Kohler 20 kW Generator

  • $4,909.10
    Unit price per 

20 kW Generator



Our most popular generators for backup power provide award-winning reliability and performance. When you lose power during an outage or storm, a hard-working 14/20 kW KOHLER® generator keeps your appliances working, the heat or AC running and your security system on. Now also available in 3 phase.*

  • Reliable.
    Every KOHLER® generator is equipped with a heavy-duty, commercial-grade engine that stands up to extreme weather.
  • Powerful.
    In just 10 seconds, your KOHLER generator automatically restores power to a 5-ton (60,000 BTU) air conditioner, major appliances and electronics.*
  • Premium warranty.
    We've got you covered with 5-year, 2,000-hour protection, and a corrosion-proof enclosure that's built to last.
  • Award winner.
    KOHLER generators have received several awards, including the Most Valuable Product (MVP) Award 2010 by Building Products magazine.


  • PowerBoost™ technology provides power to start large loads such as central air conditioners without dropping power to other appliances
  • Extraordinary peak motor-starting capacity: 20RESD at 40.5kVA at 240V
  • Premium power quality delivers exceptional digital voltage and frequency regulation along with low levels of harmonic distortion to protect sophisticated electronics
  • Powered by reliable KOHLER Command PRO® engine, designed and tested for tough commercial applications; with hydraulic valve lifters to eliminate need for lengthy break-in periods and expensive valve adjustments; operation speed is 3600 rpm (the standard for air-cooled generators)
  • Compatible with optional OnCue® Plus and OnCue® Plus Wireless Generator Management Systems, and Programmable Interface Module (PIM)
  • Also compatible with Load Control Module (LCM) or Load Shed kit with single-phase generators only


  • RDC2 controller designed for today's sophisticated electronics manages both the generator set and Model RXT transfer switch functions
  • Quiet, neighborhood-friendly operation with sound levels similar to a typical central air conditioner
  • Stylish corrosion-proof enclosure impact tested to -30°F
  • Runs on either natural gas or liquid propane (LPG) with simple switching between natural gas and LPG in the field
  • Streamlined installation, simple terminal block for easy field connections. Kohler also offers concrete mounting pads to lower installation costs and time.
  • Streamlined installation, simple terminal block for easy field connections. Kohler also offers concrete mounting pads to lower installation costs and time.

*Based on generator and load size.


Rated kW LP20 kW

Rated kW NG18 kW

Amps LP83 amps

Amps NG75 amps

Peak Motor Starting kVA @240 V40.5 kVa

Alternator Note

All information shown is for 1 Phase 60 Hz generator with the largest alternator option available.

Displacement999 cm³ (61 cu. in.)

HorsepowerNG 27.1 HP, LP 30.9 HP

Enclosure MaterialComposite

Sound Output During Weekly Exercise64 dB(A)

Sound Output During Full-speed Operation69 dB(A)

Response Time10 seconds

WarrantyPremium five-year limited warranty

Country of OriginUS

Certifications/ListingscUL|UL 2200|EPA|CSA

Automatic Transfer Switch IncludedNo

Remote Monitoring AvailableYes

Off Grid / Utility BackupUtility Backup

Weight530 lbs. (240 kg)

Alternator Type2-Pole, Rotating Field

Fuel Consumption on NG at 50% load?161 cfh

Fuel Consumption on LP at 50% load?82 cfh

ControllerRDC2 Controller

Cylinder ArrangementV-2

Dimensions1215 mm x 802 mm x 733 mm (47.9 in. x 28.8 in. x 31.6 in.)

Engine Manufacturer/DescriptionKOHLER

Engine ModelCH1000

Engine/Alternator RPM3600

Fuel TypeLPG|Natural Gas

Frequency60 Hz|50 Hz

PhaseSingle Phase

Voltage @ 60 Hz120/240

Digital Voltage Regulation±1.0%

Built in Mounting PadYes