Model # 6244

Internet #204006877

Store SO SKU #1000032989

Generac 20,000-Watt Air Cooled Automatic Standby Generator with 200-Amp SE Rated Transfer Switch

Discontinued Generac

20,000-Watt Air Cooled Automatic Standby Generator with 200-Amp SE Rated Transfer Switch

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Frequently Bought Together

Product Overview

Choose the #1 Selling Home Standby Generator Brand. Generac’s 20kW Guardian Series provides the automatic backup power you need to protect your home and family during a power outage. Connected to your existing LP or natural gas fuel supply, it kicks in within seconds of determining power loss—automatically—and runs for as long as necessary until utility power returns. Control your power. Control your life.

  • TOOL-LESS FUEL CONVERSION allows for easy switching between natural gas and LP fuels in the field.
  • SYSTEM INCLUDES: 20 kW generator, 200 Amp transfer switch, Evolution controller, and composite mounting pad. Mobile Link and 26R battery purchased separately.
  • 24/7 GENERAC CUSTOMER CARE support 365 days a year. Power outages do not always occur during normal working hours – that is why we are standing by.
  • GENERAC’S OHVI ENGINE is purpose-built to run dependably for extended periods, delivering power when you need it most.
  • GENERAC’S EVOLUTION CONTROLLER features a dual-line, multilingual LCD display allowing for easy monitoring and management of generator functions, built-in hour meter, and external “at-a-glance” indicator lights.
  • CERTIFIED  FOR 18” INSTALLATION TO THE HOME (3rd Party-certified to NFPA standards provided it is located away from doors, windows and fresh air intakes, and unless otherwise directed by local codes.)
  • EASY INSTALLATION with an intelligent pre-wired transfer switch, re-engineered connection points, and composite mounting pad that eliminates the need for a poured concrete base (unless specified by local codes.) Get it installed 800-557-5221
  • RATED FOR OPERATION IN AREAS WITH LOW NATURAL GAS PRESSURE, significantly lower than published numbers for competitive standby systems (Generac is the only manufacturer to certify operation on only 3.5” of water column.)
  • STURDY, STEEL ENCLOSURE WITH RHINOCOAT FINISH for superior protection from the elements and able to withstand 150 mph winds.
  • QUIET-TEST weekly self-test mode runs at a lower rpm, is quieter, and consumes less fuel . Sound-dampening enclosures are lined with foam panels for further noise reduction.
  • DPM TECHNOLOGY intelligently manages household loads for a more affordable standby solution.
  • TRUE POWER TECHNOLOGY provides clean, smooth operation of sensitive electronics and appliances.
  • MOBILE LINK COMPATIBLE - wireless remote monitoring system. Receive status updates using your computer, tablet, or smart phone - giving you peace of mind, even when you’re away (purchased separately).
  • THE GENERAC PROMISE - Engineered and built in the USA supported by a five year limited warranty and 24/7 customer care support 365 days a year.

Info & Guides

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Name 14,000-Watt Air Cooled Standby Generator with 200 Amp Service Entrance Rated Automatic Transfer Switch and Load Shed Kit 20,000-Watt Air Cooled Automatic Standby Generator with 200-Amp SE Rated Transfer Switch 20,000-Watt Air Cooled Standby Generator with 200 Amp Service Entrance Rated Automatic Transfer Switch and Load Shedding Synergy 20,000-Watt Air Cooled Variable Speed Standby Generator with 200 Amp Automatic Transfer Switch
Brand KOHLER Generac KOHLER Generac
Ratings (10) (91) (24) (23)
Commercial / Residential Residential Residential Residential Residential
Engine Make Kohler OEM Branded Kohler OEM Branded
Generator Features Hour Meter,Low Oil Shutdown,Overload Protection Hour Meter,Low Oil Shutdown,Overload Protection Hour Meter,Low Oil Shutdown,Overload Protection Auto Idle Control
Continuous Wattage 14000 20000 20000 20000
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Warranty / Certifications

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Customer Questions & Answers

Getting natural gas and need to determine BTU input rating for various Generac generators ie, 20000 watt

Asked by: Will
Per the unit's spec sheet, when utilizing natural gas, the volume and pressure required for the 20kW unit, model number 6244, is 308,000 BTU/hr (308 ft3/hr) with 3.5-7” of water column.
Answered by: Generac
Date published: 2015-09-20

can i purchase from home depot a 20,000 watt generator with a 100 amp transfer switch

all I can find is 200 amp transfer switches with 20,000 watt gwnwerator
Asked by: northboy
Generac’s 20kw automatic standby generator, model number, comes with a pre-packed 200A automatic transfer switch. If you are looking for alternative options, we would recommend contacting your local Home Depot store directly.
Answered by: Generac
Date published: 2015-09-20

What is the mounting pad requirement for this unit?

Asked by: Eric
Per the installation guidelines provided with the unit, Generac’s 20kw Guardian Series automatic standby generators should be mounted on either a concrete pad, or pea gravel base. To ensure that your unit is appropriately installed, we would recommend working with a local electrician. If you have any other product-related inquiries, please do not hesitate to contact us directly at 888-GENERAC (436-3722).
Answered by: Generac
Date published: 2015-09-20

Is there an operators manual available for the guardian 0057440AVCFI

Asked by: AVCFI
Product-related information and any associated documentation can be requested, by contacting us directly at 888-GENERAC (436-3722), with your product’s model or serial number.
Answered by: Generac
Date published: 2015-09-20
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Customer Reviews

20,000-Watt Air Cooled Automatic Standby Generator with 200-Amp SE Rated Transfer Switch is rated 4.9 out of 5 by 91.
Rated 5 out of 5 by from Good unit easy to install The unit is easy to install and works great. Remember you need to purchase a battery it is not included. For contractors such as myself it adds to the materials cost.
Date published: 2017-02-02
Rated 4 out of 5 by from 10 year parts and labor warranty I never received confirmation of my 10 year parts and labor warranty that was supposed to be provided
Date published: 2017-02-10
Rated 5 out of 5 by from It's ready 24/7 It is handy for myself. But it is for my wife when i''m not around.
Date published: 2017-01-27
Rated 5 out of 5 by from Works as it should The Generac 20kw standby generator is a workhorse. I live in the Sierra Nevada mountains in California and we are having the wettest winter in 20 years. While that is great for the California drought, it has played havoc with utility power. My generator has provided power seamlessly a number of times this winter. It is very quiet. It is also very efficient, uses maybe 2 gallons of propane an hour based on the latest propane tank fill up. My generator is hooked up to a dedicated 250 gallon propane tank so it is easy to regulate the use. Best investment I've made for peace of mind, safety and convenience.
Date published: 2017-01-25
Rated 5 out of 5 by from Sturdy. Dependable. Peace of Mind... I bought the generator because during the winter we've had outages in the area up to three weeks. The generator was installed two years ago, and we've had outages six times. The longest was only five hours, so it hasn't gotten much use so far. But the generator turned on quickly and automatically as soon as the electricity failed. Absolutely amazing! The only thing I would change about it would be to reduce the noise level if possible. Other than that, the unit itself is quite nice looking, very sturdy with sleek lines and glossy paint. I'm so pleased with the purchase, being able to enter winter with a more relaxed attitude knowing I have a generator to save the day(s) when the power grid is down.
Date published: 2017-01-25
Rated 5 out of 5 by from Awesome This is our 2nd whole home generator, we had one at our previous home, and when we bought our current home, it didn't have one. We didn't choose Generac, our contractor did. The first thing I noticed was the appearance, much cleaner, and sleeker than I expected. The second thing I noticed during the test cycles, is how quiet it was, and it is closer to our living space than the old one! We lost power about 4 months after install, it came on perfectly, but then "partial" power was restored, enough to deactivate the generator, but not enough to power everything in the house. Fortunately, it is possible to manually disconnect from the incoming power and run only on the generator in that situation. We are very satisfied with our Generac generator!!!
Date published: 2017-01-25
Rated 4 out of 5 by from Does the job! Bought a 20KVA stand by generator to power my whole house and garage. We live in an area that experiences frequent power outages... and it is also in a snow belt so even with a gas furnace, no power means no heat. Have had the generator for about 9 months and it just - Does the job. It is reasonably quiet, starts up quickly and it protects our house from the risk of cold damage (think frozen pipes) due to extended power outages (I've experienced 8-10hr power outages and locals tell me that they've seen 3+ day power outages). Would love to see a wifi hookup that would give me stats on my generator such as - current power state, hours of operation, alerts for next scheduled maintenance, alerts for any (potential) problems. Otherwise, would buy it again.
Date published: 2017-01-25
Rated 3 out of 5 by from I have installed several of these The generator was just like the other generators that I have installed, this one did have a problem. The control unit on the generator never functioned correctly. It would read that there was a voltage problem and never signal the automatic transfer switch to transfer to generator power when power was lost. When power was restored it would kick the transfer switch back to normal power. The warranty was used to cover the replacement of the control panel and now it is up and running. Other than that one issue, all is good.
Date published: 2017-01-25
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