Guardian 18kW Home Backup Generator

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$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 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
Rated 5 out of 5 by from Peace of mind and outstanding product/value We just had our 18kw, whole house, wi-fi enabled Gererac generator installed and couldn't be more pleased with the Generac unit, its easy to understand features, the peace of mind in knowing that we now have electrical outage restoration reliability sitting in our back yard like an electrical guardian! The installers, Woody, Tom and Jeff were absolutely professional and competent in all phases of their work and were not at all deterred by a cold, rainy and windy installation day. This team was incredible as they explained each phase of the process, and took the time to answer all our questions with clarity. All their work places were cleaned up when completed and the explanation of all phases of operation and maintenance was explained, in clear detail, by Jeff and left my wife, Deb, and I very confident that we choose the right company, Home Power Systems, the best Generator, Generac, as well as having the installation by the best team of installers. A very worthwhile investment for peace of mind!
Date published: 2023-11-22
Rated 5 out of 5 by from Great product all around Enjoying and have peace of mind knowing this generator will turn on automatically and keep our family safe, warm and we won’t loose any food due to outages.
Date published: 2023-11-08
Rated 5 out of 5 by from Whole House Kyle from Buzyniski did a did a great job. They showed up on time. The installation was neat, and they picked up all the garbage and trash.
Date published: 2023-10-30
Rated 5 out of 5 by from This product has the features we were looking for in a generator. The process of getting an estimate, reviewing options and installation were very smoothly with ACE Electric of Mansfield. The offer of extented warranty made the deal attractive. The work was done well and in an timely manner. We are looking forward to the protection that this generator will offer.
Date published: 2023-10-15
Rated 4 out of 5 by from Clean Installation Recent install by Metro Electric. Thorough job and professional install. Unit has cycled/exercised several times without issue. Waiting for first outage to see how the unit performs. So far, so good.
Date published: 2023-10-07
Rated 5 out of 5 by from excelent product Installation was by local dealer they were timely and informative. After installation went through operation and testing of unit. Powers the whole house. I would recommend this unit.
Date published: 2023-09-30
Rated 4 out of 5 by from Peace of mind. Good and efficient installation. Good communication from Metro Electric through the whole process. From estimate, to scheduling and through installation, the job was handled professionally by Metro Electric. We’ll report back when we get through our first outage with this new equipment.
Date published: 2023-09-20
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18kW-7228 Whole House Switch WiFi-Enabled is rated 4.9 out of 5 by 135.
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