Guardian 18kW Home Backup Generator

Starting At

$5,859.00 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.


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 Very happy with the purchase Excellent product, professionally installed by Metro Electric of Michigan
Date published: 2024-04-13
Rated 5 out of 5 by from Great Product,Great Service We had our generator installed today by Young Guns Electric and were extremely impressed with the professionalism and knowledge they provided. Our unit came in sooner than expected, the installation was flawless and the provider was very personable, We would recommend Generac to anyone looking for excellent service.
Date published: 2024-04-09
Rated 5 out of 5 by from Peace of mind, thank you Power outages that last days and sometimes weeks are a regular occurrence during storms in my area. I live alone, and dealing with the most recent outage, convinced me I was getting too old to carry on without the help of an automatic generator. I am pleased with the product & the entire process, site visit, installation, etc. went very smoothly. Having a whole house Generac is a terrific relief, & gives me great peace of mind going forward.
Date published: 2024-03-30
Rated 5 out of 5 by from Great Installation by Lee Legler Our Generac dealer and install crew was Lee Legler Construction & Electric, Yorkville, IL. Lee, Terry, Mia and Lee's installation crew were a pleasure to do business with. Lee's crew were very easy to deal with and was very professional, very detailed and thorough. From what I have been told is Lee and his crew install one Generac every day of the week. They were on time and immediately got to work with our installation. Very patiently explained how the transfer switch worked and cleaned up everything when done. I can absolutely recommend this business for your purchase and installation.
Date published: 2024-03-21
Rated 4 out of 5 by from One small drawback Just had the Generac model 7226, 18 kW home standby generator installed and am very pleased with it. The one small drawback is the Status LED indicator light is on the right side of the unit, away from my street view. The unit should be designed to move the Status LED indicator light to the left side of the unit if needed to view it from the street.
Date published: 2024-02-27
Rated 5 out of 5 by from Bob De The Generator Guys are the best! Very professional in every way. Clean neat workers and knows the Generac product very well. HIGHLY recommended! Explains the whole system after installation!
Date published: 2024-02-22
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
  • y_2024, m_4, d_24, h_7
  • bvseo_bulk, prod_bvrr, vn_bulk_3.0.42
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_148
  • 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, 5ms
18kW-7228 Whole House Switch WiFi-Enabled is rated 4.8 out of 5 by 148.
  • y_2024, m_4, d_24, h_7
  • bvseo_bulk, prod_bvrr, vn_bulk_3.0.42
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_148
  • 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, 15ms