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The Kohler 30resa - 30 kw emergency standby generator w/o oil makeup kit is available for purchase today.

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Kohler 30RESA - 30 kW Emergency Standby Generator w/o Oil Makeup Kit

(Based on expert analysis, manufacturer ratings and customer reviews)
5.0 out of 55.0 out of 55.0 out of 55.0 out of 55.0 out of 5
2 Reviews
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Liquid Cooled Standby Generators
30 kW
Rated Watts
Need Help? Call Our Generator Experts.

General Motors Vortec® DOHC 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)

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

Quiet Operation
Maintains neighborhood solitude 68 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
Simple field conversion between natural gas and LP

Galvanneal® Steel Enclosure
Rodent-proof construction

Transfer Switch Sold Separately

Fork Lift or Loading Dock is Required for Delivery

  Model Number:30RES
 Made in USA:Yes
 Brand:GM Vortec
 HP/CC:50 HP
 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 SystemLiquid Cooled
 Fuel TypeLP/Natural Gas
 NG Power Capacity27,000 Watts
 LP Power Capacity30,000 Watts
 NG Consumption (50% Load)300 ft³/hr (BTU: 300,000 BTU/HR)
 LP Consumption (50% Load)3.4 gallons/hr (BTU: 308,550 BTU/HR)
 Rated Amps:125 Amps @ 240 Volts (Single Phase)
 Decibel Rating @ 7m:68 db(A)
 A/C Ton Rating5-Tons
 Mounting PadConcrete (Not Included)
 Transfer Switch:Automatic (Not Included)
 Battery:Not Included (525 CCA - Battery Group 26R)
 UL ListedYes
 Weight:1046 Lbs. (474.47 kilograms)
 Dimensions:77L x 33.5W x 45H
(195.58 x 85.09 x 114.30 cm)
 Consumer Warranty:5 Years
 Commercial Warranty:5 Years

*Ask Mike about the Kohler 30RES. Sorry, no repair questions:




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  1 Question
Q: I am looking at the 30kw unit with the gm 4cyl motor. My concern is the operating rpm of 3600, it seems a bit high for a sustained amount of time for an automobile engine.

by Ed Imsland from California on January 24, 2011

A: 3600 RPM is standard on many portable and standby generators.

If you are looking for something in a lower RPM, check out the models available that operate at 1800 RPM for lower noise and fuel consumption.

QuietSource 22-48kW

by Mike, Product Expert
Kohler 30RES Reviews & Ratings
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2 Reviews  Sort by 
Stephen Jackson
Addis, LA
Total Reviews
2 Reviews
Total Helpful Votes
18 Helpful Votes
5 out of 55 out of 55 out of 55 out of 55 out of 5
Kohler 35 Res
I selected the 30RES but I really have a 35RES model. Right after power was restored following hurricane Gustav, I looked at generator sets.

I liked the Kohler 35RES because it had a GM V-6 engine without a timing belt. The engine runs at 1800 rpm which saves wear and tear plus fuel.

I have the RDT 200 amp automatic transfer switch. The system was installed 12/23/2008. The first time that it ran in the automatic mode was about six months after it had been installed. I came home to... more
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Purchased from Electric Generators Direct
Purchased 11/29/12
5 out of 55 out of 55 out of 55 out of 55 out of 5
Kohler Generator
High quality product, runs the house. The only problem was, the instructions say to connect the control wires to 3 and 4 in the generator, there is a terminal block that is numbered from 1 to 16, Make sure you look at the larger white wires, they are number, don't look at the numbered terminal block. We hooked it to the 3 and 4 terminal block and blow a $327.00 control board. Something easily over looked. Other than that a very nice machine.
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Free Freight
  • Ships via Semi-Truck
  • Requires a loading dock or forklift
  • Free to Lower 48 States
We currently CANNOT ship this product to Alaska, California, Hawaii or any destination outside of the United States
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Shop for the Kohler 30RESA - 30 kW Emergency Standby Generator w/o Oil Makeup Kit at Electric Generators Direct. Research Kohler standby liquid-cooled generators online. Find Kohler 30RES standby liquid-cooled generators & Kohler 30 kW model 30RES generator system features and specifications. Get the best deal; compare Kohler 30RES prices now. Buy the 30RES direct and save.