generac vs kohler 20kw generator


Power outages can be a real problem for homeowners, especially during extreme weather conditions. Having a reliable generator to provide backup power is essential in such situations. Generac and Kohler are two well-known brands in the generator market that offer quality products with excellent features, giving consumers a tough choice to make. In this review, we’ll take a closer look at the Generac and Kohler 20kw generators, evaluate their performance, compare their costs, and offer recommendations to help you make the right choice.

Product Overview

Both Generac and Kohler offer 20kw standby generators that can power an entire home. The Generac 7039 and the Kohler 20RESCL-200SELS are the two models we’ll focus on for this review.

Generac 7039

The Generac 7039 has a 999cc Generac G-force engine that delivers 20,000 watts of backup power, making it ideal for large homes. It comes with a Quiet-Test mode that runs weekly self-diagnostic tests at a low volume to ensure everything is functioning optimally. The generator runs on natural gas or propane and has a fuel consumption rate of 3.47 gallons per hour at a 50% load. This generator boasts a 5-year limited warranty.

Kohler 20RESCL-200SELS

The Kohler 20RESCL-200SELS has a 999cc Kohler engine that delivers 20,000 watts of backup power. It comes with OnCue Plus Generator Management System that enables remote monitoring and management of the generator. This generator runs on natural gas or propane and has a fuel consumption rate of 3.24 gallons per hour at a 50% load. The Kohler generator has a 5-year limited warranty.

Performance Comparison


Both generators require professional installation, and the process is somewhat similar. However, the Kohler 20kw generator is less complicated to install and takes a shorter time than the Generac.

Reliability and Durability

In terms of reliability, both generators are quite dependable. They have a solid reputation for smooth operation, with occasional hiccups being promptly resolved under warranty by the manufacturers.

Both the Generac and Kohler generators are sturdy and durable, with weather-resistant enclosures that protect them from harsh environmental elements.

Notable Drawbacks

While both the Generac and Kohler generators are high-quality products, there are a few minor drawbacks to note.

The Generac 7039’s control panel could be overwhelming for some users, and the generator’s enclosure is not as soundproof as the Kohler 20kw model.

On the other hand, some customers have reported that the Kohler 20kw’s customer support was not very helpful, and the generator produces more vibration than the Generac 7039.

Customer Reviews

Reviews from customers who have used both generators provide useful insights into their experiences. The Generac 7039 and the Kohler 20RESCL-200SELS have received many positive comments, with some minor negative feedback.

Customers praise the Generac 7039 for its user-friendly control panel and its powerful engine, with the peace-of-mind that comes with the 5-year limited warranty.

The Kohler 20RESCL-200SELS has received good reviews, especially for its OnCue Plus Generator Management System and remote monitoring features, but some users have reported unhelpful customer support during issues that arise.

Cost Comparison

It’s essential to understand the costs involved in purchasing, installing, and maintaining a generator, as these costs can add up significantly over time.

The Kohler 20kw is more expensive than the Generac 20kw. However, the Kohler generator’s shorter installation time, quicker routine maintenance, and remote monitoring features can offset the initial purchasing cost in the long run.


While both the Generac 7039 and the Kohler 20RESCL-200SELS are excellent generators, the Kohler 20kw model edges out the Generac 20kw in terms of performance and features, especially with the remote monitoring features offered by the OnCue Plus Generator Management System. However, this comes at a higher price point, making the Generac 7039 an affordable and reliable option for those on a tighter budget.

Regardless of which generator you choose, make sure to consider all the costs involved, including installation, maintenance, and warranty, to make an informed decision to ensure your home is powered when you need it.

List of 10 generac vs kohler 20kw generator

SaleBestseller No. 1
Generac 6485 Scheduled Maintenance Kit for 20kW and 22kW Standby Generators with 999cc Engine , Black
  • Scheduled maintenance kit is for standby home generators
  • For use with the 20kW and 22kW air cooled standby generators from 2013 or later (999cc engine)
  • Maintenance is recommended every 200-hours or 2-years
  • Includes a pre-cleaner, air filter, oil filter, oil funnel, (2) spark plugs, blue cloth, instruction manual and maintenance sticker
  • Oil must be purchased separately
Bestseller No. 3
Generac 0J93230SSM 20Kw-22Kw SM 999 Maintenance Kit (Synthetic Oil)
  • Genuine OEM Generac parts
  • Genuine OEM Generac Part
  • Fits Specific Generac Engine Models That Require This Part Number
SaleBestseller No. 4
Generac 2 Pack Genuine 070185ES Oil Filter Fits 070185E 70185 OEM
  • Brand New (2) Pack of Genuine Generac Oil Filters... We are an Authorized Generac Dealer... (2) Pack of Oil Filters Genuine Generac Part # 070185ES Supercedes Old Part #'s 70185, 70185B, 070185E 90 mm Fits Specific Generac Engines Genuine OEM Generac Part
SaleBestseller No. 5
Generac 8250 GP2500i 2,500-Watt Gas-Powered Portable Generator, CARB Compliant
  • 50 State Configuration/CSA
  • Compact and Lightweight
  • Makes transportation easy with built-in handle
  • Automatically adjusts engine speeds to save fuel and reduce sound emissions
  • Alert you when unit is low on oil, overloaded or ready-to-use
Bestseller No. 6
Generac 0J93220SSM Maintenance Kit w/ 5W-30 Synthetic Oil
  • Genuine OEM Generac products
  • Keep your generator running at optimum performance
  • Kit contains: (2) Quarts - 5W-30 Synthetic Oil, (1) Oil Filter, (1) Air Filter, (2) Spark Plug, (1) Funnel, (1) Chamois,(1) Preventative Maintenance Reminder Sticker
  • Works with model: 0062400
  • Please note: Consult owner's manual for proper part number identification and proper installation
Bestseller No. 7
Generac 0J57680SSM 20kW Service Maintenance Kit
  • Brand New Genuine Generac 0J57680SSM Service Maintenance Kit 999 20kW 5W30 Synthetic Oil...
  • Genuine Generac Part # 0J57680SSM
  • Fits Specific Generac Models
  • Fits Specific Generac Engine Models That Require This Part Number
  • Genuine OEM Generac Part
Bestseller No. 8
Generac 7043 22kW Air Cooled Guardian Series Home Standby Generator with, 200-Amp Transfer Switch
  • Up to whole house protection with the 200 Amp, NEMA 3R (aluminum outdoor enclosure) smart switch
  • Smart, User-friendly controls; Generac evolution controller features a multilingual LCD display that allows you to Monitor Battery status and track maintenance intervals to ensure your generator is always in top operating condition
  • 240 volts supply
  • Receive real time status updates
Bestseller No. 9
Generac Guardian 24kW Home Standby Generator with PWRview Transfer Switch Wi-Fi Enabled
  • Save up to 8,000 dollars in product and installation costs (when compared to competitive output products)
  • Takes up 70% less space (when compared to competitive output products)
  • PWRview, Generac's home energy management system, allows generator owners to monitor and manage home energy usage, leading to a reduction in electric utility bills of up to 20%
  • Using PWRview you could save enough to pay for your generator
Bestseller No. 10
Generac Power Systems 6485 20-22KW HSB Maintenance Kit
  • Durable product
  • This product meets the customer requirements
  • Manufactured in China

People also ask

What is Generac vs Kohler 20kw generator?

Generac vs Kohler 20kw generator is a comparison of two popular brands of generators that have a capacity of producing 20,000 watts of power. These brands have been in the market for several years and have earned a reputation for producing durable, high-performance generators.

What are the differences between Generac and Kohler 20kw generators?

The main difference between these two brands is the level of customization offered. Generac generators offer greater customization options than Kohler generators. Additionally, Generac generators are generally considered more user-friendly than Kohler generators.

Which brand is best for home use?

Both brands are suitable for home use. Generac generators are more affordable and offer greater customization options, while Kohler generators are more sophisticated and offer more advanced features. Ultimately, the best brand for your home will depend on your specific needs and budget.

Are Generac or Kohler generators more reliable?

Both Generac and Kohler generators are highly reliable brands. Generac generators have a reputation for being more durable and lasting longer, while Kohler generators are known for being more sophisticated and advanced.

Which brand offers better customer support?

Both Generac and Kohler offer excellent customer support. Generac has a larger network of authorized dealers and service centers, which makes it easier to find support in remote areas. Kohler has a strong reputation for customer support, with a 24/7 customer service hotline.

What is the price difference between Generac and Kohler 20kw generators?

Generac generators are generally more affordable than Kohler generators. The price difference can vary depending on the specific model and features, but in general, Generac generators are priced lower than Kohler generators.


Choosing between Generac and Kohler 20kw generators ultimately comes down to your specific needs and budget. Both brands offer excellent quality and reliability, with slight differences in customization options and advanced features.