Kohler 20KW Generator Review- Is It Worth Buying?

Ian Mutuli
Updated on
Ian Mutuli

Ian Mutuli

Founder and Managing Editor of Archute. He is also a graduate architect from The University of Nairobi, Kenya.
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Kohler 20RESCL-200SELS Air-Cooled Standby Generator...
  • 20,000-watt air-cooled generator automatically starts up when the...
  • Includes 200 Amp whole-house, service entrance rated, load...
  • Fast response--power to your home in 10 seconds; premium power...
  • 100% corrosion-proof enclosure offers protection from even the...
  • Measures 48 by 26.2 by 29 inches; 5-year/2000-hour limited...

If you want to keep all your essential appliances operating or untie yourself from the grid, a standby generator will provide an on-demand source of power. The Kohler 20kw generator is a perfect option if you want a home standby generator for a mid-to-large sized home. In this article, we will review the Kohler 20kw generator.

Why is Kohler Home Standby Generator a Good Choice?

Kohler is a brand that has been leading in the generator industry for a couple of years for having quality and high-performance products. Most Kohler generators are relatively affordable compared to other products in the same category. The amazing part is that they will have you coved in case of an unexpected power failure. The Kohler generators are approved for stationary standby applications locations served by a reliable utility source.

Kohler 20KW Generator Review

The Kohler generators are designed with powerful engines and a Powerboost technology that will allow you to use them for different purposes like residential or outdoor events. The amazing thing is that the clean power quality of these generators will also work perfectly for devices like phones, mobile or even laptops. Again the generator management system is standard with each RESVL or RESV generator.

The Kohler 20kw generator is one of the best generators that will help keep your basic appliances, heat or central air conditioners and security system running. They will also offer advanced voltage and frequency regulation for excellent generator power quality. First, let's look at the Kohler 20kw generator review.

Kohler 20kw Generator Review

The Kohler 20kw standby generator is one of the most dependable or reliable home generators in the current market. The build is robust, consistent and durable and when it comes to providing backup electricity at home it is exceptionally great.

Kohler 20KW Generator Review

The Kohler 20RESCL-200SELS Air-Cooled Standby Generator is perfect for backup power. Although this Kohler generator does not provide the highest energy power quality, it will provide enough energy to serve a mid-to-large sized home. In addition, its power boost technology means it can effortlessly power an air conditioner, major appliances, and electronics automatically.

This Standby Generator with Automatic Transfer meets all the emission specifications set by California Air Resources Board (CARB) and EPA. Even better, you can operate them with either LP gas or natural gas. Again this home standby generator has an automatic transfer switch to start and run automatically during power outages without your intervention.

Additionally, with OnCue Plus Generator Management System, you can view the Generator's status using smart devices like your iPhone, iPad, Mac and Android devices. The best part is that it can power up major appliances, air conditioners, and electronics based on Generator and load size.

1. Engine

Kohler generator is powered by Command Pro CH1000 air-cooled engine with hydraulic valve lifters. This engine can reach a maximum horsepower of 32, which will turn the generating unit at around 3600 rpm underneath max load conditions. In addition, it has a fully pressurized oil lubrication system that helps provide an unattended run time.

Unlike many other generator brands like Generac, Kohler has made engines for more than 40 years now. As a result, the manufacturers have built engines that will last and work well in different weather conditions.

2. The Power Boost

The Kohler home standby generator has a Powerboost tech that delivers enough power to operate high-power appliances without power shortages. It also offers a low-level harmonic distortion, making it safer to use with sensitive electrical appliances like tv or mobile phones.

Boosted by the reliable pro engine, specifically designed and tested, the Powerboost technology will offer extended operation. Plus, the OnCue Plus Wireless Generator Management Systems and OnCue® Plus Remote Monitoring System work hand in hand with this tech to ensure that you know the status of your Generator.

3. Fuel choices

The 20RESCL-SELS generators run on either liquid propane/ LP gas or natural gas making it an excellent option if you're looking for a dual fuel generator. The conversion is usually done in the field during installation. Mainly the fuel consumption of the Generator will depend on the load. As load changes each minute, so does fuel consumption.

The LP gas fuel type will provide higher power capability that can go up to 20 kilowatts, unlike the natural gas that only goes up to 18 kilowatts. At half old, the fuel consumption will be 2.2 gallons, half fuel consumption at maximum load. The natural gas fuel type uses 281 cubic feet every hour.

4. Automatic Transfer Switch

This great Generator comes with an automatic transfer switch that works with the DC2 controller. The main job of the transfer switch is to continuously monitor the electrical current and send data to the data controller. When you lose power or the utility power falls to ultra-low levels, there is usually a short delay that prevents the engine from starting at the time of a momentary outage.

First, the engine starts, it reaches the operating speed, and then the transfer switch automatically moves your home power source to the generator power. Let's say the utility power is restored, and the Generator will use its cooling system to cool it down before it shuts down. However, it will not go through the cooling process before your home has moved back to using the utility power.

This 200ASE has a Load Control Module (LCM) or Load Shed kit installed with a Memo 3r aluminum enclosure. The load shed kit monitors voltage current and frequency regulation to decide when to shed loads. Also, the Generator has two relays to restain two independent air conditioner loads, ensuring there is no dropping power.

5. Controller

This Kohler generator features a controller that usually works with the automatic transfer switch to ensure you receive enough power during an outage. The controller has a four-button, an LCD display and LED indicators to show if the Generator is on or off.

The LCD display will provide a scrolling system with eight functions, including voltage regulation, frequency, maintainers reminders and the general generator power status. In addition, the display will also display diagnostic messages for the engine, load control module, transfer switch statues, alternator statues and the programmable interface module.

6. Housing/Enclosures

Having a generator with good housing is as good as having a high-quality generator. The enclosures or generator housing will protect the unit from harsh elements and keep it from animals or children. Most of the inexpensive generators from Kohler are enclosed using powder-coated aluminum or steel, which is fairly durable.

The generators with a mid-range prize have more corrosion and weather-resistant enclosure. With the 20kw Generator, you can be assured that the housing will be good enough to keep your generator safely. This way you will not experience safety issues like electrocution o fire breakouts. In addition, the Generator itself is designed with high-quality material that is good enough in case of extreme weather,

7. Environmental Impact

As we have stated earlier, these Kohler generator has different fuel options, and you can choose to use LP gas or natural gas. This way, you can use a clean gas that will not necessarily have a negative impact on the environment, making it a perfect option to use in your home.

Additionally, the home standby generator meets California's strict carbon emission standards since it is CARB compliant. This way, you can purchase and use the Generator without the fear of harming the environment around you.

8. Noise Levels

Amazingly the 20RESCL-SELS has a great enclosure or housing made of polymer. The polymer housing is rust and corrosion-free, but it will also dampen the sound levels. Essentially, these generators are quiet, and they will emit 69 to 73 DB, which is as loud as your kitchen blended o garbage disposal. So even though these Generator does not have their decibel rating indicated, they are not as loud as most generators.

9. Appearance and design

Kohler is a well-known brand that produces well-built and high-quality generators that give you peace of mind each time the power fails. The unit has a polymer housing that is rust and corrosion-free. Again as we have mentioned, the engine og this Generator is weather-resistant, and it can serve you for years.

These units come with 48 inches, 26 inches and 29 inches dimensions and you can easily lock them inside the housing since the top of the enclosure is hinged. A lid lifts underneath the lockable enclosure, allowing easy access to the oil dipstick, filler, oil filter, and other essential generator parts.

The amazing bit is if you are having issues with your Kohler generator, you can easily get in touch with their customer care services or with a representative of Kohler to get the issue solved. Plus they have a lot of local representatives in various areas, meaning you can meet with a specialist if you additional information or help.

9. Warranty

All Kohler generators usually have warranties which will vary depending n the make. For instance, the Kohler portable models will usually come with a 3-year warranty. But, amazingly, the 20 kW generator usually has a 5 year or 2000 hours limited warranty, usually more than most manufacturers offer.


  • Automatically start within the first 10 seconds of a power outage
  • Worth investment since it comes with a five year or 2000 hour limited warranty
  • Has a 200 AMP transfer switch that turns the
  • Generator on automatically
  • Offers 20 kilowatts of power that will keep all your appliances working
  • Come with a Poweboost technology that will provide exceptional starting power
  • Can run with two fuel types: natural or propane
  • Runs more quietly than other generators in its category
  • Has rust and corrosion-proof housing or enclosure
  • Offers off-grid applications
  • Restores power to a 5-ton air conditioner and other major appliances
  • Offers frequency and voltage regulation on an industry-leading rank
  • Provides more power than some comparable brands
  • Has low levels of harmonic distortion to safeguard sophisticated electronics
  • Safe power source and environmentally friendly performance
  • Offer free shipping service means the freight company will deliver to your address
  • Free Liftgate Service is included.


  • Kohler generators are more expensive than most other brands
  • The fuel types used tend to be very expensive in some areas


  • Dimensions - 48″ x 26.2″ x 29″
  • Weight – 580 Ibs or 252 kg
  • Horsepower: NG 27.1 HP, LP 30.9 HP
  • Sound Output During Full-speed Operation: 69 dB and 64 on weekly excise
  • Certification: EPA
  • Response Time: 10 seconds
  • Engine: Kohler's Command Pro CH1000 air-cooled engine
  • Fuel Type: LPG, Natural Gas
  • Frequency: 60 Hz and @ 60 Hz: 120/240|277/480 Voltage
  • Warranty – 5 years

Alternative to Kohler 20KW Generator

The Kohler Generators 24RCL Standby Generator is a great alternative to the 20kw. These Kohler 24RCL 24000 Generators are powered by a 2.2l commercial-grade engine with an operating speed of 1800 rpm, making it an ideal option for whole-house or business operations without dropping power. Plus, it powers up automatically and keeps you connected to power in ten seconds after a power outage.

Like the 20KW, the Kohler 24KW is fueled using natural gas or liquid propane/ LPG offers an effective operation. The 24KW generator management system is super powerful, and it provides 100 AMPs while using LP and 87 AMPs while using natural gas. You are guaranteed premium power quality that will offer digital voltage and frequency regulations with this option.

Again like the 20KW Generator, this Generator has OnCue® Plus Wireless Generator Management System /remote monitoring system and Load Control Module (LCM) or Load Shed kit, which is compatible with single-phase generators. The 24000 W can power multiple appliances with high wattage, making it ideal for home and business usage. The best bit is that it can keep your heat or AC running with the home security system.

Final Verdict

We conclude that home standby or whole house generators are worth purchasing if you regularly experience power failures. These generators are more reliable and powerful, meaning they will help you stay connected each time you need them. Again they are designed with high-quality material, and they can withstand any weather conditions.

Comprehensively, the Kohler 20RESCL-200SELS Air-Cooled Standby Generator is a safe and affordable option that you could consider purchasing. It is perfect if you want power back up for a large or mid-sized home or a small business.

Image credit: i.pinimg.com

Ian Mutuli

About the author

Ian Mutuli

Founder and Managing Editor of Archute. He is also a graduate architect from The University of Nairobi, Kenya.
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