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: 14RCA at 33kVA at 240V and 20RCA at 41kVA 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 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.

Kolher 20kW

  • Rated kW LP 20 kW
    Rated kW NG 18 kW
    Amps LP 83 amps
    Amps NG 75 amps
    Peak Motor Starting kVA @240 V 41 kVa
    Alternator Note All information shown is for 1 Phase 60 Hz generator with the largest alternator option available.
    Displacement 999 cm³ (61 cu. in.)
    Horsepower NG 27.1 HP, LP 30.9 HP
    Enclosure Material Aluminum
    Sound Output During Weekly Exercise 64 dB(A)
    Sound Output During Full-speed Operation 69 dB(A)
    Response Time 10 seconds
    Warranty Premium five-year limited warranty
    Country of Origin US
    Certifications/Listings cUL|EPA|UL 2200|CSA
    Automatic Transfer Switch Included No
    Remote Monitoring Available Included
    Off Grid / Utility Backup Utility Backup
    Weight 555 lbs. (252 kg)
    Alternator Type 2-Pole, Rotating Field
    Fuel Consumption on NG at 50% load? 161 cfh
    Fuel Consumption on LP at 50% load? 82 cfh
    Controller RDC2 Controller
    Cylinder Arrangement V-2
    Dimensions 1193 mm x 666 mm x 817 mm (47 in. x 26.2 in. x 32.2 in.)
    Engine Manufacturer/Description KOHLER
    Engine Model CH1000
    Engine/Alternator RPM 3600
    Fuel Type Natural Gas|LPG
    Frequency 60 Hz
    Phase Single Phase or Three Phase
    Voltage @ 60 Hz 120/240|277/480
    Digital Voltage Regulation ±1.0%
    Built in Mounting Pad Yes

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