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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

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 from Peace of mind whether I am home or away. This product was a great value for the price. My wife and I now have peace of mind whether I am home or away. It surprised me how quiet it is when running and how well it blends into our landscaping. I really like the mobile link feature, as it updates me on all functions that occur. I am a retired General Contractor and spent a lot of time researching this product, and I am happy to say that it completely met my expectations. I am now ready for any power interruption that may occur. Thanks for creating such a fine product for homeowners.
Date published: 2016-11-30
Rated 5 out of 5 by from Very happy with the product, and the peace-of-mind it provides The generator is used to back-up our home and our adjacent home business, and we have been completely satisfied with the product and are happy that we decided to purchase the generator.
Date published: 2016-11-15
Rated 5 out of 5 by from Great We haven't had very long but working great so far.
Date published: 2016-11-11
Rated 5 out of 5 by from Excellent generator We are extremely happy with our whole house home generator. It is very quiet and gives up more security for the upcoming winters.
Date published: 2016-11-09
Rated 5 out of 5 by from Generator is very compact and appears to be very low maintenance. Generator was installed in one day. The generator appears to require minimal attention. Cutover is automatic and the generator has the ability to manage which breakers are utilized during a power outage.
Date published: 2016-11-03
Rated 5 out of 5 by from Peace of Mind Our Generac generator was just installed. Installation was quick and professional. It seems that the operation of the unit will be pretty much self-sufficient. While we haven't had the opportunity to use it yet, I am confident that it will perform just as we were told. We are usually one of the last homes to get power back because of our rural location so the peace of mind knowing that our sump pumps, furnace, well, and freezers will run in the event of a power outage is immense.
Date published: 2016-10-27
Rated 5 out of 5 by from Our new generator does everything we want it to do. Our new generator does everything we want it to do. There is almost no interaction required on our part. It just automagically kicks on when needed, and we hardly notice it. The installer was very courteous, professional, and efficient.
Date published: 2016-10-15
Rated 5 out of 5 by from Worth the investment! My wife and I had a Generac 22kw Guardian Series Backup generator installed when we built our home 5 years ago. We haven't really needed for any long period of time until Hurricane Matthew. We were without utility power for two days (very fortunate compared to many). Our Generac kept us fully powered and cool for the entire time!
Date published: 2016-10-11
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22kW-6551 whole house switch is rated 5.0 out of 5 by 72.
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Generac Stock Ticker

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  • 12/2/2016 4:02 PM EST