Guardian 18kW Home Backup Generator

Starting At

$5,069.00 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. 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.

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.


Call to Learn More

Call Us at 1-855-899-0055
The best way to find out what generator you need is to request a risk free quote.
Chat Now
Chat With a Customer Service Representative

Request Your Free Quote

*Required Fields

Generac values your feedback!

When writing your review, please consider the following guidelines:

  • Prior to providing a review, refer to a product’s documentation to ensure that unit is being used and maintained properly
  • Alluding to issues incurred in the wake of negligent maintenance or improper use will void review submissions
  • Focus on your experience with the product and its features
  • Provide details about why you liked or disliked a product
  • Reviews submitted for products other than those listed will be rejected immediately
  • Any product reviews referencing independent authorized dealers, service providers, or retailers by name will NOT be posted. (Dealer reviews can be provided here)
  • All submitted reviews are subject to the terms set forth in our Terms of Use

We reserve the right not to post your review if it contains any of the following types of content or violates other guidelines:

  • Obscenities, discriminatory language, or other language not suitable for a public forum
  • Advertisements, “spam” content, or references to other products, offers, or websites
  • Email addresses, URLs, phone numbers, product serial numbers, physical addresses or other forms of contact information
  • Critical or spiteful comments on other reviews posted on the page or their authors

If you wish to share feedback with us about product selection, pricing, ordering, delivery, or other customer service issues, please do not submit this feedback through a product review. Instead, contact us directly.

Enjoy writing your review!

Rated 5 out of 5 by from Great product great price Had generator installed today Holly Electric from Lake City Florida did a awesome job had the power back on in less than 3hrs everything was done professionally and quickly I would highly recommend this company for generator install very happy on my decision this is my 2nd general had one when I lived in northern Wisconsin best decision made great company
Date published: 2021-10-14
Rated 5 out of 5 by from Glad I got it It's only been in for a week, but I sleep better on the stormy nights. Was without power for nearly a week last year and do not want to go through that again. Need CPAP for sleeping so this will maintain that and it will maintain the freezers and refrigerators easily. Also will keep the heat going on the freezing nights. Install was a little rocky but it got done. Gas hook up and electrical were the problem. Everyone was buried in work. Over all I am very pleased
Date published: 2021-10-11
Rated 5 out of 5 by from My husband is on oxygen and this product gives us peace of mind to know should our power fail, we have an excellent backup and no health risk. Our Generac was installed yesterday and the exterior work is impeccable. The installers were very knowledgeable and courteous, they kept us informed every step of the way. The unit blends in beautifully with the landscape.
Date published: 2021-10-02
Rated 5 out of 5 by from Product has great features My generator was up and running yesterday. I feel so safe knowing that my power will not go off. I work from home and the need for having my computer, internet, and work tools up and running is so important to me. The employees were great throughout the entire process. The company has been so professional even acknowledging a coupon for annual service that I got in the mail. I am so glad that I installed my generator and will recommend them highly to my family and friends.
Date published: 2021-09-16
Rated 5 out of 5 by from Excellent. This generator was installed yesterday. The buying experience was very professional. The unit appears to be in excellent condition. The workers were very knowledgeable and respectful of my property. My neighbors recommended this product after their excellent experience.
Date published: 2021-08-21
Rated 5 out of 5 by from Awesome Got this unit for peace of mind for those power outages and now wont have to worry Fast transfer and noise level good when running. Maintenance easy to be preformed.
Date published: 2021-08-12
Rated 5 out of 5 by from This product is great quality and looks great. We received our Generac in July and used it the first time in the beginning of August. The Gererac Guardian 18kw worked great as expected. It was so nice to have electric when our neighbors were out. It let us run the air conditioner which was a plus. It was so nice to have it automatically turn on and off by itself. I Love the new Generac and so does my husband. I would highly recommend it to anyone. Thank you Generac!!
Date published: 2021-08-09
Rated 5 out of 5 by from A Very Good Value and Investment We have had our generator for a month and only had to use it once for five minutes during a brief lightning storm. It performed as expected. The engine noise is somewhat louder than I expected but is not an annoyance. Having this generator has given us much needed peace of mind. An investment that is truly worth the money and value.
Date published: 2021-08-04
  • y_2021, m_10, d_16, h_19
  • bvseo_bulk, prod_bvrr, vn_bulk_3.0.19
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_13
  • loc_, sid_18kw-2019, prod, sort_[SortEntry(order=FEATURED, direction=DESCENDING), SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_generac
  • bvseo_sdk, net_sdk,
  • CLOUD, getReviews, 0ms
18kw-7228 whole house switch is rated 4.9 out of 5 by 13.
  • y_2021, m_10, d_16, h_19
  • bvseo_bulk, prod_bvrr, vn_bulk_3.0.19
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_13
  • loc_, sid_18kw-2019, prod, sort_[SortEntry(order=FEATURED, direction=DESCENDING), SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_generac
  • bvseo_sdk, net_sdk,
  • CLOUD, getAggregateRating, 32ms