3 Best Portable Diesel Generators [Buyers Guide 2022]

Last Updated on May 2022

If your work or personal assignments require a constant supply of power, a diesel generator is a great choice.  What’s even better is that you can get yourself a portable diesel generator if your work requires you to move frequently from one location to the next. In this review, we highlight the best compact diesel generators that will make your job a breeze.

In case you’re looking for a portable diesel generator, you’ll experience an assortment of sizes, costs, and execution levels. While you may need all the benefits of diesel fuel, you may not be altogether sure which item will work best for your requirements.

A diesel generator is an excellent choice for circumstances that need a consistent power supply, that is, in situations where systems must work uninterruptedly. Subsequently, these generators are generally utilized in occasions, hypermarkets, construction, medical clinics, and in different settings where energy is imperative.

3 Best Portable Diesel Generators Reviewed

Generac Diesel Portable Generator


  • Fully welded 1 1/4″ steel frame
  • Yanmar LW Series 435cc air-cooled direct injection, industrial-grade diesel engine
  • Diesel power requires less maintenance, is more efficient, and provides a long life

This Generac comes out as the best portable diesel generator for your money.  Even though it runs noisily, you’ll get a lot of intensity with 5,000 running watts to run a large portion of the equipment in your home or automotive trailer.

The  Generac is built with a fully welded 1¼-inch steel outline. This generator is, however, quite heavy. At 254 pounds, expect to spend more energy moving than if you purchased a lighter portable diesel generator. This weighty generator consolidates a coordinated lifting eye into its design, or you’ll have to buy a wheel unit for more effortless transportability.

Besides, this potable diesel generator has a Yanmar LW Series 435cc mechanical evaluation diesel motor with air-cooled direct injection, eco-friendly inert control, and True Power technology for spotless, smooth power yield. At a half load, this generator has a long runtime of 32.4 hours using a 12-gallon fuel tank.

Adding to your costs, you’ll have to buy a grass tractor 330 CCA battery to work the single-contact electric starter and the fuel cutoff system. We found that the electric start-up functions admirably, yet the pull start isn’t reliable and can be hard to use.


  • Adequate energy yield
  • Air-cooled direct injection
  • Eco-friendly inert control
  • Genuine Power technology
  • Long runtime
  • Coordinated lifting eye for transport
  • Heavy-duty construction
  • Single-touch electric start


  • Noisy
  • Substantial at 254 pounds
  • Wheel pack bought independently
  • Battery excluded
  • Pull start problems

POWER PRODUCTS Sigma Silent Diesel Generator


  • 8 hours at 50% load.
  • Noise level: 68 db at 21 feet

This diesel generator comes at a lower cost than different models on our rundown; you won’t have to compromise on power or noise-free operation with the Sigma silent generator. This power source delivers up to 7,000 watts with a 5,500 running wattage, which implies it can run most of the machines that you use.

The Sigma’s encased edge decreases the noise levels to an agreeable 68 decibels.

This present generator’s four-cycle air-cooled diesel motor uses direct injection for better eco-friendliness. It additionally accompanies a battery-controlled starter and a power back-up starter. Once active, the Sigma has a running time of eight hours at a half load on a full fuel tank with a limit of 3.96 gallons.

A fuel gauge is incorporated for your benefit, just as a low-oil alert, an AC electrical switch, DC yield 12V/8.3, and an AC attachment. While a voltmeter is incorporated, this generator doesn’t have a part of controlling variable voltage levels, which could damage some sensitive gadgets.


  • Quite affordable
  • Amazing wattage yield
  • Extended running time
  • Tranquil activity
  • Voltmeter
  • Direct injection for optimal fuel use
  • Low-oil alert
  • Easy to transport, thanks to the wheels and handle attached to the generator


  • No voltage guideline

Onan Quiet Diesel Generator


  • Powered 8000 watt RV generator
  •  Self-diagnostic capabilities
  • USDA Approved spark arrestor

On account of PC-controlled variable speed operation, sound-control housing, and the intake silencer, the Onan’s 3-chamber diesel motor runs at a noise level way below National Park Service sound level requirements. Its advanced voltage guideline system gives perfect, top-notch sine wave electrical yield.

With the capacity to run two 15,000 BTU air conditioning systems and other machines, plus an extraordinarily quiet operation, there is little doubt that the Onan generator is our excellent option. Remember that this top-level execution 8,000-watt generator comes at a high cost.

Its different features incorporate a base air delta and outlet, a three-point and centered mounting framework, a USDA-endorsed sparkle arrestor, a central radiator, an air cleaner, and an upkeep-free electronic governor, and pure, open support focuses. It additionally has a waterproof connector for remote operation. This generator meets US EPA, and California discharges guidelines.

Although perfect for outdoors, you may run into trouble shipping this 420-pound generator, which doesn’t have wheels or other mobility options.


  • Hushed operation
  • Advanced voltage guideline for clean electrical yield
  • Premium execution and power yield
  • PC controlled variable speed activity
  • Vibration-lessening mounting system
  • USDA-endorsed sparkle arrestor
  • Rock-solid air cleaner
  • Simple support
  • Waterproof connector
  • EPA and California outflows measures


  • Costly
  • Massive at 420 pounds
  • No portability options

The Benefits and Drawbacks of Diesel Fuel for Portable Generators

You might be in the market for a diesel-energized portable generator since you realize that it has numerous advantages over gas-controlled models. In this area, we’ll talk about the benefits of going with a diesel-controlled generator and the potential downsides.

Probably the most significant factor for purchasing a diesel-energized item is the decreased upkeep. Over the life expectancy of your generator, you’ll set aside both cash and time with less maintenance gives that require consideration and assets.

Diesel-filled generators will generally last more and have more prominent eco-friendliness than their gas-controlled partners. They’re additionally safer to work with since diesel is less combustible and less dangerous.

Before you make a trial with a diesel-powered machine, make a point to double-check your financial design. Diesel generators are generally expensive items to purchase. The accessibility of diesel fuel and its fluctuating costs may turn into a bother and an expense.

Likewise, take a look at the decibel levels before you buy a diesel generator. While a few items exceed expectations at lessening the noise level, most diesel-energized generators work stronger than gas-controlled models.

Basics Tips before You Buy

With regards to portable diesel generators, there are few features and execution levels to consider before you make a buy. Comprehending what to search for and what to stay away from can assist you with picking the best item for your necessities.

Wattage yield should be among your top contemplations since any generator’s purpose is to control machines, gadgets, and potentially warming/cooling frameworks. Regardless of whether you’re managing a power blackout or welcoming your generator on an outdoor experience, you’ll need a generator that delivers up to 7,500 watts or more.

With that measure of wattage, you’ll have the option to control a fridge, PC, a few lights, cell phone charger, home security framework, 10K BTU powered air system, well siphon, sump siphon, and gas or propane heater. If you unplug one of the above devices, you could run a burner on an electric range or utilize the dishwasher.

When controlling delicate gadgets and technology, you’ll need to be aware of the voltage changes provided by your generator. Many top-of-the-line generators use a programmed voltage regulator to offer a protected, consistent, and clean power yield. With a voltage controller, you abstain from delivering harm to your apparatuses and gadgets.

As you consider which portable diesel generator to buy, search for a motor with direct fuel injection for improved effectiveness. Other supportive features incorporate a low-oil shutoff to spare genuine harm to your engine from happening and an electric starter for comfort.

Finally, if you intend to take your diesel generator on your next trip or experience, you should have the option to move it. All the generators reviewed weigh many pounds. Be sure the one you buy comes with built-in wheels or has a wheel unit that you can buy. Additionally, search for handles and other transportability alternatives to make moving your overwhelming generator conceivable.

Best Places to Purchase Portable Diesel Generators


There are several places to buy welding accessories online. However for a worry-free return policies, transparency in terms of product quality and customer service, and fast shipping, head over to Amazon.

When you browse on Amazon, you can see what previous buyer reviews on the product they bought, and find out everything spec wise on the items quality, protective features, and comfort. You don’t need to go out to compare prices or features.

If you have problems with purchasing from Amazon there cstomer service is excellent, you can also quickly and easily return them.


The Melton YDG5500W-6EI Yanmar Portable Diesel Generator earned our top pick for best by and sizeable portable diesel generator because of its simple support and energy proficient activity. It accompanies a fundamental programmed voltage controller, a motor that utilizes direct injection, and a low-oil shutoff and alert. The Melton has a fantastic long running time and works discreetly. Its con is that you’ll pay more for these ideal features, and without handles or wheels, convenience is constrained.

Our choice of the best worth goes to the Generac 6864 Diesel Powered Portable Generator. The Generac has adequate power yield at 5,000 running watts. It’s additionally eco-friendly, with air-cooled direct injection and inert control.

The Generac utilizes True Power technology and has a long expanded runtime and a single touch electric beginning.

Although at 254 pounds, it’s quite massive, it has a sturdy construction and a coordinated lifting eye for more comfortable transportation. Remember that you’ll require buying a wheel unit and battery independently. This generator is probably the most intense item we checked on, and know that you may experience pull-start troubles.

The Onan 8.0HDKAK-1046 Quiet Diesel Generator has the power and execution to be our top-notch choice. Indeed, even with an astonishing 8,000-watt power yield, this generator has a similarly incredible low noise level. The Onan offers advanced voltage guidelines for clean electrical return, PC controlled variable speed activity and a vibration-lessening mounting framework.

Extra features incorporate a USDA-affirmed sparkle arrestor, a heavy-duty air cleaner, and a waterproof connector. This generator is anything but difficult to keep up and meets US EPA and California emanations gauges. In any case, you will pay more for this current generator’s top-notch performance.

We trust that our in-depth reviews of the Best Portable Diesel Generators,  including the pros and cons of each of these portable diesel generators and the buyer’s guide, have helped you get familiar with portable diesel generators before you make a buy.

Putting resources into a portable diesel generator can be a great decision. It ensures you have a sufficient supply of power in your home during a blackout or to bring convenience to your next outdoor expedition.


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