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Generac Guardian™ 22kW Aluminum Home Standby Generator

Generac Guardian Electric Generators and Accessories
Model: 7042
(Based on expert analysis, manufacturer ratings and customer reviews)
4.8 out of 54.8 out of 54.8 out of 54.8 out of 54.8 out of 5
4 Reviews
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Run Watts
Rated Watts
Surge Watts
Starting Watts
22kW (LPG) / 19.5kW (NG) Guardian Air-Cooled Standby Generator
Protects your home and family during a power outage

*Automatic Operation Only*
Fully automatic operation when paired with Generac Smart Switch™ (Sold Separately)

5-Year Limited Warranty
Plus 24/7•365 Customer Support so you have you questions answers when its convenient for you

Generac's G-Force Engine
Specifically designed for the demanding environment standby generators endure
Full pressure lubrication system w/ 2 year oil change interval

Operates On Clean Burning, Efficient Natural Gas or LP (Vapor)
Connects to your existing LP or natural gas fuel supply

True Power™ Electrical Technology & Automatic Digital Voltage Regulation (+/- 1%)
Less than 5% Total Harmonic Distortion (THD) for utility grade power
Allows for faster response time & maximum motor starting ability

Evolution™ Digital Controller
Multilingual, 2-Line LCD display for simple, straightforward operation
Programmable-exerciser lets you set how often & what time generator will self-test

Tough, Durable All-Aluminum Sound Attenuated Enclosure
RhinoCoat™ powder-coated finish keeps enclosure protected from the elements

Compatible With Mobile Link™ Remote Monitoring (Sold Separately)
Easily monitor generator status anywhere with a smartphone, tablet, or PC

Installation Flexibility*
Can be installed within 18" of a building; *Always check local building codes

Generac Standby Generators & Engines - Built In The USA*
Built in the USA using domestic & foreign parts

Additional Features:
Base fascia kit, 12" Flexible fuel line and Direct-To-Dirt composite mounting pad
Built-in Battery Charger (Battery Sold Separately)
Engine Brand
Generac OHVI
Starting System
12v Auto Start
999 CC
Consumer Engine Warranty
5 Years
Commercial Engine Warranty
5 Years
Engine RPM
3600 RPM
Low Oil Alert/Shutdown
Product Specs
120/240 Single-Phase
60 Hertz
Surge Watts
22000 Watts
Rated Watts
22000 Watts
Fuel Type
LP/Natural Gas
NG Power Capacity
19500 Watts
LP Power Capacity
22000 Watts
NG Fuel Consumption @ 50% Load
216 (BTU: 216,000 BTU/HR) ft³/hr
NG Fuel Consumption @ 100% Load
310 (BTU: 310,000 BTU/HR) ft³/hr
LP Fuel Consumption @ 50% Load
2.56 (BTU: 232,320 BTU/HR) gallons/hr
LP Fuel Consumption @ 100% Load
3.87 (BTU: 351,203 BTU/HR) gallons/hr
Rated Amps
91.6 @ 240 Volts (Single Phase) Amps
Decibel Rating @ 7m
67 dbA
Transfer Switch
Automatic (Not Included)
Not Included (540 CCA)
A/C Ton Rating
2 x 5-Tons
Mounting Pad
Composite (Included)
Cooling System
Air Cooled
UL Listed
Grade Type
Made in USA
466 Pounds
Product Length
48 Inches
Product Width
25 Inches
Product Height
29 Inches
Consumer Warranty
5 Years
Commercial Warranty
5 Years
Subject: Store ID: Product ID: Data Category: Brand Category:

*Ask Mike about the Generac Guardian 7042. Sorry, no repair questions:




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  7 Questions
Q: I just bought 22k Generac it will be 70' from the propane tank what size flex piping should i buy?
by Dennis K. from Wisconsin on June 30, 2016

A: Below is a link to the Install Manual that will cover the pipe sizing using LP. I recommend checking with a plumber or LP company for installation of the gas line.

Generac Air Cooled Installation Guide
by Mike, Product Expert
Q: Can the air cooled unit operate in warm weather conditions and not overheat. We just had a 122 degree day and if the electricity had failed, would this generator be able to handle the load in the heat?
by Gene H. from California on June 27, 2016

A: Thank you for contacting us.

Generac Air-Cooled Standby Generators are tested in accordance to UL 2200 standards with an operating temperature of -20 ºF (-29 ºC) to 122 ºF for normal operating range

Please let us know if you have any other questions.
by Mike, Product Expert
Q: Should I pour a concrete base to place this unit on or can you place on a level dirt pad?
by Jim from Iowa on September 03, 2015

A: Thank you for contacting Electric Generators Direct.

I would advise pouring a concrete base. Or I would advise looking into a GenPad.

GenPad Product Info

by Mike, Product Expert
Q: Can aluminum wire be used to feed the breaker on a Generac generator?
by Glenn from New Jersey on December 11, 2014

A: Thanks for your inquiry.

When wiring the generator it must be in accordance with local jurisdiction and codes. If ALUMINUM conductors are used, apply corrosion inhibitor to conductors.

by Mike, Product Expert
Q: What is the clearance needed on all four sides of the unit for proper operation?

by Mark C. from Connecticut on July 24, 2014

A: Page 11 of the Installation Guide shows proper installation distances according to NFPA and manufacturers recommendations. The guide is available on our site under the specs tab in the download documentation section......

Installation Guide

by Mike, Product Expert
Q: What type of oil should I use in my Generac home standby generator?
by Jim from Illinois on November 11, 2013

A: The maintenance section in the Generac's home standby owner's manual lists that the oil type is based on temperature ranges specific in your area.....

SAE-30 above 32º F (0º C)
10W-30 between 40º and -10º F (4º and -23º C)
Synthetic 5W-30 for all temperature ranges

All new models come with SAE-30 oil in them and have been test run at the factory for 25 hours and no break-in is required. The first oil change would be at 2 years or 200 hours, whichever comes first.

by Mike, Product Expert
Q: I'm not sure if this falls into the repair area but, I'm concerned about the sound this generator produces. Is there a way to lower that? Is there sound proofing approved for use for the interior walls of this type of home standby? My neighbors bedroom window will be 20ft from where I plan to install the generator. I would prefer doing something inside the generator as apposed to some type of fencing or other external methods.

by Mark H. from New Jersey on October 23, 2013

A: The manufacturers make every effort to reduce the sound of their generators as best they can keeping within NFPA and UL requirements. There are currently no options or parts available to install inside home standby systems to reduce their db(A) levels.

Your only option is location or sound barriers installed around the unit while keeping within NFPA and manufacturers distance requirements for proper fire protection, air intake and exhaust output.

We recommend consulting with your local inspector or AHJ (Authority Having Jurisdiction) as to the specific local code requirements.

by Mike, Product Expert
Generac Guardian 7042 Reviews & Ratings
Overall Rating
4.8 out of 54.8 out of 54.8 out of 54.8 out of 54.8 out of 5
Price (4)
High Quality (3)
I'd Buy It Again (2)
Durable (1)
Fast (1)
Heavy (2)
how to lift properly and... (1)
Durability (1)
100% of respondents would recommend this product to a friend
4 Reviews  Sort by 
W R.
Poolesville, MD
Purchased from Electric Generators Direct
Purchased 5/16/17
Most Helpful Positive Review
5 out of 55 out of 55 out of 55 out of 55 out of 5
Upgraded To A Larger Genset And Haven't Looked Back!
This is my second Generac genset. The first one performed very well but I decided to add more load to it and needed to upgrade to a larger head unit. The first one was a bit harder to hook up but this new one was much easier. They have really made the connections for the control and power supply wires much better. I was able to reuse the transfer switch so I only needed to increase wire size and reconnect to the new gen set. I gave my first genset to my brother to install at his house. I'm... more
Pros: High Quality, Price, Reliable, I'd Buy It Again
W Recommends This Generac Guardian Product
W's Experience With Electric Generators Direct
Web Site


"They made the sale and delivery simple. Paid by the echeck method and awaited my generator. It was shipped when they said it would and it was delivered when they said it would. Delivery person rolled it onto my trailer from his lift gate and he was done. When it goes this smooth you got to know that they have done this a few times and have the kinks worked out."
Was this review helpful?
Richard R.
Commack, NY
Purchased from Electric Generators Direct
Purchased 7/20/17
4 out of 54 out of 54 out of 54 out of 54 out of 5
Generator Wont Start
I'm having issues with a 22kw Generac that I installed. It wont start right out of the box. Electrical problem in the generator.
Pros: Price
Cons: Heavy, Durability
Richard Recommends This Generac Guardian Product
Mike, the Generator Expert
Product Expert
Very sorry you're having issues with your generator. For warranty service, you'll need to contact Generac @ 888-436-3722 to find a servicing dealer in your area.
Was this review helpful?
Jim H.
Frankenmuth, MI
Purchased from Electric Generators Direct
Purchased 3/25/17
5 out of 55 out of 55 out of 55 out of 55 out of 5
Easy To Read Instructions And Set-up
Great unit was packed very well, set up was easy and good instructions, would like to see in instructions on how to properly lift and place the unit, I ended up going on Youtube to watch several videos on how to set unit in place, Other than that it went well, no glitches.
Pros: Features, Price, Fast, High Quality
Cons: how to lift properly and set in place
Jim Recommends This Generac Guardian Product
Jim's Experience With Electric Generators Direct
Web Site


"Overall great experience delivery was very prompt in fact came in 1 day early than expected, was never notified for delivery, lucky I was home to receive. It was packaged very well on pallet and fastened down. Very pleased."
Was this review helpful?
Larry B.
Pellico Plains, TN
Purchased from Electric Generators Direct
Purchased 12/13/16
Total Reviews
2 Reviews
5 out of 55 out of 55 out of 55 out of 55 out of 5
The Company & The Product, The Best In The Market
I really liked the product. The company was very professional.
Pros: Durable, Price, High Quality, I'd Buy It Again
Cons: Heavy
Larry Recommends This Generac Guardian Product
Was this review helpful?
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  • Ships via Semi-Truck
  • Requires a loading dock or forklift
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We currently CANNOT ship this product to Alaska, Hawaii or any destination outside of the United States
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  • Ships Same Business Day
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  • $50 Service Charge
Lift Gate Services
  • Safely Lowers Products Off the Truck
  • Requires Special Hydraulic Lift
  • Free Lift Gate
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Estimated Ship Date on August 31, 2017

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Shop for the Generac Guardian™ 22kW Aluminum Home Standby Generator at Electric Generators Direct. Research Generac Guardian 696471070422 standby air-cooled generator online. Find Generac Guardian 7042 standby air-cooled generator & Guardian 2016 22kW Aluminum features and specifications. Get the best deal; compare Generac Guardian 7042 prices now. Buy the 7042 direct and save.