very impressed with both the quality of the product and the Generac contractor who performed the installation. Thank you to all. June 23, 2016
Rated 5 out of 5 by Power to the people! We are very pleased with our Generac Back-up Generator. Not only does it goes us peace of mind to start up and run our entire home when necessary, it looks neat and attractive in our yard. What more could we ask for?! June 23, 2016
Rated 5 out of 5 by Thanks Generac I am so glad I had this generator installed . Being in a rural area it comes in handy I don't have to worry about my sump pump or well not working. Last winter electric went out and for the first time I was able to sit in a warm home and watch TV without worry. It was like it never happened . Thanks Generac June 23, 2016
Rated 5 out of 5 by Always available when you need it I've had mine for about 6 months or so and found it's very reliable an always there when you need it. We have some medical conditions and we have the comfort of knowing that we'll always have electricity. Love it and would definitely recommend it. June 23, 2016
Rated 5 out of 5 by this products is all it was claimed to be I have only been out of power twice since my installation, on 9/25/14 my generator came on in about 15 seconds after power lost and supplied all my needs until power was restored. June 22, 2016
Rated 5 out of 5 by this generator is exactly what we have been looking for this generator has the power to run our whole house and not break the bank doing it .It also looks nice setting in the flowerbed May 11, 2016
Rated 5 out of 5 by Very pleased so far We are still installing the 22kw generator and would like to be able to switch from natural gas to propane without using tools. I read this was possible. Is there a combination valve we need to buy or is it included with the generator? April 30, 2016
  • 2016-08-30 T09:09:41.574-05:00
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Rated 4.9 out of 5 by 59 reviewers.
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The Generac Promise


Peace of mind.

And the power to live.

The Generac Promise means that our 8 – 22 kilowatt Guardian® Series home backup generators will give you peace of mind and the power to live. It means that we engineer and build them here in America*. It means we stand behind them with a strong 5-year limited warranty. We promise to continue to innovate, like with our new Mobile Link™ cellular monitoring system, so you’ll know the status of your generator, no matter where you are. And if you ever need to call, we’re standing by 24/7, every minute of every day, ready to pick up the phone right here in Wisconsin.

*Built in the USA using domestic and foreign parts.

We’ll back you up. We’re standing by. Count on it.

Generac Stock Ticker

  • NYQ
  • GNRC
  • $36.88
  • 8/31/2016 10:41 AM EST