Generac Guardian Series Generators

Choose the generator seven out of ten families have already installed. Protect your home or business with the preferred 24/7 backup power protection of Generac.

The #1 selling line of home backup generators

With Generac’s Guardian Series, you need never invest in a larger backup power system than you need. From essential circuit coverage to backing up your entire home, there is a Guardian Series home backup generator that fits the bill.

What Makes the Guardian Series So Popular?

Generac’s Guardian Series offers benefits that few competitors can match. Installation flexibility. Sophisticated yet intuitive controls. Quiet operation. All backed by 24/7/365 customer support at our corporate headquarters, and a nationwide dealer network more than 5000 strong.

8kW Home Standby Generator

11kW Home Standby Generator

16kW Home Standby Generator

20kW Home Standby Generator

22kW Home Standby Generator

The 22 kW Guardian® Series home standby generator is the largest air-cooled home standby generator on the market. Not only does it deliver all the features and functionality customers have come to expect from the market-leading brand of home standby generators, but with an MSRP that is the lowest cost per kilowatt of any air-cooled home standby generator. Provides whole house coverage for many homes.

Lowest Cost Per Kilowatt – Homeowners can invest in a home standby air-cooled generator size that used to only be available in much more expensive, liquid-cooled models, giving them the lowest cost per kilowatt available.
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 22 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 22 kW generator can operate on natural gas pressures of only 3.5” of water column.
All-Weather Aluminum Enclosure – Our durable powder-coat finish helps make the sturdy, all-weather aluminum enclosure corrosion resistant, making it ideal for coastal, salt-air climates. It’s also able to withstand 150 mph winds.
Tool-less Fuel Conversion – Switch between natural gas and LP fuel in the field in a few seconds, without the need for any tools.
Quiet-Test™ Mode – All standby generators run a weekly test to ensure the system is running properly. Thanks to Quiet-Test, your Guardian Series home standby generator runs its self-test at a lower, quieter RPM than standard operation, and can be programmed to run 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

25kW Home Standby Generator

30kW Home Standby Generator

45kW Home Standby Generator

60kW Home Standby Generator