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The Generac Guardian™ 14kw home standby generator is available for purchase today.

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Generac Guardian™ 14kW Home Standby Generator

(Based on expert analysis, manufacturer ratings and customer reviews)
4.2 out of 54.2 out of 54.2 out of 54.2 out of 54.2 out of 5
5 Reviews
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  • Features
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Air Cooled Standby Generators
14 kW
Rated Watts
Need Help? Ask Our Generator Experts.

Fully Automatic Operation When Paired With Genearc Smart Switch™

Generac OHVI Air-Cooled Engine
Features plateau honed cylinder walls and plasma-moly rings
Full pressure lubrication system w/ 2 year oil change interval
Aids in cooling the engine for longer life

Operates On Clean Burning, Efficient Natural Gas or LP (Vapor)

Skewed Rotor Design For Smooth Output Waveform "Clean Power"
Automatic voltage regulator equipped for +/- 1% regulation

Evolution™ Digital Controller Monitors & Controls All Functions
Provides system status for wireless monitors & Mobile Link™

Sound Attenuated Weather Proof Enclosure
Attractive styling with lockable access doors
Incorporates electrostatically applied epoxy paint technology
Sound dampening enclosure limits sound pressure to a low 66dB(A)
12" flexible fuel line and manual included

Built-in Battery Charger (Battery Sold Separately)

Automatic Transfer Switch - ATS (Sold Separately)
Select the ideal ATS & PMM™ modules for load shed capabilities

Automatic Operation Only

5-Year Limited Warranty & 24/7/365 Customer Care

  Model Number:6247
 Manufacturer:Generac Guardian
 Made in USA:Yes
 Brand:Generac OHVI
 HP/CC:992 cc
 Consumer Engine Warranty:5 Years
 Commercial Engine Warranty:5 Years
 Engine RPM:3600 RPM
 Low Oil Alert/Shutdown:Yes
Product Specs
 Voltage120/240 Single-Phase
 Frequency:60 Hertz
 Cooling SystemAir Cooled
 Fuel TypeLP/Natural Gas
 NG Power Capacity14,000 Watts
 LP Power Capacity14,000 Watts
 NG Consumption (50% Load)177 ft³/hr (BTU: 177,000 BTU/HR)
 NG Consumption (100% Load)279 ft³/hr (BTU: 279,000 BTU/HR)
 LP Consumption (50% Load)1.85 gallons/hr (BTU: 167,888 BTU/HR)
 LP Consumption (100% Load)3.07 gallons/hr (BTU: 278,603 BTU/HR)
 Rated Amps:58 Amps @ 240 Volts (Single Phase)
 Decibel Rating @ 7m:66 db(A)
 A/C Ton Rating3-Tons
 Mounting PadComposite (Included)
 Transfer Switch:Automatic (Not Included)
 Battery:Not Included (525 CCA - Battery Group 26R)
 UL ListedYes
 Weight:439 Lbs. (199.13 kilograms)
 Dimensions:48"L x 25"W x 29"H
(121.92 x 63.50 x 73.66 cm)
 Consumer Warranty:5 Years
 Commercial Warranty:5 Years

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  9 Questions
Q: Are there recommended installation distances from other items? I have an AC unit near where I would like to place the generator. Also, would it be okay to be under a porch? There is about 5' from the ground to the bottom of the porch.
by Matt from Pennsylvania on June 18, 2014

A: The minimum distances can be found in the installation guide we have available on the site on the product page under the specs tab in the download document section.....

Installation Guide

The unit needs at least 3 feet clearance on the sides of the unit for proper air flow and 3 feet from the front for proper maintenance. Also, the unit requires a minimum of 5 feet clearance from the top of the unit. These units cannot be installed under a porch. These units also require a minimum of 5 feet from any window, door or ventilation opening.

We recommend you consult with your local inspector or AHJ (Authority Having Jurisdiction) for your local code requirements as they can sometimes supersede the manufacturers recommendations.

by Jim, Product Expert
Q: What size natural gas line does does the model 6241 require?
by Ken Schaffer from New Jersey on February 18, 2014

A: The 14kW unit has the following fuel requirements for natural gas....

Pressure 5 - 7 Inches of Water Column

1/2 Inch = N/A
3/4 Inch = Max 10 Feet
1 Inch = Max 50 Feet
1-1/4 In = Max 245 Feet

Pressure 3.5 - 5 Inches of Water Column

1/2 Inch = N/A
3/4 Inch = N/A
1 Inch = Max 20 Feet
1-1/4 In = Max 80 Feet
1-1/2 In = Max 175 Feet

***Add 2.5 Feet per any bend, tee or angle in the pipe to the overall distance.

***Gas pipe sizing is one of the most commonly made mistakes. A properly sized gas pipe is critical to the proper operation of the generator. The generator inlet size has no bearing on the proper gas pipe size.

by Jim, Product Expert
Q: If I purchase the Generac 14KW model 6247 and the Genready Load center 5449, Will I need to purchase any additional items for hook up? Will the battery charger connect to the 5449 center?
by Sam Stowasser from West Virginia on January 31, 2014

A: No additional items will be required from Generac, however, to properly connect the transfer switch to the generators battery charger within the generator controller your installing electrician will need to provide a 120V wire from the switch to the controllers T1 connection. This provides the required 120V to the controllers battery charger so it will operate properly.

Please consult with either a "certified" electrician or local Generac installer for installation assistance as they will be familiar with your local electrical code requirements.

by Jim, Product Expert
Q: model 6241 Generac Guardian™ 14kW Standby Generator System 200A Service Disconnect + AC Shedding comes with autotransfer switch. Customer prefers manual switch. Can be done? Price reduction?

How does this compare to model 6247? Whats diference?

Thank you

by Carol Battsti from New York on January 25, 2014

A: These systems are automatic operation only and any use as a manual system will void the warranty and you will have issues with the internal generator controller as it must be connected to an automatic transfer switch.

Model 6247 is the same generator except it does not include the automatic transfer switch. They offer this due to the multitude of applications which may require a specific switch not offered in a package.

by Jim, Product Expert
Q: I have a 5 year old 13kW Generac unit that was hit by lightening. I would like to buy a new 14kW Generac generator. Will the 14kW hook up to my existing 100 amp auto transfer switch? The transfer switch was not damaged in the lightning hit. Will it hook up directly to the box on the side of the house? it is a 10 circuit switch.

by A. Cory from New York on December 21, 2013

A: When trying to connect a newer unit to an existing older transfer switch there are some special requirements which a local certified Generac technician must perform.

There is a required kit that needs to be installed within the existing switch which will provide the proper 120V to the new generators internal controller allowing it to operate and charge the generators 12VDC starting battery.

You can find a local Generac service technician by clicking on the following link.....

Generac Dealer Locator

by Jim, Product Expert
Q: Jim I have a 100 amp Pre-Nexus service rated transfer switch. Can I use this with a nexus generator? I've heard there is some special wiring for the battery charger to work
by J. Depp from California on November 04, 2013

A: Thank you for your interest in Electric Generators Direct!

There is a special kit that needs to be added to the switch to accept the 120V connection which provides the power to the internal generator controller for the charger. These kits are available from your local Generac dealer - Part Number: 0H92540SRV.

by Jim, Product Expert
Q: I have a new 2013 Generac generator and I'm wondering what oil it came with? I would like to top it off properly after the installation.

by John from New Jersey on October 18, 2013

A: The Generac 2013 automatic standby generators are shipped with a SAE 30 non-synthetic oil. If you are located in an area that receives snow, it is recommended to perform an oil and filter change to switch to a synthetic 5W-30 oil to promote proper generator operation. The cold weather kit is also recommended.

The appropriate intervals for oil changes and other maintenance items will be located in the owner’s manual in the Maintenance Schedule.

Current production models do not require any break in, so if the Maintenance Schedule in the owner's manual indicates that oil changes only need to be done every 2 years or 200 hours, you could drain the existing oil and switch to synthetic 5W-30 right away.

by Jim, Product Expert
Q: I have another question about the genrac 14kw generator. my propane tank will be about 150 feet away. what size propane line do i need?
by Clint Yates from Arkansas on September 23, 2013

A: The 14kW unit has the following fuel requirements for propane....

1/2 Inch = N/A
3/4 Inch = Max 45 Feet
1 Inch = Max 170 Feet
1-1/4 In = Max 690 Feet

***Add 2.5 Feet per any bend, tee or angle in the pipe to the overall distance.

***Gas pipe sizing is one of the most commonly made mistakes. A properly sized gas pipe is critical to the proper operation of the generator. The generator inlet size has no bearing on the proper gas pipe size.

by Jim, Product Expert
Q: What is the recommended time frame to change the break-in oil on my Generac 20kW generator?

by Karin Green from New Jersey on August 10, 2013

A: All of the new 2013 Generac Home Standby generators have been pre-run at the factory for 25 hours. So, no break-in period is required.

by Jim, Product Expert
Generac Guardian 6247 Reviews & Ratings
Write Review
Overall Rating
4.2 out of 54.2 out of 54.2 out of 54.2 out of 54.2 out of 5
Price (4)
Durable (3)
Reliable (3)
Easy To Use (2)
Quiet (2)
Unreliable (1)
Difficult To Use (1)
Very Loud My Meter Shows... (1)
The Difficulty Is The Lg... (1)
60% of respondents would recommend this product to a friend
5 Reviews  Sort by 
Tim R.
Westerly, RI
Purchased from Electric Generators Direct
Purchased 10/24/13
Total Reviews
2 Reviews
Total Helpful Votes
12 Helpful Votes
Most Helpful Positive Review
5 out of 55 out of 55 out of 55 out of 55 out of 5
Customer Generators
This is the 4th generator I have purchased from website that I am very happy with. Only complaint is on Generac's new NG to LP Control, I and other people are having extreme difficulties trying to turn these knobs from NG to LP, plastic knob is breaking right off while trying to set control.
Pros: Easy To Use, Quiet, Price, Reliable
Cons: Difficult To Use, The Difficulty Is The Lgng Control Valve Poor New Design
Tim Recommends This Generac Guardian Product
Was this review helpful?
Bernardo P.
Clark, NJ
Purchased from Electric Generators Direct
Purchased 8/23/13
Total Reviews
3 Reviews
Total Helpful Votes
14 Helpful Votes
Most Helpful Critical Review
3 out of 53 out of 53 out of 53 out of 53 out of 5
14kw Generator
Purchased the 14KW with a 150 AMP ATS. Generator delivered in a timely manner and in good condition. Installation straightforward and started up fine. Generator frequently stalls on tests with error code 1501.
Pros: Durable, Features, Easy To Use, Price
Cons: Unreliable
Bernardo Does Not Recommend This Product
Jim, the Generator Expert
Product Expert
For any problems related to error codes on the generator, you would have to contact a Generac directly @ (888) 436-3722 x5381. They will most likely refer you to a servicing dealer.
Was this review helpful?
Marcus P.
Redmond, WA
Purchased from Electric Generators Direct
Purchased 11/21/13
4 out of 54 out of 54 out of 54 out of 54 out of 5
Generac Guardian™ 14kw Home Standby Generator Review
Pros: Price
Cons: Very Loud My Meter Shows Almost 100db
Marcus Does Not Recommend This Product
Was this review helpful?
Marie Z.
Attleboro, MA
5 out of 55 out of 55 out of 55 out of 55 out of 5
Love It!
I bought mine over a year ago and have had no problems after an initial bad panel. I was quoted a price locally that was $3000+ higher than what I spent buying it here! I contacted a local plumber and asked if he could install it for me, and find an electrician. He did. I had the generator delivered to his shop, and he took care of the rest. The electrician was beside himself trying to install it. He said it was much more work than advertised.

However, I finally called Generac and... more
Pros: Price, Durable, Quiet, Reliable
Marie Recommends This Generac Guardian Product
Marie Would Recommend Electric Generators Direct To A Friend
Web Site


"Electric Generators Direct has been great. I've had a great experience with them. I have recommended them to others, and continue to do so."
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Oviedo, FL
Purchased from Electric Generators Direct
Purchased 5/1/14
4 out of 54 out of 54 out of 54 out of 54 out of 5
Buy It
This replaces a 10 year old Briggs and Stratton generator that blew a rod. This product was recommended by my generator repairman, who also installed it without any issues and now no power, no sweat.
Pros: Reliable, Durable, Fast, I'd Buy It Again
Rick Recommends This Generac Guardian Product
Rick's Experience With Electric Generators Direct
Web Site


"PED exceeded all my expectations"
Was this review helpful?
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Shop for the Generac Guardian™ 14kW Home Standby Generator at Electric Generators Direct. Research Generac Guardian 696471062472 standby air-cooled generators online. Find Generac Guardian 6247 standby air-cooled generators & Generac 14kW Generator features and specifications. Get the best deal; compare Generac Guardian 6247 prices now. Buy the 6247 direct and save.