Kohler KG125R-QS5
Kohler KG125R-QS5
Kohler KG125R-QS5
Kohler KG125R-QS5
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Kohler KG125R-QS5
Kohler KG125R-QS5
Kohler KG125R-QS5

Kohler KG125R-QS5- 125 kW Emergency Standby Power Generator (Aluminum) (120/208V 3-Phase)



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*This product qualifies for Free Shipping anywhere in the contiguous US. Accessories may ship separately. Items over 100lbs shipped via semi-truck, be sure to select "Lift Gate" to lower the product to the ground curbside. Remote area surcharges may apply, see our full shipping policy for more details.
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Shipping Details
  • Free to Lower 48 States
*We currently CANNOT ship this product to Alaska, Hawaii, California or any destination outside of the United States
$525 / Month
With our 82 months 10.99% APR*
82 fixed monthly payments required.
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Kohler KG125R-QS5- 125 kW Emergency Standby Power Generator (Aluminum) (120/208V 3-Phase)
Kohler KG125R-QS5- 125 kW Emergency Standby Power Generator (Aluminum) (120/208V 3-Phase)
Model: KG125R-QS5
How-To Articles





Standby (Liquid Cooled)

Run Watts

125,000 Rated Watts


120/208 Three-Phase


LP/Natural Gas



  • Kohler® 125kW Light Commercial Emergency Generator
  • For commercial buildings with 120/208V 3-Phase service
  • Premium 5-Year / 2000 Hour Limited Warranty
  • Backed by Kohler's extraordinary reliability & performance
  • Runs on Clean Burning Natural Gas & LP Vapor
  • Simple field conversion, while maintaining emission certification
  • Industrial-Grade, Kohler® 6.2L Liquid-Cooled Engine
  • Powerful, reliable Industrial-Grade design w/ hydraulic valve lifters
  • Runs at 1800 RPM for fuel efficient and quieter operation
  • Remarkable Power Quality
  • Exceptional voltage & frequency regulation w/ ultra-low THD
  • Clean power for even the most sensitive electronics
  • Fast-Response® X Excitation System
  • Easily handle full loads within 10 seconds
  • Kohler® APM402 Controller
  • Provides advanced control, system monitoring & system diagnostics
  • Integrated hybrid voltage regulator with +/- 0.5% regulation
  • Remote communication thru a PC via network / serial configuration
  • Digital Display & Menu Control
  • Provides easy to read local data access
  • Sound-Attenuating Aluminum Enclosure w/ 186 MPH Wind Load Rating
  • Fade, scratch, & corrosion-resistant powder-baked finish
  • Internal silencer & acoustic insulation keeps dB under 70 @ 7M
  • Local Emergency Stop Switch
  • Provides added safety when generator is operating
  • Includes Pre-Installed Block Heater
  • Provides easier generator starting & quicker warm up times
  • ***Not Compatible For Off-Grid Applications***
  • Approved for stationary standby applications in locations served by a reliable utility source
  • ^Please Note - Requires Loading Dock, Forklift or Crane For Delivery^


Product Specs
120/208 Three-Phase
60 Hertz
Rated Watts
125000 Watts
Fuel Type
LP/Natural Gas
NG Power Capacity
125000 Watts
LP Power Capacity
125000 Watts
NG Fuel Consumption @ 50% Load
1084 ft³/hr
NG Fuel Consumption @ 100% Load
1678 ft³/hr
LP Fuel Consumption @ 50% Load
11 gallons/hr
LP Fuel Consumption @ 100% Load
18.8 gallons/hr
Rated Amps
434 Amps
Decibel Rating @ 7m Learn More
Decibel Rating @ 7m
Sound levels are measured in decibels (dB). The lower the decibel rating, the less noise the product makes. As an example, a ticking watch is 20 dB while on the other end of the scale, a lawn mower is around 90 dB.
71 dbA
Transfer Switch
Automatic (Not Included)
Not Included (650 CCA)
Mounting Pad
Concrete (Not Included)
Cooling System
Liquid Cooled
UL Listed
Grade Type
Engine Brand
Starting System
12v Auto Start
6200 CC
Consumer Engine Warranty
5 Years
Commercial Engine Warranty
5 Years
Engine RPM
1800 RPM
Low Oil Alert/Shutdown
3340 Pounds
Made in USA
Consumer Warranty
5 Years
Commercial Warranty
5 Years
Product Length
138.8 Inches
Product Style
Standby Generator
Product Width
45.4 Inches
Product Height
65.5 Inches


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