Guardian 22kW Home Backup Generator

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$4,609.00 Transfer Switch, Installation, Taxes and Shipping Not Included Where To Buy Get a Free Quote What is an In-Home Assessment?



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.


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.

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

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.

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 »

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 Reliable and Dependable - A Must for any rural home/farm/business This is the 3rd generator that we have purchased. When you live in a rural area with a farm, keeping water, lights, etc. is extremely important. With each relocation over the last 20 years, we are insistent that a Generac generator be installed. We depend on being able to continue 'as normal' in all conditions. The generator has really been a great selling point for previous homes as well.
Date published: 2019-08-19
Rated 4 out of 5 by from Post Installation I just finished installation of a Generac 22kw 70422 unit to replace a 10 year old Generac 20kw model. The installation went very well as I was using my existing ATS. The wiring diagrams could of been a little clearer identifying where the wires needed to land and how many the unit actually needed to function properly. Four of the five terminals were clearly identified the 5th wire required a little research. It would have been helpful if I would have know the gas line from the unit was 3/4 inch rather than the 1/2 inch used by the 20kw model. The WiFi instructions were as little cloudy but after the calling the helpline I received outstanding service. Hopefully this unit will last for many years! I have installed about 6 of these units over the last 10 years and the 20kw model I just replaced is the only one I have had issues with. I would strongly recommend Generac to others seeking standby power options!
Date published: 2019-08-17
Rated 5 out of 5 by from whole house gen great company that strives for excellent products along with customer service. warranty is a plus as I got a ten year warranty. Thanks for a great gen.
Date published: 2019-08-14
Rated 5 out of 5 by from Great product and great service We live in Florida and don’t want to go for an extended period of time without Air Conditioning. This unit can handle our needs effortlessly. The unit is sleek and unobtrusive. It blends in with the pool equipment. The install and permit process took some time but was well worth the wait.
Date published: 2019-08-14
Rated 5 out of 5 by from Just installed 22Kw with xfer switch Don't have operational time yet but all went very well with install of 22Kw and transfer switch that we placed inside the garage. Startup process proved system easily took the house without issues. Only two people (until a storm hits :>) ) and 2600 Sq Ft place. Write another review when the system is needed/used for the first real event.
Date published: 2019-08-14
Rated 5 out of 5 by from Automatic features are great This automatic generator gives us peace of mind in the many storms we have to deal with in South Louisiana! It has a weekly check to make sure all is in order. The installation by the very qualified dealer was done quickly and without any problems. I will definitely recommend this product!
Date published: 2019-08-13
Rated 5 out of 5 by from Ready for Hurricane Season and other power glitches We tried to face quite a few Hurricane Seasons with A Gasoline Generator and Solar back up. Both were not adequate. Also living in a contry setting, all electric includin Well for water and freeze up happening in the winter we decided it was time to be really ready. The demonstration after hook up enforced our faith that we should not have to worry any more.
Date published: 2019-08-12
Rated 5 out of 5 by from Top of the line product with great service support in my area. Living in the Texas Gulf Coast hurricanes are a natural occurrence. I am a Sr. Regional Product Support Manager for a heavy duty diesel engine manufacture with 45 years experience servicing diesel engines in Oil & Gas, Construction & Industrial, Marine, and Power Generation applications. In Sept. 2008 we went through hurricane Ike and endured six days without power afterwards. After Ike, we installed a 20kW Guardian unit and had wonderful success and a great piece of mind with the unit at our former home. After living in the Houston area for ten years, we moved away for four years, and we just moved back to the Houston area in May 2019. In preparation of our new home for hurricane season, we purchased a 22kW Guardian unit. Our first unit as well as our new unit are whole house with 200 amp ATS. Our first unit was great but this new unit is AWESOME! The controller has been improved, the unit can now be monitored wireless from anywhere using a cell phone, tablet, or laptop. It is also monitored 24/7/365 by our authorized Generac dealer. The noise level of the unit when running has been reduced substantially. Maintenance items, oil drain, oil filter, air filter, oil fill, dipstick, and battery are all easily accessible. The controller is improved, simple to operate, understand, and is accessible with ease as well. This is a well designed, well built, serviceable unit that is supported by an outstanding dealer with factory trained and certified parts and service personnel offering 24/7/365 service to their customers. And, our Generac is backed by one of the best warranties in the business. It doesn't get any better than this folks.
Date published: 2019-08-12
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22kW-7043 whole house switch is rated 4.9 out of 5 by 1548.
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