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 Flawless installation GenTec located in Crete, IL did a thorough, clean and professional install. Starting with Tina in the office and Steve getting a timely quote to Steve Jr. and his partner on the install. Transfer switch mounted in basement , not on outside like other companies suggested and gas line was tapped in the basement as well. No unsightly lines running on the outside. If my 18 kw Generac is as good as GenTec install, I will be an extremely satisfied customer. Thanks to Steve and all his crew.
Date published: 2023-05-18
Rated 5 out of 5 by from Very good experience purchasing and with installation Very impressed with the customer service by salesman and installers. Everything went as promised. Delivered on time as planned. Installers were very easy to work and eager to satisfy our location requirements. The installation was very professional and organized. I was very impressed how clean looking the unit looked at here completion of the project
Date published: 2023-05-11
Rated 5 out of 5 by from Peace of mind We were on the fence about getting one until we lost power 8 times in 1 summer. We have 2 toddlers and it was just really annoying to not have power with little kids. really glad we pulled the trigger on this.
Date published: 2023-05-01
Rated 5 out of 5 by from Only had it a couple of months..... I had this installed two months ago and it already has 5 hours of use on it from a power outages. The peace of mind when storms are rolling through is amazing. Installation was easy, professional job and I'm happy so far!
Date published: 2023-04-28
Rated 5 out of 5 by from Excellent purchase with great features Stuller Solutions is a great company to install and service the generator we purchased. It gives us the peace of mind we were looking for when power goes out. They are very professional and the installation went perfectly. Would highly recommend them to install Generac generators in our area.
Date published: 2023-04-27
Rated 5 out of 5 by from Great features I am so happy to have this generator as we have gone through several hurricanes since moving to FL in 1981. Should have purchased a GENERAC sooner. Our home is now protected from the power failures to come
Date published: 2023-04-24
Rated 5 out of 5 by from Nice Product The team at Storm Guardian Generators out of Alvin, TX did an awesome Job. Got many calls about the installation dates and time. Came early on the date, (was cool with me). Got everything completed in a timely manner. Cleaned everything up when finished. And now we wait for center point, not there fault. I would have to say this is a very reliable company and was very competitive on the estimate and gave me more than what other companies were offering. Thanks!! Very much appreciated! Great job guys and ladies in the office! Thanks Generac for the referral also.
Date published: 2023-04-05
Rated 5 out of 5 by from Great Product amazing customer service The product is sleek looking and works great! Would highly recommend!
Date published: 2023-03-20
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18kW-7228 Whole House Switch WiFi-Enabled is rated 4.8 out of 5 by 111.
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