Guardian 18kW Home Backup Generator

Starting At

$5,769.00 MSRP Includes Transfer Switch - Installation, Taxes and Shipping Not Included Where To Buy Get a Free Quote What is an In-Home Assessment?



Provides essential circuit power protection for your home, ensuring the necessities remain powered during an outage or up to whole house coverage when paired with one of Generac’s load- shedding switches. Capable of backing up a five ton air conditioner.


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.

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

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.

Tough, Durable All-Aluminum Enclosures: Our RhinoCoat™ powder-coated finish helps make corrosion-resistant aluminum perfect for all weather conditions.

Smart, User-Friendly Controls.  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.

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. Learn more about Mobile Link

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 Happy with the product We now have no more worries. thank you so much for our 18KW Generac Jeanne
Date published: 2024-01-27
Rated 5 out of 5 by from Worked like a charm FYI - the only reason I gave a low score on installation is the electrician our home builder used didn't know what they were doing. Once the authorized Generac company came out and fixed the issue, we are totally satisfied. Strong storms/tornados came through our area about a month ago (12/9). After lots of flickering, at 5:16 pm our power went out. The dog and I were in the closet due to a tornado warning. By the time my husband walked across the house, the power had come back on. I thought it just another flicker, he said "No, that's the generator". It ran until about 1:50 am. We are so glad we have a Generac Generator. There may be some future sales in our neighborhood soon and we have recommended Capital Electric to everyone.
Date published: 2024-01-11
Rated 1 out of 5 by from Brand new 18 KW Generac evolution don’t work The voltage regulator in my 20 KW Generac died after eight years it cost almost as much to replace it as a new generator so I replaced it with a new 18 KW Generac installer hooked it up today and the control board is froze up now I have to wait for a technician to come out I am not happy at all with Generac right now
Date published: 2024-01-05
Rated 5 out of 5 by from I have no doubt this system will work when needed I looked at someone's Generac that was installed by Metro Elec. and was impressed with the workmen ship and he highly recommended them. I called them and had one installed. They were very courteous and the job was completed professionally in one day. When completed they explained the system how it works and answered any questions I had. I experienced one issue later on with the Wi-Fi. They came out the next day and replaced it. No issues anymore.
Date published: 2024-01-02
Rated 5 out of 5 by from Superior Product and Dealer Absolute Energy Solutions, LLC and Generac generators was recommended by a friend. From initial phone call to installation completion it was a very easy process. The staff are professional, friendly, and easy to do business with. The installation team worked well together and each member took time to explain the process. I had chosen Generac because of their quality reputation. I highly recommend Generac and Absolute Energy Solutions to my family, friends and neighbors. Lee J
Date published: 2023-12-30
Rated 5 out of 5 by from Excellent Product and crew installation! Metro Electric and the crew headed up by Jason were top notch! So professional and courteous, also on time and efficient. A very knowledgeable company and a product i've already recommended to my friends and family. thank you!
Date published: 2023-12-12
Rated 5 out of 5 by from Great guys I just had my generac installed today so I cannot comment on the unit itself. The gentlemen that installed it were very polite and professional. They installed it quickly and did not upset my day at all. I would tell all friends looking for a system to use E&W Electrical Solutions for their purchase
Date published: 2023-12-06
Rated 5 out of 5 by from This product provides peace of mind I had a whole house generator installed for 2 reasons, I have a health issue requiring electricity for my CPAP machine to work and with frequent power outages and I wanted the peace of mind that I would have during the night if my power went out. I had a a whole house generator at y previous residence and it was nice knowing I had power when there ere outages.
Date published: 2023-11-29
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18kW-7228 Whole House Switch WiFi-Enabled is rated 4.8 out of 5 by 142.
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