Top 10 Best Diesel Generators Of 2023: A Comprehensive Guide


As we enter 2023, the search for reliable and efficient power sources continues to be a priority for many households and businesses. In this scenario, diesel generators have proven to be an increasingly popular choice due to their superior fuel efficiency, longevity, and performance compared to their gasoline counterparts.

With an abundance of options on the market, making a well-informed decision can feel overwhelming. This is where our comprehensive guide comes in! Read on as we navigate through the top 10 best diesel generators of 2023 and equip you with valuable insights that will empower you to make the perfect choice for your unique needs.

Key Takeaways

  • When choosing a diesel generator, consider factors like power outputfuel efficiencynoise levelportability and durability.
  • The Generac 6864 XD5000E is one of the best diesel generators on the market due to its durable build quality and reliable performance with clean energy output.
  • The DuroStar DS7000Q offers a powerful punch with up to 6,000 watts of surge power while still remaining portable and easy to maneuver with an electric start feature.
  • There are many high-quality options available for diesel generators in 2023 that cater to various power needs – prioritize your specific requirements when making your selection.
Best Diesel Generators

How To Choose The Best Diesel Generator

Consider the power output, fuel efficiency, noise level, portability, durability and reliability when choosing the best diesel generator for your needs.

Power Output

Understanding the power output of a diesel generator is crucial when selecting the best option for your needs.

For example, if you’re looking for a generator capable of powering essential appliances during an outage or providing stable energy off-grid, you’ll want to ensure that its power output matches or exceeds your total wattage requirements.

It’s important to consider not only what devices will be connected simultaneously but also their individual starting and running demands. Make a list of all appliances you need to support and add up their combined wattage, taking into account any possible future additions too.

Fuel Efficiency

Fuel efficiency is a crucial factor to consider when investing in a top-notch diesel generator. As a potential customer, you’ll want the most bang for your buck by choosing a generator that consumes fuel as efficiently as possible.

For example, the Generac 6864 XD5000E offers an impressive runtime of up to 32 hours at half load on its 12-gallon tank, making it one of the most efficient options available today.

Other high-end models like Westinghouse WGen7500DF Portable Generator and Champion Power Equipment 10000-Watt Portable Generator also boast remarkable fuel consumption rates.

Noise Level

A critical aspect to consider when you’re in the market for a diesel generator is the noise level it produces. Diesel generators can be quite loud, which may pose a problem if you live in a residential area or are concerned about environmental impact.

Noise levels are measured in decibels (dB), with lower numbers indicating quieter operation.

Manufacturers have started to integrate noise-canceling parts and measures into their design to reduce unpleasant sound emissions. One such generator that has successfully managed low total harmonic distortion is the Generac 6864 XD5000E, which not only offers sufficient power output but also caters well to domestic use due to its relatively quiet performance.

Investing in a diesel generator with reduced noise levels will ensure harmony among neighbors and minimize any disturbances caused by prolonged operation during outages or other emergency situations.


One of the most important considerations when choosing a diesel generator is its portability. Portability can affect where and how you use your generator, especially if it needs to be moved regularly.

Some generators come with wheels or handles that make them easier to move around, while others are designed to be stationary. For example, the Kubota GL7000 Lowboy II has a compact design and weighs only 366 pounds, making it easy to transport from one location to another.

When considering portability, also consider factors such as size and weight. The Westinghouse WGen7500DF Portable Generator has a compact design and comes with wheels for easy handling despite its hefty battle tank appearance; weighing 218 pounds though may need two people depending on ground level! Also keep in mind any additional attachments or accessories such as wheel kits or handles that may impact the overall portability of your generator choice.

Durability And Reliability

As someone who’s looking to invest in a diesel generator, it’s essential to consider durability and reliability. These generators are built to last, with stronger engines that can handle heat better than their gasoline counterparts.

One excellent example of a reliable diesel generator is the Generac 6864 XD5000E. It has an OHVI engine that can withstand extended use without sacrificing performance or efficiency.

Additionally, the Cummins Onan Quiet QD10000 features computer-controlled variable velocity and self-analysis capabilities, ensuring top-of-the-line reliability and durability when you need it most.

Generac 6864 XD5000E

The Generac 6864 XD5000E is a top-rated diesel generator that features a fully welded 1.25” steel frame, making it one of the most durable and reliable options on the market.

Features & Description (Generac 6864 XD5000E)

The Generac 6864 XD5000E is a top-performing diesel generator that stands out for its impressive features and high-quality build. It boasts a fully welded 1.25” steel structure, making it durable and long-lasting.

Additionally, the Generac 6864 XD5000E offers reliable power output with only 5% total harmonic distortion, making it suitable for residential use as well as industrial applications like construction sites or outdoor events.

One downside is that the battery used in the electric start feature is not included with the purchase of the product – you will have to buy one separately if you need this function.

Pros & Cons (Generac 6864 XD5000E)

As one of the top diesel generators on the market, the Generac 6864 XD5000E has a lot to offer. Some key pros include its fully welded 1.25” steel structure that makes it incredibly durable and reliable for long-term use.

Its portable design also means you can bring it with you wherever you need power, making it a great choice for camping trips or outdoor events.

However, there are some cons to consider as well. The battery required for electric start is not included in the package and must be ordered separately, which may result in an additional cost.

It’s also worth noting that compared to gas-powered generators with similar output levels, the price point of the Generac 6864 XD5000E is higher due to its diesel fuel source.

DuroStar DS7000Q

The DuroStar DS7000Q is a powerful diesel generator that provides reliable power output and features like electric start, low oil shutdown, and quiet operation.

Features & Description (DuroStar DS7000Q)

The DuroStar DS7000Q is a reliable and efficient diesel generator that packs a powerful punch. With a surge power of 6,000 watts and running power of 5,500 watts, this generator can handle most household appliances and tools with ease.

What sets the DuroStar DS7000Q apart from other generators is its portability. Weighing in at just under 300 pounds, this generator features a wheel kit that allows for easy maneuverability across different terrains.

Additionally, the electric start feature makes starting up the generator simple and effortless.

Pros & Cons (DuroStar DS7000Q)

The DuroStar DS7000Q is a powerful and versatile diesel generator that can provide up to 6,000 watts of surge power and 5,500 watts of running power. Its wheel kit makes it easy to transport from one location to another, making it ideal for outdoor events or job sites.

With a noise level of only 72 decibels, it’s also relatively quiet compared to other diesel generators in its class.

Overall, the DuroStar DS7000Q is an excellent choice for those seeking convenience and portability without sacrificing power output.

Gillette Generators GPED-65EK Gen-Pro

The Gillette Generators GPED-65EK Gen-Pro boasts a Kohler KD440 engine, 12-gallon fuel tank, and one-touch electric start for easy operation.

Features & Description (Gillette Generators GPED-65EK Gen-Pro)

The Gillette Generators GPED-65EK Gen-Pro is a compact and powerful diesel generator designed for industrial, commercial, and residential applications. With a surge power of 6,500 watts and a running power of 5,000 watts, this generator can easily power up your home appliances or tools on the go.

Designed with durability in mind, the Gillette Generators GPED-65EK Gen-Pro has high-quality components that ensure reliable operation even during extreme weather conditions.

The control panel includes various outlets such as twist-lock plugs for heavy-duty equipment and circuit breaker protection to prevent electrical overload. This generator is also EPA/CARB compliant which means it’s safe and legal to use in any US state without worrying about emissions regulations.

Pros & Cons (Gillette Generators GPED-65EK Gen-Pro)

Let’s talk about the Gillette Generators GPED-65EK Gen-Pro. This generator is definitely a powerhouse, with running power of 6,500 watts and surge power of 8,000 watts.

Its large fuel tank size of 12 gallons means that it can run for up to 32 hours at half load – perfect for long power outages during natural disasters or emergencies.

One of the standout features is its sturdy frame that can protect against wear and tear in industrial applications. Additionally, this generator provides clean power with very low harmonic distortion – less than just 6%.

However, one thing to keep in mind when considering the Gillette GEN-PRO GPED-65EK is its weight – at close to 400 pounds it’s not as easily portable as some other options listed here.

Pulsar PG7000D

The Pulsar PG7000D generator is a reliable option for those in need of portable power with its 5.2-gallon fuel tank, electric start, and automatic voltage regulator.

Features & Description (Pulsar PG7000D)

The Pulsar PG7000D is a reliable and efficient diesel generator that boasts an impressive power output of 7,000 surge watts and 5,500 rated watts. This portable generator is perfect for home backups or industrial applications, making it a versatile addition to any household or work site.

One standout feature of the Pulsar PG7000D is its noise reduction capabilities. Thanks to special insulation, housing, and airflow measures, this generator operates quieter than most other diesel generators on the market.

It also offers a total of five outlets for convenient powering options.

Pros & Cons (Pulsar PG7000D)

If you’re in the market for a diesel generator that is both powerful and quiet, the Pulsar PG7000D may be just what you need. This generator provides 7,000 surge watts and 5,500 rated watts with its 10-horsepower diesel engine.

The Pulsar generator can run for up to 12 hours at half-load on its four-gallon fuel tank.

However, it’s important to note that this generator is not CARB compliant and may have quality control or delivery damage issues. Additionally, customers should be aware of the noise level when running at full capacity as it may still be too loud for some environments.

Cummins Onan Quiet Series Diesel RV Generator

The Cummins Onan Quiet Series Diesel RV Generator is a reliable option designed for recreational vehicles, with an impressive surge power of 10,000 watts and 8,000 watts of running energy.

Features & Description (Cummins Onan Quiet Series Diesel RV Generator)

The Cummins Onan Quiet Series Diesel RV Generator is the ideal solution for powering your RV on long trips. With a surge power of up to 10,000 watts and running energy of 8000 watts, this generator can power up to 3 AC units at once.

This diesel generator has noise-canceling features such as a muffler, casing and enclosed cooling system which brings the rated noise level down to only 70 decibels – meeting US National Park (UNP) sound requirements.

Additionally, it complies with EPA and CARB regulations making it an environmentally friendly option.

Pros & Cons (Cummins Onan Quiet Series Diesel RV Generator)

The Cummins Onan Quiet Series Diesel RV Generator is an excellent choice for RV enthusiasts who want high-quality power without the noise and emissions of traditional gasoline generators.

The QD10000 produces 10,000 watts of clean AC power capable of running three air conditioning units in your vehicle or home off a single generator with only 70 decibels rated noise level.

This diesel-powered generator presents itself as one of the quietest in its class.

One drawback to this generator is its cost; it’s quite expensive compared to some other models on the market but worth every penny for those who value reliability and quality.

Additionally, while diesel generators are generally more fuel-efficient than gasoline engines, fuel costs tend to be higher for diesel fuel over propane and gas alternatives.

However, with variable speed technology that adjusts engine rpm based on demand results in less usage, which can save money in the long run even though there might be additional upfront costs (especially if you plan to use it consistently).

Westinghouse WGen7500DF Portable Generator

The Westinghouse WGen7500DF Portable Generator features a high capacity fuel tank, dual-fuel capability, and an electric start.

Features & Description (Westinghouse WGen7500DF Portable Generator)

The Westinghouse WGen7500DF Portable Generator is a reliable and efficient dual-fuel generator that can run on both gasoline and propane, making it ideal for outdoor activities or as a backup power source during emergencies.

With its 4-stroke single-cylinder direct-injection diesel engine, this generator delivers 7,500 peak watts and 6,600 rated watts with gasoline, or 6,750 peak watts and 6,000 rated watts with propane.

The control panel features two GFCI 120V household duplex outlets, one transfer switch ready twist-lock outlet and one RV Ready outlet.

Additionally, the LED data center displays vital information such as fuel level assessment remaining runtime voltage output along with power production to help keep track of usage time effectively.

It also comes with an electric start in addition to remote starting capability so you can get it started quickly from afar- giving you peace of mind knowing your home or campsite will stay powered when you need it most.

Pros & Cons (Westinghouse WGen7500DF Portable Generator)

The Westinghouse WGen7500DF Portable Generator is a powerful and reliable option for those in need of backup power. Some pros of this generator include its large fuel tank capacity, which allows for up to 16 hours of use at 50% load, as well as its multiple outlets including four 120V household outlets and one RV outlet.

On the downside, some customers have reported that the noise level is higher than expected, so it may not be ideal for quiet environments or camping trips where you don’t want to disturb your surroundings.

Additionally, while the generator has never-flat wheels for easy transportation, some customers have mentioned that they can be difficult to maneuver over rough terrain.

Kubota GL7000 Lowboy II

The Kubota GL7000 Lowboy II features a 7.4-gallon fuel tank, making it a great option for those who need extended run times.

Features & Description (Kubota GL7000 Lowboy II)

The Kubota GL7000 Lowboy II is a high-performance portable diesel generator suitable for industrial, commercial, and residential use. It features multiple convenience receptacles, including GFCI-rated duplex NEMA 5-20R, twist-lock NEMA L5-30R, NEMA L6-30R, and NEMA L14-30R.

The generator has automatic shut-down features to protect the engine from damage caused by low oil pressure or excessive water temperature sensors.

This top-performing diesel generator comes with limited manufacturer warranty of 2 years/2000 hours of operation and is of Japanese origin ensuring reliability over time while saving on maintenance costs in comparison with gasoline generators.

Pros & Cons (Kubota GL7000 Lowboy II)

When it comes to portable power solutions, the Kubota GL7000 Lowboy II stands out as a top contender. One of its biggest pros is its compact design, measuring only 42 x 24.3 x 27.5 inches while still generating up to 6.8 kW of power output at peak performance.

However, one potential con for this generator is that its noise level is slightly higher than some other models at 72 decibels. Despite this, diesel generators like Kubota’s are efficient and durable due to their denser fuel nature producing more energy from less fuel volume compared with gasoline engines.

Champion Power Equipment 10000-Watt Portable Generator

The Champion Power Equipment 10000-Watt Portable Generator boasts a reliable engine and powerful surge capacity, making it an excellent option for home backup or outdoor events.

Features & Description (Champion Power Equipment 10000-Watt Portable Generator)

The Champion Power Equipment 10000-Watt Portable Generator is a reliable and efficient generator that can provide power backup in case of emergencies. It features a powerful 459cc engine, which can produce surges of up to 12,500 watts for an extended period.

Additionally, the Champion Power Equipment 10000-Watt Portable Generator also includes an electric start for easy operation. With its high fuel efficiency and runtime of up to 10 hours on a full tank of gas at half load, it’s perfect for those who need constant power supply without worrying about refueling frequently.

Pros & Cons (Champion Power Equipment 10000-Watt Portable Generator)

The Champion Power Equipment 10000-Watt Portable Generator is a powerful and durable generator that offers a number of advantages. With its electric start and 10-gallon fuel tank, this generator provides up to 10 hours of runtime at half load, making it ideal for extended power outages or outdoor events.

On the downside, some users have reported issues with the battery and electric start. Additionally, while it is CARB compliant, this generator can be noisy when running at full capacity.

AMICO Power AHW6000LE Diesel Welder And Generator

The AMICO Power AHW6000LE Diesel Welder and Generator is a multifunctional device that combines welding and power generation capabilities for industrial applications.

Features & Description (AMICO Power AHW6000LE Diesel Welder And Generator)

The AMICO Power AHW6000LE Diesel Welder and Generator is a versatile power solution that provides both welding and electrical output. With a surge power output of 6000 watts and running power of 6500 watts, this industrial generator can handle various tools and appliances.

This diesel-powered unit has an electric start system for easy operation, making it suitable for high-demanding projects like construction or repair sites where quick startup is vital.

It’s equipped with low oil pressure shutdown as well as automatic voltage regulator (AVR) for overload protection, ensuring durability and reliability in its performance.

However, one thing to note is that the welding leads are not included in the package but must be purchased separately.

Pros & Cons (AMICO Power AHW6000LE Diesel Welder And Generator)

The AMICO Power AHW6000LE Diesel Welder and Generator is a top pick for those who need both welding capabilities and reliable power generation. The generator offers 6,000 peak watts and 5,500 running watts to handle most small-to-medium sized jobs with ease.

One of the great pros of this generator is that it comes equipped with a wheel kit and handles to make transportation much easier. However, keep in mind that the AMICO AHW6000LE weighs over 350 pounds, so it’s not easily portable on your own.

Diesel Generator FAQs

Have questions about diesel generators? Our FAQs section covers important topics such as fuel consumption, oil type and viscosity, emissions compliance, and more. Don’t miss out on essential information that can help you make an informed decision when purchasing your next diesel generator.

What Is The Smallest Diesel Generator?

If you’re looking for a small diesel generator, the Durostar DS7000Q is one to consider. With a 3.83-gallon fuel tank, this compact generator can run up to eight hours on half-load and only weighs around 200 pounds.

Its noise-reduction measures make it quiet enough for use in residential areas without disturbing your neighbors. Another option is the Generac XD5000E with a larger 12-gallon fuel tank that allows for over 32 hours of half-load use.

How Does Diesel Compare To Propane Or Gasoline-powered Portable Generators?

Diesel generators are more fuel-efficient than propane or gasoline-powered portable generators. They offer reduced fuel costs, which can be most significant in industrial settings where the generator is running for long periods continuously.

Diesel engines also offer more torque at low revs and better adapt to load changes, making them an excellent choice for backup power and industrial applications that require consistent output even under varying conditions.

Additionally, diesel engines have a longer lifespan and require less maintenance than their gasoline counterparts, meaning they will last longer with fewer repairs needed over time.

Example: Suppose you live off-grid in remote locations where access to electricity is limited.

Which Oil To Use In A Diesel Generator?

Using the right type of oil is paramount for ensuring optimal performance and longevity in a diesel generator. It’s important to check the manufacturer’s specifications, as they may recommend specific types of oil based on the engine type and operating temperature.

Synthetic oil is generally a solid option for diesel generators due to its ability to withstand high temperatures and resist breakdown over time. Regular maintenance and oil changes are essential for keeping your generator clean and running smoothly, which includes using an oil filter to remove contaminants from the engine.

Does A Diesel Generator Produce AC Or DC?

A diesel generator typically produces AC (alternating current) electricity, which is the preferred type for most applications. This means that the electricity produced by a diesel generator changes direction periodically, allowing it to be easily converted to DC (direct current) if needed.

Having AC output allows for easier transmission of electricity over longer distances and compatibility with a wider range of appliances and devices.

However, it’s worth noting that some specialized equipment or industrial applications may require DC power instead.


In conclusion, choosing the best diesel generator can be overwhelming with so many options available in the market. However, our guide to the top 10 best diesel generators of 2023 provides a comprehensive overview of each product’s features, pros and cons, and key specifications.

From portable designs to high-power output models suitable for industrial applications or RV use, there is a wide selection of diesel generators to choose from.

Whether you prioritize fuel efficiencynoise reduction, or durability and reliability – these top picks have got you covered.


1. What factors should I consider when selecting a diesel generator?

When choosing a diesel generator, look for factors such as power output, fuel efficiency, durability of the engine and components, ease of maintenance and repair, noise level and safety features to ensure you select the best choice for your specific needs.

2. How long can a diesel generator run continuously?

This depends on several variables including the size of the tank & how much fuel it holds, as well as how often it is used/commissioned during an extended period of operation. Generally speaking – most modern generators are designed to run non-stop between 8-12 hours before needing additional fuel or oil changes/other routine services.

3. Can I use my diesel generator indoors?

Diesel generators should never be used inside enclosed spaces due to their exhaust that emits toxic fumes containing carbon monoxide which poses significant health risks if inhaled by humans or other living creatures within proximity.

4. How do I properly maintain my diesel generator?

To keep your diesel generator operating smoothly over time requires following proper maintenance procedures like regularly changing its oil filters & air filters along with keeping track of its coolant levels at set intervals while using regular inspections conducted by professionals specializing in this field who have expertise troubleshooting problems related specifically towards these machines.Taking care of these important steps will help prevent breakdowns from occurring so that you can rely upon your machine when needed most — especially during critical times– such as times extreme weather events (i.e., hurricanes) in particular areas around North America where blackouts may occur more frequently depending upon proximity/vulnerability encountered within specific regions facing climate challenges beyond our control

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I'm Wayne. I have worked in the construction industry for many decades and have had the opportunity to work with various equipment and portable generators. I've also written extensively about both subjects. I spend time with my family when I'm not writing or working in construction.

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