The Best Construction Diesel Generators for 2022

By Kevin Malone

When it comes to fully independent power or a highly reliable backup power source, a generator keeps you going. Both fixed and portable generators have essential roles in diverse construction applications. If you work in situations with high energy demands, diesel generators should be top-of-mind and are a 'must-have' for any serious contractor.

At Intech Equipment and Supply, we stock generators that are hand-picked by experts who understand spray foam and roofing contractors' needs. So, you can be sure that all of them have undergone serious scrutiny. Here are our top recommendations for the best diesel generators in 2022.

Why Diesel Generators?

A powerful generator is a must in today's demanding construction market. Since engines powered by diesel fuel tend to have more fuel economy than gas versions, it is no surprise that contractors tend to prefer diesel generators. Diesel is thicker than gas, which means it has a slower evaporation rate. Its higher price is sometimes a deterrent, but it costs less in the long run because less fuel is required to do the same job.

Diesel-powered engines are also simpler than gas engines because they do not have spark plugs or other electrical parts found in gas engines. Simpler machines are always easier to maintain, cost less to fix and require less troubleshooting, making them an attractive option for contractors. So which diesel generators made the cut for inclusion in the Intech online store?

WINCO DE Series Generators

In 2012, WINCO unveiled a new line of simplified diesel generators called WINPOWER DE. They were designed to be a simple power source for contractors who work in industrial environments. We selected these WINCO generators from the DE line.


The 23kw WINCO diesel generator is in the Tier IV Final market and has in-demand features like a powerful and efficient 4-cylinder 1,800 RPM Izuzu engine and a DSE7310 controller. It offers contractors the freedom to control the generator remotely and enables them to monitor its operation with its user-friendly interface constantly. It also provides many other conveniences, such as an alternator that can generate clean power in industrial settings.


This is another Tier IV Final Market WINCO generator that uses the DSE7310 controller. It is equipped with an FPT F5 series engine, which is larger than the typical T4F engine. WINCO chose this because its experts believe that a larger engine is essential for long life and the ability to respond quickly to load changes.

This allows contractors to stay on task and not experience delays that could push them behind schedule. Other intelligent features include automatic voltage regulation and controls to ensure the generator runs smoothly and automatically shuts off if there is a problem.


While WINCO generators are well respected, they are not the only option available. The international brand DEUTZ is among the leading manufacturers of innovative drive systems. It is also one of the oldest engine manufacturers in the world since it was founded in 1864. DEUTZ counts diesel applications as one of its 'core competencies.' So its diesel generators are built to last. The TD2.9 is available in 40kw and 45kw and is powered by a powerful Deutz diesel engine. It is equipped with powerful, modern machinery such as the MECC ALTE ECP32 alternator and 120 ah battery.

Kohler Generators

Kohler is a big name in the residential world as well as in commercial construction. In 2020, the brand announced that its KD1250-4, KD2500-4, and KD3250-4 diesel industrial generators had been certified for Tier 4 EPA Final air quality standards (non-emergency applications). Each generator offers more power than the next, increasing in size and weight. Check with us to see which Kohler generators best meet your application needs.

Finance Your Future

Large engines that run on diesel are known for their high value. If you are looking for a high-quality diesel generator, you do not have to wait. We have excellent in-house financing options that allow you to divide the cost into manageable monthly payments. Whether you need to finance a new or used rig, a generator, or a new spray foam machine, we have payment plans available. For more information, check out our financing calculator.

Diesel Generators for Sale at Intech Equipment & Supply

Are you looking for top-of-the-line diesel generators? Contact us and speak to one of our experts about Kohler, Deutz, and WINCO generators.

About Kevin Malone
Kevin Malone is a leading expert in the spray foam insulation industry with 34 years of experience in spray foam fluid handling and a passion for innovation. He currently offers his extensive knowledge to Intech Equipment and Supply customers by supporting them in selecting quality spray foam equipment to optimize their business. Learn more about Kevin here.


Intech Equipment & Supply was founded in 1995, and has since grown to become the leader in spray foam equipment, mobile spray foam rigs, and parts supplier. With locations all across North America we are available when you need us most.