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The Kohler 20res - 20kw home standby generator (composite enclosure) has been discontinued and is not available for purchase at this time.

Kohler 20RES - 20kW Home Standby Generator (Composite Enclosure)

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  • Specs
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Run Watts
Rated Watts
Surge Watts
Starting Watts

Product Video Disclaimer: "PED is not responsible for any variances from the product in this video and the item you purchase. Please review all product specs prior to purchase."

Kohler Command PRO® OHV Engine
Meets emission regulations for U.S. EPA & California
Powerful and reliable engine with hydraulic valve lifters

PowerBoost™ Technology
Greater motor-starting ability for large electrical loads

Cleaner Power for Sensitive Electronics
Protects sophisticated electronics with low distortion (THD)

Fast Response
Kohler™ generators restore power in as little as 10 seconds

Quiet Operation
Maintains neighborhood solitude - approx 73 dB(A) at 7 m (23 ft)

ADC-RES Advanced Digital Control
Digital voltage regulation & engine speed governing
LED display shows system status and setup information

Easy Installation
Polymer base eliminates the need for a concrete pad
Simple field conversion between natural gas and LP

Exclusive 100% Corrosion-Proof Composite Enclosure
Will not rust - even in harsh seaside environments

Transfer Switch Sold Separately
  Model Number:20RES
 Made in USA:Yes
 HP/CC:30 HP/999 cc
 Consumer Engine Warranty:5 Years
 Commercial Engine Warranty:5 Years
 Engine RPM:3600 RPM
 Low Oil Alert/Shutdown:Yes
Product Specs
 Voltage120/240 Single-Phase
 Frequency:60 Hertz
 Cooling SystemAir Cooled
 Fuel TypeLP/Natural Gas
 NG Power Capacity18,000 Watts
 LP Power Capacity20,000 Watts
 NG Consumption (50% Load)161 ft³/hr (BTU: 161,000 BTU/HR)
 LP Consumption (50% Load)2.3 gallons/hr (BTU: 208,725 BTU/HR)
 Rated Amps:83 Amps @ 240 Volts (Single Phase)
 Decibel Rating @ 7m:73 db(A)
 A/C Ton Rating5-Tons
 Mounting PadComposite (Included)
 Transfer Switch:Automatic (Not Included)
 Battery:Not Included (500 CCA)
 UL ListedYes
 Weight:500 Lbs. (226.80 kilograms)
 Dimensions:48L x 26.2W x 29H
(121.92 x 66.55 x 73.66 cm)
 Consumer Warranty:5 Years
 Commercial Warranty:5 Years
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  2 Questions
Q: I've heard that a Kohler dealer must do the "startup" of the generator, otherwise the warranty is void. Dealers in this area seem to charge big $$ for this service. What's the deal?
by Woody Montreaux from Massachusetts on February 22, 2011

A: This is correct. A Kohler dealer must do the "start-up" to preserve the manufacturers warranty.
by Mike, Product Expert

Q: Hi
I am upgrading from a 6.3 KW Propane Kohler to this 20KW - I hope! My feed line is 7/8" OD and I figure about 1/2" ID, will that give me enough fuel supply to this unit?

by Dan Elmendorf from New York on January 19, 2011

A: Generator fuel pipe sizing is based on the wattage size of the unit along with the distance from the fuel source. Kohler does list the pipe sizes in the specification sheet for each model. We list the specification sheet within the specs tab to the left of the Q & A tab.

Spec Sheet
by Mike, Product Expert

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Shop for the Kohler 20RES - 20kW Home Standby Generator (Composite Enclosure) at Electric Generators Direct. Research Kohler standby air-cooled generators online. Find Kohler 20RES standby air-cooled generators & Kohler liquid propane vapor and natural gas operated generator system features and specifications.