Guardian 11kW

Guardian 11kW

Model #6439

Starting At

$2,509.00 MSRP Transfer Switch and Installation Not Included Add to My Products

Guardian 11 kW Generator Features and Benefits

Provides essential circuit power protection for your home, ensuring the necessities remain powered during an outage. Has the ability to backup a 3-ton air conditioner, well pump or water heater, and the main rooms of your house.

Guardian 11 kW Generator <strong>Features and Benefits</strong>

Generac OHVI® Engine
Your Guardian Series generator might have to get you through days—or weeks—without utility power. Generac’s OHVI® engine, specifically designed for generator use, provides the reliability to power through the most severe outages.

True Power™ Technology
Best-in-class power quality with less than 5% total harmonic distortion means clean, smooth operation of your sensitive electronics and appliances.

Evolution™ Controller
The next generation of intuitive controllers featuring a multilingual, two-line LCD text display with color-coded, backlit buttons.

Certified for 18" Installation to the Home
Third-party certified to NFPA standards to be installed as close as 18” from the home’s exterior wall, provided it is located away from doors, windows, and fresh-air intakes, and unless otherwise directed by local codes.

Easy Installation
When combined with a pre-wired transfer switch or Smart Switch, re-engineered connection points, and composite mounting pad that eliminates the need for a poured concrete base (unless specified by local codes), the Guardian Series 11 kW generator is easy to install.

Rated for Operation in Areas with Low Natural Gas Pressure
In areas with low natural gas pressure, the Guardian Series 11 kW generator can operate on natural gas pressures of only 3.5” of water column.


All-Weather Steel Enclosure
Our durable powder-coat finish helps make the sturdy, Galvanneal steel enclosure perfect for all weather confitions. It’s also able to withstand 150 mph winds. Optional aluminum available, recommended for salt-air locations.

Tool-less Fuel Conversion
Switch between natural gas and LP fuel in the field in a few seconds, without the need for any tools.

Quick, Quiet Exercise Test
Standby generators require a short run-time periodically, known as exercise, to test and ensure the system is functioning properly and ready for an emergency. The Guardian 11 kW self-test runs for only twelve minutes. Choose your schedule - weekly, bi-weekly or monthly.

Mobile Link™ Compatible
Take advantage of Generac’s Mobile Link cellular remote monitoring system and check on your generator’s status using your computer, tablet or smartphone, even when you are away. Sold separately.

Non-cellular remote monitoring options are also available for generator monitoring from inside the home.

24/7/365 Customer Support
Power outages don’t always occur during normal working hours. That’s why Generac’s customer care call center—right here in Wisconsin—provides support any time of day or night, all year long. Generac is standing by 24/7, every minute of every day, to answer your questions.

5-year Limited Warranty

Home Generator Buyer's Guide

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Enjoy writing your review!

Rated 5 out of 5 by Quality peace of mind! After much research we invested in a Generac for our peace of mind. The 1st time it kicked on for an outage, we ran around turning everything on to "test" the unit, you will too, it performed flawlessly. You never have to think about it, but it feels good to know it's there.. READY to run my whole house. May 23, 2016
Rated 5 out of 5 by Installed and Ready Earlier in the year, my wife and I decided on having a backup generator installed. We opted for a unit that provided the basic backup features in case of a power outage. Since moving here just over a year ago, we have already experienced four outages and with a blind elderly mother living with us, that makes life difficult. After some research, we decided on the size and made the call. Our selected dealer / installer responded immediately and after their survey, we completed our selection and set up the installation date. We now have a brand new generator installed and doing its weekly test run. So far, since the installation, we have had no outages but there have been plenty of opportunities owing to the spring storms in our area. We are extremely pleased with the installation, the installer and the services they provide. If we never need the generator, that is fine by me but I know it is sitting there ready to go if we do. May 7, 2016
Rated 5 out of 5 by Working flawlessly I Have had it for over a year now and it just sits there quietly until it's called upon when the power goes out. Then it turns Into a power pumping monster without hesitation. High winds a few weeks back blew a tree over the powerlines and the they snapped. Within 20 seconds my Generac was up and humming. Easily powering my home. And, it kept on running for the next 6 hours with out any issues. Once the power company had made the repairs and juiced up the lines again the generator quietly and automatically went back into hibernation until next time. And there will be a next time. But I'm not worried. One of the best investments for my family and my home. I'm glad I purchased it. April 8, 2016
Rated 5 out of 5 by Cottage Generator We've had this generator for just over a year. It's very reliable especially when paired with Mobile Link which sends a text when it's testing or when power is out at our cottage. Also, it's easy to find firms who will perform the annual maintenance service. Wouldn't hesitate to recommend. April 6, 2016
Rated 5 out of 5 by Whole house back up gives us peace of mind We just had our generator installed. Jay and Charlie were very professional and had it installed in about 6 or 7 hours. Has a nice appearance to it and doesn't take up much room. Kicks right on when the power goes out. All lights and heat went right back on within about a minute. Very glad we invested in one - it's worth the peace of mind. March 28, 2016
Rated 5 out of 5 by Love this product This is a wonderful system. My 90 yr old mother lives with me and the main reason for getting the generator. I now have total peace of mind that we will have power and she will be safe. Couldn't wait for a storm to come and have the power go off. March 23, 2016
Rated 5 out of 5 by Excellent product and installation This generator is works well and as promised. Fits nicely into its surroundings. The installation was as promised and the quality of work was excellent. March 15, 2016
Rated 5 out of 5 by This unit far exceeds expectations I was given a time of 9am to 11am for arrival. They were backing in my driveway at 0900 on the dot. Jay and Charlie were amazing. Constantly working and very friendly. They answered all my questions!!!! Wish more service people would follow suit. March 9, 2016
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Rated 4.9 out of 5 by 130 reviewers.
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The Generac Promise


Peace of mind.

And the power to live.

The Generac Promise means that our 8 – 22 kilowatt Guardian® Series home backup generators will give you peace of mind and the power to live. It means that we engineer and build them here in America*. It means we stand behind them with a strong 5-year limited warranty. We promise to continue to innovate, like with our new Mobile Link™ cellular monitoring system, so you’ll know the status of your generator, no matter where you are. And if you ever need to call, we’re standing by 24/7, every minute of every day, ready to pick up the phone right here in Wisconsin.

*Built in the USA using domestic and foreign parts.

We’ll back you up. We’re standing by. Count on it.

Generac Stock Ticker

  • NYQ
  • GNRC
  • $34.62
  • 6/24/2016 4:04 PM EST