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The Kohler 20kw composite standby generator system (200a standard switch) has been discontinued and is not available for purchase at this time.


Kohler 20kW Composite Standby Generator System (200A Standard Switch)

Kohler Power Equipment and Accessories
Model: 20RESAL
(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
9 Reviews
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  • Features
  • Specs
  • 16
  • 9
  • Articles
  • Accessories
Run Watts
Rated Watts
120/240 Single-Phase

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."

Fully Automatic Operation - Includes Automatic Transfer Switch

Kohler Command PRO® OHV Engine
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

New Silencer Reduces Sound Levels & Provides Quiet Operation
Maintains neighborhood solitude - approx 69 dB(A) at 7 m (23 ft)

New DC2 Controller
Glare-resistant, 2-line 16-character display - No More Codes
2.5-Amp 120V battery charger - eliminates separate 6-Amp charger
Built-in Ethernet card, no hardware needed for OnCue
Easily view ATS status via LED lights on controller
Real time clock allows you to easily set weekly exercise

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

RXT 200A Outdoor Automatic Transfer Switch (Non-Service Entrance)
Engine Brand
999 CC
Consumer Engine Warranty
5 Years
Commercial Engine Warranty
5 Years
Engine RPM
3600 RPM
Low Oil Alert/Shutdown
Product Specs
120/240 Single-Phase
60 Hertz
Surge Watts
2000 Watts
Rated Watts
20000 Watts
Fuel Type
LP/Natural Gas
NG Power Capacity
18000 Watts
LP Power Capacity
20000 Watts
NG Fuel Consumption @ 50% Load
161 (BTU: 161,000 BTU/HR) ft³/hr
NG Fuel Consumption @ 100% Load
281 (BTU: 281,000 BTU/HR) ft³/hr
LP Fuel Consumption @ 50% Load
2.3 (BTU: 208,725 BTU/HR) gallons/hr
LP Fuel Consumption @ 100% Load
3.9 (BTU: 353,925 BTU/HR) gallons/hr
Rated Amps
83 @ 240 Volts (Single Phase) Amps
Decibel Rating @ 7m
64 Test (69 Run) dbA
Transfer Switch
Automatic (Included)
Transfer Switch Amperage
Not Included (500 CCA)
A/C Ton Rating
Mounting Pad
Composite (Included)
Transfer Switch Style
Standard Installation
ATS Service Disconnect
Cooling System
Air Cooled
UL Listed
Grade Type
Made in USA
500 Pounds
Product Style
Standby Generator
Product Length
48 Inches
Product Width
26.2 Inches
Product Height
29 Inches
Consumer Warranty
5 Years
Commercial Warranty
5 Years
Need Help? Ask Our Experts.
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How-To Library
  16 Questions
Q: Does this unit include a battery? If not, how much is the battery and how much is the cold weather kit?

by Liz from New York on January 15, 2014

A: The battery is not included with the home standby generators and we do not sell the Kohler recommended battery. You can purchase a battery locally.....Group 51 with a minimum of 500 CCA (cold crank amps).

Here is the link to the Kohler carb heater....

Kohler Carb Heater

by Mike, Product Expert

Q: I'm looking at your Kohler models 20RESAL-SA6 and Kohler 20RESAL. What's the difference between the service disconnect switch and a standard switch?
by James Decker from Pennsylvania on December 26, 2013

A: When you are going to use the generator to power the entire home a service disconnect style type transfer switch is required by code as it is installed immediately after the electric meter before your main panel.

The standard model switch is used when there is already a separate service disconnect switch present immediately after the meter or if you are going to just power a sub-panel located after the main electrical panel.

by Mike, Product Expert

Q: Can the "outdoor" standard switch be installed indoors next to power panels?
by John from Washington on September 13, 2013

A: Thank you for your inquiry!

The Kohler RXT-JFNC-0200A is designed for the meet the rigors of outdoor installation, however it is not limited to just that. These switches may very well be placed indoors, so long as the local inspector will allow it. Use of this switch indoors meets the National Electrical Code, however each municipality has the right to their own interpretation of this code.

We would suggest checking with your electrician or at very least, the local building department for their requirements.
by Mike, Product Expert

Q: What size gas supply pipe is needed from tank to generator?
by Richard Evans from Pennsylvania on July 20, 2013

A: Fuel pipe size is based on the distance from the fuel source and for the Kohler models the recommended pipe size and max distances are listed in the installation guide and in the Kohler spec sheet....

Kohler Spec Sheet

by Mike, Product Expert

Q: Does the Kohler have load shedding like the Generac?
by Cecil from Texas on March 07, 2013

A: Kohler's load shedding is not built-in like Generac, it is a separately sold item.

The Kohler Load Control Module -

Kohler Load Control Module

This unit operates just like the Generac load manager.

by Mike, Product Expert

Q: What is the type and part number of the 200A Standard Transfer Switch that is supplied with the Kohler 20RESAL 20KW Standby Generator System advertised for $5199.00? What are all the specifications of this switch in doorout door, automaticmanual, number of circuits, voltagecurrent rating?
Thank you in advance for the follow up information.
Ron Beers

by Ron Beers from New Jersey on February 08, 2013

A: The following link shows the exact transfer switch included with Kohler generator model 20RESAL....

Kohler RXT-JFNC-0200A
by Mike, Product Expert

Q: How does the warranty work? Does it have to be installed by a Kohler certified dealer for the warranty work?
by Franz Gerster from New York on December 13, 2012

A: Kohler does not require a Kohler certified installer only a minimum would be a certified electrician.

When a Kohler installer does the installation and start-up the warranty starts the day he starts the unit.

When a certified electrician installs and starts the unit the warranty starts the day the unit was shipped from the factory.

All service and warranty work must be completed by an authorized Kohler service technician.

by Mike, Product Expert

Q: What is the purpose of a 200 amp transfer switch if it is not service entrance rated?
by Joel from New York on October 06, 2012

A: A service disconnect can be installed prior to the switch allowing for whole house applications or a specific "emergency" sub-panel can be installed with the switch connected to the sub-panel which the generator would power only.

by Mike, Product Expert

Q: Does the Kohler 20 kw 20RESAL come with a base or pad? if not what is required?
by Jim Mestl from New York on October 04, 2012

A: The unit has a composite pad already installed on the unit but a solid foundation base is required which can be either concrete, crushed stone or pea gravel a minimum of 3 inches thick.

by Mike, Product Expert

Q: Looking at the 20RESAL I see it comes with an outdoor transfer switch. Is this a service entrance rated switch and if not how much extra is it for the service rated one?
by Tommy Strickland from Louisiana on September 13, 2012

A: The switch in the 20RESAL is not service entrance rated. To get the 200A service rated switch you will need to buy each item individually (Generator & Switch).


RXT-JFNC-0200ASE - 200A Service Entrance Rated Switch

by Mike, Product Expert

Q: Jim, Is this item dual fuel or just one or the other NG or LP?
Also, what should I expect on ballpark pricing to have this unit installed by an electrician?
Finally, what does the Load control module do for me? Do I need it?

by Art Aldridge from Arkansas on August 31, 2012

A: This model will run on either LP or natural gas with the fuel selected at time of install. No additional parts are required.

Install costs vary. Anecdotal only, and based on my Kohler 18kW installed at my home, the install cost was $2200. This was for gas and electric connections. Mine was a 'middle of the road' install - only 20' from the meters & I did a service entrance switch mounted outside past the meter & between the load center.

If you go with a Generac machine, you can install DLM's or relay blocks to drop out certain high amperage loads which only allow them to power on if the generator has sufficient power remaining to start them. Unless you have multiple 4-5ton A/C units or other large amp draw items, this isn't needed on a 20kW. The best way to install a Kohler is to segregate the loads you want in a sub panel. Then you know that every time the generator starts you will be able to power up all of those items. And, 75amps is a lot of power that goes a long way to keep a home comfortable without utility power.
by Mike, Product Expert

Q: How many BTUs do the generators use? 20kw etc.
by Bob Diem from Maryland on August 07, 2012

A: 281,000 BTU/HR at Full Load.....You can find all the fuel consumption information on the manufacturers spec sheet available on the generator product page under the specs link.

by Mike, Product Expert

Q: Does the Kohler 20 RESAL have load shedding capability like the Generac Unit?
by Ronnierams from New Jersey on July 13, 2012

A: Yes, with the purchase of their Load Control Manager which needs to be installed by a certified link for details...

Kohler Load Control Manager

by Mike, Product Expert

Q: i need to use a service disconnect switch and will be installing the switch inside.What switch should i use and how much is the complete pkg deliveried.
by Charlie Smith from New York on June 15, 2012

A: You would need to purchase the 20RESA generator and the RXT-JFNC-0200SE switch. Click on the links below for pricing and add both items to your cart for total.

Kohler 20RESA Generator

Kohler RXT-JFNC-0200SE Switch

by Mike, Product Expert

Q: I just bought a 20resal and hooked it to my propane tank. What is the gas consumption rate of the generator?
by Carl Weber from Tennessee on April 08, 2012

A: LP Consumption (50% Load) = 2.3 gallons/hr

Spec Sheet

by Mike, Product Expert

Q: Hi Jim,
What is the difference between the 20resl and 20resal?
I don't see the composite pad on this unit 20resal?

by Steve from New Jersey on February 21, 2012

A: The new "A" version has the following features added:
** New Controller - RDC2/DC2
- New display readable in direct sunlight, 2 lines, 16 characters per line, no more codes.
- Built-In 2.5A battery charger using 120 VAC allowing deletion of the separate 6A battery charger
- Includes Ethernet Board, so no hardware required to be installed for OnCue
- RDC2 has built-in LED's on controller overlay to view status of RXT transfer switch and source availability while standing at the genset
- Real Time Clock - Allows setting of Exercise for any time and day you want
- Internal protection, no controller fuses to service
- Controller is fully potted for protection against snow and moisture

** New Silencer design to reduce sound levels
- 14RESA sound level during exercise is 63 dBA, and 67 dBA during normal operation
- 20RESA sound level during exercise is 64 dBA, and 69 dBA during normal operation

The composite pad is the same color as the entire unit and already attached to the bottom of the generator.
by Mike, Product Expert

Kohler 20RESAL Reviews & Ratings
9 Reviews  Sort by 
Jim W.
Hyampom, CA
Purchased from Power Equipment Direct
Purchased 4/13/13
Total Reviews
5 Reviews
Total Helpful Votes
53 Helpful Votes
5 out of 55 out of 55 out of 55 out of 55 out of 5
Kohler Standby/20resal
Since purchasing and installing this Generator, I have heard from a number of folks who say Kohler is the very best value. I agree. Keep in mind, however, that in order to to activate the warranty, it must either be installed by a "Kohler" dealer/installer, or at least have this individual inspect the installation and execute the "start-up" documentation. This cost me an additional $500 due to the remote area we live. The "Kohler" guy was able to identify some... more
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Purchased from Power Equipment Direct
Purchased 8/27/12
Total Reviews
3 Reviews
Total Helpful Votes
49 Helpful Votes
5 out of 55 out of 55 out of 55 out of 55 out of 5
Tips For New Buyers
I finally got the unit installed (the delay was from the local contractors & utilities; delivery was in two days) and it purrs like a kitten. The voltage under load varies by two, frequency by 0.3Hz.

You can get a transfer switch with the service disconnect built in. I was replacing the pole and forty year old meter/service disconnect. The new meter socket had an integrated 200 amp service disconnect/breaker so I really didn't need the disconnect in the transfer switch.

My electrician... more
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David M.
Southern Pines, NC
Purchased from Power Equipment Direct
Purchased 5/6/13
Total Helpful Votes
25 Helpful Votes
5 out of 55 out of 55 out of 55 out of 55 out of 5
Kohler Comes Through After High Wind Storm
I had just finished the installation of a the Kohler 20RESAL standby generator, with not a minute to spare! A front came through our area with 50+ mile an hour winds and rain, downing trees and knocking out power. We had finalized our setup, and tested the system for our customer only the day before. What a relief to get the call that they were with power when all around them everybody else was out for 24 -36 hours. My customer's father-in-law has me installing a system for them, and I hope to... more
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Luling, TX
Purchased from Power Equipment Direct
Purchased 6/21/12
Total Helpful Votes
17 Helpful Votes
5 out of 55 out of 55 out of 55 out of 55 out of 5
Purchase Of Generator
Well the Generator shows up in good condition, while getting the contractors together to install the propane/electric, had a power outrage in the area. Sure would a been nice to have the generator going. l live out in the sticks and power goes out alot.

Got it installed now, it big enough to power the needed items to run the home ...ran a few test runs see if it will do the job.
I'm very pleased with the product ..thanks guys/gals for your excellent service
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Ruth & Ray B.
Dubach, LA
Purchased from Power Equipment Direct
Purchased 8/7/12
Total Helpful Votes
16 Helpful Votes
5 out of 55 out of 55 out of 55 out of 55 out of 5
North La Generator For Our Home
Our newly purchased generator has been a very good experience for us. Electric Generators Direct made this purchase easy and we are so pleased with the ordering process, shipping(free), and the actual delivery.

This process is the way to go. Thanks to all who helped us through. You are to be commended for your courtesy and our generator is soooooo nice!
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Craigsville, WV
Purchased from Power Equipment Direct
Purchased 10/29/12
Total Helpful Votes
15 Helpful Votes
5 out of 55 out of 55 out of 55 out of 55 out of 5
Ready And Able
Our generator is installed and ready to back up utility power when the need arises. I was surprised our system was not the latest RDC2 controller.

I do understand the Generator demand power outages has caused in the east this year so I was not upset. However, we are very very happy with the ease of installation and setup.

Your professional service all the way to delivery was a great experience.
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Westbury, NY
Purchased from Power Equipment Direct
Purchased 6/4/12
Total Reviews
2 Reviews
Total Helpful Votes
14 Helpful Votes
5 out of 55 out of 55 out of 55 out of 55 out of 5
Safe & Secure
My job is to provide safety and as little inconvenience to my family. This Kohler 20kW Home Standby Generator has been greeted with priceless smiles. Photo's and Video to follow.
Was this review helpful?
Purchased from Power Equipment Direct
Purchased 9/29/12
Total Helpful Votes
17 Helpful Votes
5 out of 55 out of 55 out of 55 out of 55 out of 5
My Story
After spending weeks considering various generators, I chose this one- one reason being that it came with a composite base, another being the 5-year warranty.

Everything arrived on time and was as advertised. I had it off-loaded from the semi onto a cart (2000 pound capacity) pulled by my riding lawnmower. Getting it sited was somewhat a chore as it weighs 500 pounds and we had to go up a grade and around bushes and trees next to the house where my riding lawnmower had no traction (or... more
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Amenia, NY
Purchased from Power Equipment Direct
Purchased 10/29/12
Total Helpful Votes
14 Helpful Votes
5 out of 55 out of 55 out of 55 out of 55 out of 5
Home Owners
I received the generator a month ago but just got it up and running today.
Up until now all I could say was nice case.
Now I can say It does as advertised and we are pleased with it.
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