Guardian 22kW Home Backup Generator

Starting At

$5,539.00 MSRP Includes Transfer Switch - Installation, Taxes and Shipping Not Included Where To Buy Get a Free Quote What is an In-Home Assessment?



One of the most powerful air-cooled generators on the market today, the Guardian® Series 22 kW automatic home standby generator can provide whole-house backup power for many homes. 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.


Mobile Link™ Remote Monitoring FREE with every Guardian Series Home standby generator Allows you to monitor the status of your generator from anywhere in the world using a smartphone, tablet, or PC. Easily access information, such as the current operating status and maintenance alerts. Connect your account to your authorized service dealer for fast, friendly and proactive service. With Mobile Link, you are taken care of before the next power outage.

Up to whole house protection with the 200-amp, NEMA 3R (aluminum outdoor enclosure) smart switch.

5 Year Limited Warranty for automatic standby generators.

True Power™ Technology delivers best-in-class power quality with less than 5 percent total harmonic distortion for clean, smooth operation of sensitive electronics and appliances.

Generac generators and engines are engineered and assembled in the USA*.
*Assembled in the USA using domestic and foreign parts

Generac's G-Force Engine is a purpose-built, pressure-lubricated engine capable of handling the rigors of generator use, resulting in power that’s more reliable and requires less routine maintenance than any competitive engine. Learn more about the G‑Force Engine »

Quiet-Test™ Self-Test Mode runs at a lower RPM for a five or twelve minute test, making generators significantly quieter than other brands while consuming less fuel.

24/7/365 Customer Support Team standing by all day, every day from our headquarters in Wisconsin to answer any questions you might have.

Our RhinoCoat™ powder-coated finish helps make corrosion-resistant aluminum perfect for all weather conditions.

Generac’s Evolution™ Controller features a multilingual LCD display that allows users to monitor battery status and track maintenance intervals to ensure your generator is always in top operating condition.

Home Generator Resources

The purchase of a home backup generator will give you peace of mind for years to come, but it’s a big investment. That is why we want to give you as much information as possible so you can make the right decision based on your needs and budget. The options below will help you understand how the entire process works, what your financing options are, and how to choose the right backup power solution.


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Rated 5 out of 5 by from Everything we need Sense of security knowing if we lose our power we will be covered
Date published: 2021-10-09
Rated 5 out of 5 by from Sharp looking! Happy to have this in my backyard now, but hoping I don't have to use it too often! It gives me great peace of mind.
Date published: 2021-10-09
Rated 3 out of 5 by from Started out great, not so good now Had been in the process to get a 22KW installed and then Ida hit. Power went out Sunday evening about 5:30 on 8/29. We were running the house on a 17.5 KW portable Generac but getting fuel had become an issue. Our dealer texted me the following Thursday AM about 6:30 and asked if we were still without power. I replied yes and they showed up a couple of hours later to install the unit. 5 hours later we were up and running. Everything went well until Sat AM when the unit shut down. I went to check it and the enclosure was full of oil that had leaked out of somewhere. I refilled it and got it running but it continued loosing oil. We got power back on Sunday evening. Unit now goes into over start shut down. Dealer came and did the first service but the unit still will not start and run. We suspect it has a bad circuit board so am waiting on that so we can get it started to find out where the oil is coming from. We suspect it is a rear seal since oil is coming from the exhaust end. Service tech also noted metal shavings in the oil. Bottom line is we are still without standby protection.
Date published: 2021-10-05
Rated 5 out of 5 by from Great Features. Not terribly noisy We thought the process to install gas and electric and the unit itself was well thought out. When running, we were surprised it was not as noisy as we expected. It looks good positioned behind shrubs to cover it from view. Nice tall slab to mount it on takes away any fears of flooding affecting unit. I recommend the Generac unit. I now feel secure I will have power in case of freeze or hurricane.
Date published: 2021-09-29
Rated 5 out of 5 by from Great Superior job. Crew had a great team working ethic. Supervison was excellent by the lead worker and his supervisor. Professional action during all fazes of the operation and check out. Follow up visit was excellent in all regards. A pleasure to do business with these folks in our present time.
Date published: 2021-09-26
Rated 3 out of 5 by from Disappointed After about 14 years or so, our 17KW crapped out. In simple terms, the stator self-destructed. Major, major costly repair. The local dealership that originally installed this 17KW quoted me a price to replace the generator. 17KW was no longer available, so they quoted me on the next size up. I believe it was on a 18 or 20KW. The price they quoted me was around $8,500.00. That was more than the original cost of the 17KW which included the transfer box(which would not need to be replaced) and connection to the propane tank. I searched around for another dealership and found one that had a 22KW in stock for $5,250.00. Installation included. So that’s what I went with. That was installed 6/20/18. Here it is September of 2021 and the generator failed. My mistake was to call in the same people who sold/installed the 17KW. They diagnosed it the next day, determined that the control board need to be replaced, however, since they did not install/replace the 22KW, they would not work on it. Here’s the summary. When I purchased the 22KW it came with a 5 year warranty, but after the first 3 years, the only things left on the warranty are the engine and alternator. I don’t care one way or the other. I just wanted it fixed. Come to find out Generac dealers/service companies are 3rd party. They can set their own guidelines/policies. No commitment or jurisdiction under Generac. So here’s where I stand. The dealership that sold me the 22KW will be here tomorrow. My advice to any potential buyers is beware. Not all Generac service companies appear to be equal. If they have internal policies that prevent them from servicing your generator, you may find yourself in a compromising situation. Don’t get me wrong. As long as it works, Generac stand-by generators are wonderful, but in MHO, if a company such as Generac certifies installation/ service companies, they should also be able to control service policies over these 3rd party companies.
Date published: 2021-09-23
Rated 3 out of 5 by from Generac 22 KW Guardian Air Cooled Initially, I was excited to invest in this generator. Installed last year just before hurricane Zeta. Ran for 2 weeks, however, low oil pressure shut the unit down at least twice. No solution to excess oil usage from Comfort Engineering Systems, who did the install. This year during hurricane IDA outage, unit shut down for low oil pressure on several occasions and when I checked oil in advance of shut down it showed low oil. Over an 11 day period I had to add 14 quarts of oil. Comfort Engineering came out and performed all test to determine where the unit was using oil, but could not find any reason. Generac needs to contact me to resolve this issue, or replace the unit.
Date published: 2021-09-23
Rated 5 out of 5 by from Great features & ready for work Installed by BRAND HOME SERVICES. Justin & his class act crew installed it, highly recommend this 22kw unit.. Worth its weight in gold!!!! Bring on the bad weather!!!!!
Date published: 2021-09-20
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22kW-7043 whole house switch is rated 4.9 out of 5 by 1896.
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