Kohler Single Phase Generator - 20RESA/C

Front View Kohler 20RESC
Left side View Kohler 20RESC
Right Side View Kohler 20RESC
Front View Kohler 20RESC
Left side View Kohler 20RESC
Right Side View Kohler 20RESC

Key features

  • Reilable Kohler Command PRO Engine
  • 5 Years / 2,000 Hours Warranty
  • Free Site Assessments

Kohlers most popular generators for backup power. The 20RESA provides award-winning reliability and performance. When you lose power during an outage or storm, a hard-working 20 kW KOHLER® generator keeps your appliances working, the heat or AC running and your security system on. Also available in a three-phase option.

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  • 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.

The Power You Need

  • 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 the 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

The Conveniences You Expect

  • 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.


  • The Automatic Transfer Switch (ATS), please call to speak with a representative about this optional accessory.
EngineKohler CH1000 4-cycle
Bore and Stroke90mm x 78.5mm
Compression Ratio8.8 : 1
AmpsLPG=83amps; Natural Gas=75amps
Peak Starting Motor KVA @240V41kVA
Rated RPM60Hz=3600rpm. 50Hz=3000rpm
Max Engine Power at rated rpmLPG 30.9Hp; Natural Gas 27.1Hp
Ignition SystemElectric, Capacitive Discharge
Battery12V DC
Oil Capacity1.9L
Fuel TypesLPG, Natural Gas
Alternator Kohler, 2-pole, Rotating Field
Response Time10 Seconds
Enclosure MaterialAluminum
Dimensions (LxWxH)1.193m x 0.666m x 0.817m
Country of OriginUSA
WarrantyPremium five-year limited warranty
Model Number20RESA

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