Generac Guardian 6245
Generac Guardian 6245
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Generac Guardian™ 8kW Home Standby Generator
Generac Guardian™ 8kW Home Standby Generator
Model: 6245
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Product Q&A
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Recommended Accessories

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Expert Recommended Accessories Selected by Jared, our Expert
Required Accessories 9
These accessories are required to properly setup/install this product.
Optional Accessories 10





Standby (Air Cooled)

Run Watts

8,000 Rated Watts


120/240 Single-Phase


LP/Natural Gas


Generac OHVI

  • 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 62dB(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 & Listed to UL2200 Standards For Safety
  • 5-Year Limited Warranty & 24/7/365 Customer Care


specs product image PID-10668
Product Specs
120/240 Single-Phase
60 Hertz
Rated Watts
8000 Watts
Surge Watts
8000 Watts
Fuel Type
LP/Natural Gas
NG Power Capacity
7000 Watts
LP Power Capacity
8000 Watts
NG Fuel Consumption @ 50% Load
77 ft³/hr
NG Fuel Consumption @ 100% Load
121 ft³/hr
LP Fuel Consumption @ 50% Load
0.94 gallons/hr
LP Fuel Consumption @ 100% Load
1.42 gallons/hr
Rated Amps
33 Amps
Decibel Rating @ 7m Learn More
62 dbA
Transfer Switch
Automatic (Not Included)
Not Included (525 CCA)
Cooling System
Air Cooled
UL Listed
Grade Type
Engine Brand
Generac OHVI
410 CC
Consumer Engine Warranty
5 Years
Commercial Engine Warranty
5 Years
Engine RPM
3600 RPM
Low Oil Alert/Shutdown
340 Pounds
Made in USA
Consumer Warranty
5 Years
Commercial Warranty
5 Years
Product Style
Standby Generator
Product Length
48 Inches
Product Width
25 Inches
Product Height
29 Inches


Generac Guardian 6245 Reviews & Ratings

Product Q&A

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Product Questions Answered by Jared, the Generator Expert
How do you properly size a generator for a 1500 sq. ft. to 2000 sq. ft. home?
Kenneth F. 
from Arkansas 
December 13, 2016
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I'm interested in the Generac 14 kw standby generator and I want to power it with natural gas. All your other Generac standby generators show a wattage loss of about 2kW when powered with natural gas, but this one does not show a loss in the specs I have reviewed. Is this a misprint in the specs or is this a true output? If I power it with natural gas will it deliver 12 kW or 14 kW?
Albert Leblanc 
from Michigan 
May 06, 2014
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
J. Depp 
from California 
November 04, 2013
Hi, I am considering a purchase of 8Kw Generac. What does it mean by off-the-grid environment? How will I know if my house is also off-the-grid ? Thanks. Pramod
Pramod G. 
from New Jersey 
October 15, 2013
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Can the Nexus 200 amp Smart Switch be installed with a smaller (8KW) generator? We may be limited to the smaller generator due to propane supply issues, but love the load shedding concept.
Jim White 
from Connecticut 
May 12, 2013

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