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Guardian 20kW with Whole House Switch

Guardian 20kW with Whole House Switch

Model #6729

Starting At

$4,549.00 MSRP Includes Transfer Switch - Installation, Taxes and Shipping Not Included Add to My Products

Guardian 20 kW Generator Features and Benefits

One of the most powerful air-cooled generators on the market today, the Guardian Series 20 kW automatic home standby generator can provide whole-house backup power for many homes.

Guardian 20 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 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 20 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 20kW 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 conditions. 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

Home Generator Buyer's Guide

Included with This Generator Bundle

Gain up to whole-house coverage through smart power management. If it is unlikely you will turn on every appliance at the same time (most people don’t), a smaller generator paired with a Generac Smart power management transfer switch provides whole-house coverage through a managed power solution. The process is simple - non-essential circuits are shed when the generator approaches maximum capacity to eliminate overload, then are cycled back on when essential circuits are satisfied. Give yourself a little more than just the basics without a substantial increase in your investment.

Download the Spec Sheet

Generac's Managed
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Rated 5 out of 5 by from Better than 5 stars!!!!! We had our Generac 20kW and whole house switch installed in March 2014. Ever since the install we have been hoping for the power to go out (strange yes but wanting to test the investment). Finally the power went out during a thunderstorm Sept. 1st. The generator started confidently just like it does on it's weekly exercise runs. We were so pleased that we did not need to drag out the old portable generator. During the 6 hours of outage we ran, 3 TVs, 3 computers, the dishwasher, the AC, 2 fridges, 1 freezer, the sump pump, the well pump, the garage door and almost every light in the house at varying times. The Generac never missed a beat and was so quiet when it was time for bed nobody complained like they did with our old portable. Fantastic product. Exactly why my parents and in-laws installed their's a few years ago.
Date published: 2014-09-02
Rated 5 out of 5 by from Just finished 12 days of flawless power after Sandy After last year's hurricane here on Long Island knocked out power for several days leaving our sump pumps useless, we purchased the 20k unit...couldn't have imagined it would be running for 12 days straight less then a year later! Our power does get knocked out pretty regularly, and just last month the unit was running for 5 hours. I recently had the radio remote installed, right by my home alarm keypad. I'd highly recommend it, as it gives you the added peace of mind knowing the unit is ready to go without going outside and opening up the unit. Excellent unit, would highly recommend it.
Date published: 2012-11-11
Rated 5 out of 5 by from Excellent product!!! This product gives me "piece of mind," especially when I'm traveling.
Date published: 2016-11-02
Rated 5 out of 5 by from WOW...still running strong Have had generator for 3 1/2 years...needed it a few times for short durations...NOW Hurricane Matthew....generator has been running for 5 days....house is nice and comfortable.....turn it off everyday for a few hours to give it a 'rest' , check oil etc....no problems keeps on going....
Date published: 2016-10-11
Rated 5 out of 5 by from Fantastic! What peace of mind! Power goes out. Generator comes on within 15 seconds. Entire house has electricity again! No worries. Fairly quiet. Considering what it has to do (power an entire house) it is extremely quiet.
Date published: 2016-06-27
Rated 5 out of 5 by from 15 seconds and this unit is powering the whole house The few times I have been without electricity, this unit performed flawlessly!
Date published: 2016-06-23
Rated 5 out of 5 by from Product is very functional Got my Generac 4 years ago after a storm. I have been extremely happy with it. It is quiet . Lost power 2 times for a couple of hours and my power never skipped a beat. Thank you Generac!
Date published: 2016-06-23
Rated 5 out of 5 by from Not one thing we don't like about it! This is our second generator I wish we would have hot a Generac the first time. I can not find one thing to complain about. Now my father and my sister have gotten one also. We look forward to many worry free years. Great job!
Date published: 2016-06-22
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20kW-6730 is rated 4.9 out of 5 by 275.
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Generac Stock Ticker

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  • 12/9/2016 4:02 PM EST