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Generac Guardian™ 8kW Home Standby Generator

Generac Guardian Electric Generators and Accessories
Model: 5882
(Based on expert analysis, manufacturer ratings and customer reviews)
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5
8 Reviews
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  • Features
  • Specs
  • 9
  • 8
  • Articles
  • Accessories
Run Watts
Rated Watts
120/240 Single-Phase
Fully Automatic Operation When Paired With Nexus 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

Nexus™ Digital Controller Monitors & Controls All Functions
Provides system status - compatible with Nexus™ wireless monitors

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 62dB(A)
1' flexible fuel line and DVD manual included

Built-in Battery Charger (Battery Sold Separately)

Automatic Transfer Switch - ATS (Sold Separately)
Customize your system based on your actual application
Select the ideal ATS & DLM™ modules for load shed capabilities

Listed to UL2200 Engine/Generator Standard for Safety
Engine Brand
Generac OHVI
410 CC
Consumer Engine Warranty
3 Years
Commercial Engine Warranty
3 Years
Engine RPM
3600 RPM
Low Oil Alert/Shutdown
Product Specs
120/240 Single-Phase
60 Hertz
Surge Watts
8000 Watts
Rated Watts
8000 Watts
Fuel Type
LP/Natural Gas
NG Power Capacity
7000 Watts
LP Power Capacity
8000 Watts
NG Fuel Consumption @ 50% Load
77 (BTU: 77,000 BTU/HR) ft³/hr
LP Fuel Consumption @ 50% Load
0.94 (BTU: 85,305 BTU/HR) gallons/hr
Rated Amps
33 @ 240 Volts (Single Phase) Amps
Decibel Rating @ 7m
62 dbA
Transfer Switch
Automatic (Not Included)
Not Included (350 CCA)
Cooling System
Air Cooled
UL Listed
Grade Type
Made in USA
340 Pounds
Product Style
Standby Generator
Product Length
48 Inches
Product Width
25 Inches
Product Height
29 Inches
Consumer Warranty
3 Years
Commercial Warranty
3 Years
  9 Questions
Q: Can I use 10W -30 Mobil One synthetic oil in a 8 kw Generac Guardian Home Standby Generator?
by Greg from New York on December 03, 2013

A: The recommended Synthetic oil weight for the Generac Guardian Home Standby Generators is 5W-30 Synthetic. You cannot use 10W-30 Synthetic.

by Mike, Product Expert

Q: Looking to install the 8KW gen-set using the RTSX100A3 ats. Can not find anything that has a simple wiring diagram for necessary control wiring. Also the info does not say anything about what's included with gen-set. Is there a flex line for the fuel connection, disconnect switch for the unit, electrical whip connection, etc.??
by Jim Schultz from Indiana on August 09, 2012

A: Includes:
• True Power® Electrical Technology
• Two Line LCD Tri-lingual
Digital Nexus™ Controller
• Electronic Governor
• External Main Circuit Breaker,
System Status & Maintenance
Interval LED Indicators
• Sound Attenuated Enclosure
• Flexible Fuel Line Connector
• Composite Mounting Pad
• Natural Gas or LP Gas Operation
• 3 Year Limited Warranty
• UL 2200 Listed

The above information is found in the manufacturers spec sheet. The unit alone does not come with any wiring or connection boxes.

The switch installation manual is available on the switch page under the specs link and listed as installation drawing.

by Mike, Product Expert

Q: Can you suggest a generator package that will work with the Model 5449 Panel? Looking for something around 8-12kW. Thanks!
by Andres from Massachusetts on June 03, 2012

A: Any of the individual Generac home standby generators will work with model 5449 transfer are links to the 8kW, 10kW and the 14kW models available.

Generac Guardian Model 5882 - 8kW

Generac Guardian Model 5883 - 10kW

Generac Guardian Model 5884 - 14kW

by Mike, Product Expert

Q: Jim,
I already have a Pro Tran 31410 B, 10 circuit Transfer switch box hooked up to my home. Will the Generac Guardian Series 5882 - 8kW generator hook up to this Pro Tran switch box ?

by Scott from New Jersey on January 26, 2012

A: Absolutely not, no home standby systems we carry are designed to work with manual transfer switches. They are all proprietary and must be connected to their respective automatic transfer switch.

by Mike, Product Expert

Q: Jim I have a 100 amp Pre-Nexus service rated transfer switch. Can I use this with a nexus generator? Ive heard there is some special wiring for the battery charger to work
by Mike Noonan from Michigan on April 18, 2011

A: 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: 0H93030SRV.

by Mike, Product Expert

Q: Jim--

What is the difference between a "Generac" and a "Generac Guardian"?

by Hal from California on March 24, 2011

A: Generac Guardian is a name for a series of products, mainly their Home Standby generators that are for residential use.

They are both made by Generac, Guardian is just a sub brand for Generac. The features for a Generac Guardian series are:

*Automatic, hands-free backup power supply for home or business.
* Kicks in within ten seconds of determining power loss. Your life won’t miss a beat.
* Powered by Generac’s OHVI® engine - designed specifically for generators. Lasts three to four times longer than many competitive engines.
* Easiest installation and best value on the market - many models pre-packaged with a pre-wired transfer switch. All models include mounting pad.
* TruePower™ Technology provides clean, smooth operation of sensitive electronics and appliances.
* Quiet-Test™ mode for a weekly self test that’s quieter than other brands.
* The most environmentally friendly generator on the market - consumes less fuel and releases fewer emissions.

by Mike, Product Expert

Q: How far does a generator has to be from my house?
by Jim from Massachusetts on February 04, 2011

A: The manufacturer recommends the back side of the unit to be set no less then 18 inches from any non-combustible surface and the sides of the unit need at least 36 inches for proper intake and exhaust.

Note: It is recommended to check with your city, county and state codes as they may differ from the manufacturers recommendations.

by Mike, Product Expert

Q: What kind of oil comes in the generator, and when it is time to change it? Can I run Mobile 1 Synthetic 5W30 year round in central Oklahoma?
by Ron Hopper from Oklahoma on January 24, 2011

A: The Generac standby generators are shipped with 5W30 oil in them and Generac does give the option to use 5W30 Synthetic in needed. The owner's manual covers all oil options and temperature ranges. Oil changes are determined by use and maintenance is also covered in the manual.

Owners Manual

by Mike, Product Expert

Q: Can this generator be anchored to the slab? If so, can you provide an anchor bolt layout
by Gregg Deemer from Texas on January 21, 2011

A: Generac's model 5885, as with all of their standby generators, are anchored to the pallet at all 4 corners with special anchors which can be used to anchor the unit directly to your concrete base using concrete bolts.
by Mike, Product Expert

Generac Guardian 5882 Reviews & Ratings
8 Reviews  Sort by 
Ansonia, CT
Purchased from Electric Generators Direct
Purchased 11/2/12
5 out of 55 out of 55 out of 55 out of 55 out of 5
Natural Gas Generator
Best Thing I Ever Did. No fuse, no Gas to worry about. Tests itself. Quieter than reg Generator. Don't have to find a place to put it or worry about someone taking it.
Was this review helpful?
Purchased from Electric Generators Direct
Purchased 11/13/12
5 out of 55 out of 55 out of 55 out of 55 out of 5
8 Kw Generac Emergency Backup Generator
This is the second 8 KW generator I ordered and installed. Both were to replace older units that failed. Installation was easy. Setup was a snap. Registration was simple. Both units are doing what they should be doing, nothing. They are just waiting in stand-by mode.

I have both set up to do the weekly exercise on Sunday at noon. I check them about once a month. Everything is exactly like it should be. The digital display says the unit is ready to run in standby mode.

I would highly... more
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5 out of 55 out of 55 out of 55 out of 55 out of 5
Absolutely Fabulous
I purchased a standby generator from Electric Generators Direct. They are absolutely fabulous. The generator arrived in two days in perfect condition.

Any problems that I had with the installation were quickly answered by the knowledgeable Direct personal. I was delighted with with my whole experience.

I was so happy with this experience, that I will use Power Equipment Direct to by a new tractor in the spring.
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Tom L.
Knox, IN
Purchased from Electric Generators Direct
Purchased 7/24/12
5 out of 55 out of 55 out of 55 out of 55 out of 5
Keep Up The Good Work
After numerous power outages in northern Indiana in July 2012, I decided it was time for a different gen set. I had previously used a Generac 7550 EXL manual gen set. I drove to EGD's warehouse in Bolingbrook IL. The sales staff was extremely helpful. I drove around to your huge warehouse, and the warehouse guys had it already sitting there ready to be loaded in my truck. Drove home (about 90 miles), and had some help in unloading it, set it on a pea gravel pad that I had built for it. Wired it... more
Mike, the Generator Expert
Product Expert
These generators are designed to be used with an automatic transfer switch. Please not that using a manual transfer switch may void the warranty.
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Purchased from Electric Generators Direct
Purchased 6/6/12
5 out of 55 out of 55 out of 55 out of 55 out of 5
Purchase Of Generac Guardian 5882 Generator
I am very pleased with my purchase, from how easy it was to place the order, how quickly the order was shipped and the great delivery service ... and there was no additional charge for the shipping! The installation instructions were very clear. I had no problems installing it and it works great! I am very pleased.
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Millinocket, ME
5 out of 55 out of 55 out of 55 out of 55 out of 5
Owner Of Contracting Business
I have installed numerous older Generac's and only one of these newer models. Very easy install and the newer models are easier to service. I love them.
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Avon, OH
5 out of 55 out of 55 out of 55 out of 55 out of 5
Generac Load Center
I have installed 2 of these units in the past year for customers. They are excellent products. The directions are very clear, making installation simple. I would recommend Generac products to anyone interested. My only regret is that one time I ordered the generator that did not include the transfer switch. This caused me to have to order the switch separately which raised the price by $250 for materials and shipping. The complete package of generator and switch is the best buy. My... more
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Glyndon, MN
Purchased from Electric Generators Direct
Purchased 3/20/12
Total Reviews
2 Reviews
5 out of 55 out of 55 out of 55 out of 55 out of 5
Name-brand Generator
I was looking for a really well built Generator. I checked Onan and Cat but they were too big for what I needed. I kept seeing Generac and have wired some up for customers that ordered them but I was not impressed. Generac kept coming up as the best choice for my customers needs so I finally ordered one. I studied this unit and have found them to be second to no one. The company building these is doing it right. Someone said it was noisey, it's a running engine and I thought it was very quiet.... more
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Shop for the Generac Guardian™ 8kW Home Standby Generator at Electric Generators Direct. Research Generac Guardian 696471058826 standby generators air-cooled generator online. Find Generac Guardian 5882 standby generators air-cooled generator & Guardian 8KW liquid propane and natural gas generator features and specifications.