Best Dual Fuel Generator

Best Dual Fuel Generator of 2021: Complete Reviews with Comparisons

If you need a generator that can handle more than one type of fuel, you might not know which one to choose. There are many options out there, but which one is the best generator for you?

This article will review some of the best dual fuel generators on the market - which work with both gas and propane fuel - to get you started in finding the one that’s right for you.

Best Portable Dual Fuel Generator
Westinghouse WGen9500DF Dual Fuel Portable Generator Westinghouse WGen9500DF Dual Fuel Portable Generator
  • Best in its class dual-fuel portable generator that operates either off gasoline or propane for added convenience.

  • Powerful enough to power a 3-4 bedroom home for non-essential and essential appliances.

  • Equipped with Westinghouse's robust 4-Stroke 457cc OHV Engine featuring a highly durable cast iron sleeve.

  • Fitted with push-button electric start which makes starting this generator a breeze with an automatic transfer switch

Comparison Chart






Best Overall


Westinghouse WGen7500DF Dual Fuel Generator


Runner Up


DuroStar DS12000EH Dual Fuel Generator


Premium Choice


Ford 11,050W Portable Dual Fuel Generator


Great Value


Champion 3800-Watt Dual Fuel Generator 


Bargin Budget


Sportsman GEN4000DF Dual Fuel Generator


Best Dual Fuel Generators Reviews

1. Westinghouse WGen7500DF Dual Fuel Portable Generator

Compared to the two previous generator models, this dual fuel generator comes at about the halfway mark in terms of the power it produces. This unit is durable, it’s long-lasting, and it’s got some pretty nifty features.


This is, of course, a dual fuel generator, and it can produce about 7,500 watts when using gasoline and 6,750 watts when using propane. This is more than enough juice to simultaneously power various appliances like air conditioning, refrigerators, and more. What’s quite impressive is that the 6.6-gallon fuel tank can provide up to 16 hours of runtime.

To make sure that you can start the Westinghouse WGen7500DF Dual Fuel Portable Generator without issue, it comes with a remote key fob. You can use the fob to start this unit from over 100 yards away.

The Westinghouse WGen7500DF Dual Fuel Portable Generator is very durable, as it comes with a 420cc 4-stroke OHV air-cooled Westinghouse engine, a very high-quality engine, especially considering the price. Moreover, this is also a low-maintenance unit.

In terms of outlets, this particular generator comes with dual GFCI 5-20R 120V household Duplex outlets and a single L14-30R 120/240V 30A twist-lock outlet. Although this generator weighs close to 200 pounds, it comes with wheels and a durable frame so you can push or pull it.


  • Plenty of power
  • Ideal to power various items at the same time
  • Wheels for portability
  • Very high quality and durable design
  • Long runtime on a single tank
  • Dual fuel capability


  • Quite heavy
  • Could use a couple more outlets

2. DuroStar DS12000EH Portable Dual Fuel Generator

If you are looking for a big generator with a lot of power, the DuroStar DS12000EH Dual Fuel Generator is a prime choice.


As we said above, this is a true powerhouse, as it comes with 12,000 watts of peak power and 9,500 watts of running power. Thanks to the DuroStar 18 HP 457cc OHV engine, this unit can power pretty much anything.

To help you plug in all of your appliances and tools, this unit features two 120V household outlets, one 120V 30A twist-lock outlet, one 120/240V 30A twist-lock outlet, and one 120/240V 50A heavy duty outlet, along with DC charging posts as well.

The DuroStar DS12000EH Dual Fuel Generator can use both gas and propane, and with an 8.3-gallon fuel tank capacity, you can use this generator for nearly a whole day straight without having to refill the tank.

Something you might like is that this generator is both CARB and EPA compliant, so although it does produce emissions, it’s about as good as it’s going to get in terms of eco-friendliness. The fact that this generator comes with a low oil auto shut-off feature is something you might appreciate, not to mention that it’s really easy to start.


  • Good amount of power
  • Many outlets
  • Large fuel capacity – long runtime
  • Gas/propane
  • EPA/CARB certified
  • Easy start
  • Low oil auto shut-off


  • Doesn’t do well in cold conditions

3. Ford 11,050W Portable Dual Fuel Generator

Here we have a high-quality dual fuel generator that can put out a whole lot of power, plus it comes with some neat features.


As implied by its name, this particular generator puts out up to 11,500 watts of energy, which should be more than enough to simultaneously power various appliances, such as televisions, refrigerators, AC units, and more.

This generator is a bit large and heavy, but it also comes with large never-flat wheels and a pulling handle to ensure maximum portability.

You may also appreciate the electric push start, so you don’t have to spend forever trying to get it running. Simply push the button, and it turns on, just like that.

Of course, one of the best features of the Ford 11,050W Dual Fuel Portable Generator is that it can use both gasoline and liquid propane to generate electricity. It also has a feature that allows you to seamlessly switch between fuel sources.

This unit features a 6.6-gallon fuel tank and can run for up to 10 hours on 50% load gas. The Ford 11,050W Dual Fuel Portable Generator features 4 x 120V outlets, a 120v AC 30A twist-lock outlet, and a 120/240V AC 50A RV outlet in terms of outlets.


  • Gas and propane
  • Portable
  • Electric start
  • Seamless fuel mode switch
  • Long runtime on a single tank
  • Super durable


  • Heavy 
  • Extremely loud

4. Champion 3800-Watt Portable Dual Fuel Generator 

This is a smaller, more portable, more affordable, yet less powerful dual fuel generator than the one reviewed above. It’s a good option in terms of portability and convenience.


What is nice about the Champion 3800-Watt Portable Generator is that it is not overly large or heavy, plus it comes with large wheels and handles for easy portability. It’s the kind of generator that you can use at home, at work, or on the campsite as well. This particular unit is designed as “RV ready.”

In terms of fuel usage, this unit can handle both gas and propane, and it comes with a safety fuel selector switch included to allow you to switch between fuel sources without interruption.

In terms of the gas tank, it can hold 3.9 gallons of gas, and on a full tank, you will get roughly 9 hours of runtime out of it. Keep in mind that it will run for about 10.5 hours on a full tank of propane; this unit can hold 0.6 quarts of oil, which is included, and it also comes with a low oil indicator and auto shut-off for low oil.

This is a four-stroke, single-cylinder, air-cooled motor that can put out up to 3,800 watts. No, the wattage is not huge, but still enough to power a few appliances simultaneously. To make life easier, the Champion 3800-Watt Portable Generator also comes with an electric start feature - just push the button, and it turns on.


  • Ideal for basic use
  • Works great for a couple of appliances
  • Electric start
  • Oil is included + low oil shut-off 
  • Propane + Gas 
  • Long runtime on a single tank (considering the size)


  • Very loud
  • Needs some time to warm up

5. Sportsman GEN4000DF Portable Dual Fuel Generator

If you need a smaller and more affordable generator to power a couple of things when the need arises, the Sportsman GEN4000DF Portable Generator is definitely a good option.


This is a good option if you need a generator to power two or three things simultaneously. It can be used for compressors, AC units, refrigerators, TVs, and similar times. It has 3,500 watts of power.

What is nice about the Sportsman GEN4000DF Portable Generator is that it’s not all that large or heavy, which helps with portability. It’s a good generator to stick in the truck or RV and take with you on the go. That said, unlike the other models we have looked at, it doesn’t have wheels, which is a bit of a drawback, although not a deal-breaker.

If you are using a standard 20 liter tank of propane in terms of fuel capacity, it will run for about 12 hours, and just slightly less on a full tank of gas. What does need to be mentioned is that this unit is loud.

The Sportsman GEN4000DF Portable Generator comes with a 120V AC RV outlet, 4 regular 120V AC outlets, and a DC battery charger outlet in terms of outlets. It might not be the No. 1 most durable generator on the market, but for the price, there’s nothing to complain about.


  • Lightweight and portable
  • Good for basic use
  • Lots of outlets
  • Decent fuel capacity/runtime
  • Affordable


  • No wheels

Benefits of a Dual Fuel Generator

Still not convinced that a dual fuel generator would make a good purchase for you? Read on for a few of the benefits you will find when using one.


A dual fuel generator is an economical choice. It allows you to save money because you won't have to solely depend on gasoline as your only fuel source. You can also take advantage of propane as your alternative fuel source. Propane is less expensive than gasoline, so the savings will quickly add up. It is also a very fuel-efficient generator option to pick.

Easy to Use

Some shy away from a dual fuel generator because they think they are difficult to use. However, this is just not the case. It is sometimes considered even easier to operate than other more conventional generator models.

Many have a push to start or remote start, so you don't have to crank the engine. You can also easily switch between fuel sources with just a simple touch of a button, switch, or lever, depending on the model you have purchased.

Some also come with wheel kits, making it easy to maneuver, and tool kits and intelligent gauges you can use.

Offers Flexibility

If you find yourself in the middle of an emergency, then a dual fuel generator offers you the flexibility you may need. You won't have to worry about running out of gas to fuel your generator, and you can easily switch between fuel sources very quickly and easily. So, if you have an interrupted gas connection due to a disaster, you can switch to the fuel source you need.

Little to No Maintenance

Propane is a clean-burning gas that can help reduce the amount of maintenance your generator needs. There will be no buildup that can make its way into the generator's components and cause damage.

You can also save space because of the fuel storage, and these units can withstand a fair amount of wear and tear.

A More Portable Option

Another big reason to choose a dual fuel generator is that it is also a portable option, depending on the size you choose. Many have foldable handles and never-flat tires that make it easy to maneuver.

Best Dual Fuel Generator FAQ.

Still have questions when it comes to finding the best dual fuel generator? Read on for some more valuable information.

What Are the Major Benefits of a Dual Fuel Generator?

Some of the major benefits of the dual fuel generator that we have already covered include fuel efficiency, flexibility, portability, ease of use, and minimal maintenance.

How Do You Use a Dual Fuel Generator?

A dual fuel generator uses two different types of fuel. These two fuel types are diesel fuel and natural gas. You can switch between fuel sources automatically based on what is most efficient for you to use at the time. Usually, this switch can be done with a simple button, lever, or handle.

Does Generac Make a Dual Fuel Portable Generator?

Yes. Generac makes a dual fuel portable generator that runs on diesel fuel and natural gas. It starts on diesel fuel, and then the natural gas is added until it begins running on natural gas primarily. It offers more dual fuel reliability.

What Is the Quietest Dual Fuel Generator?

Champion makes one of the quietest dual fuel generators currently available. It is the Champion 3400-watt RV ready portable dual fuel inverter generator.

How Long Will a Dual Fuel Generator Run on Propane Fuel?

A propane tank for a generator is between 500 and 1000 gallons. A propane tank powered generator can realistically burn about 2-3 gallons of propane fuel per hour. A 500-gallon tank can power a home continuously for up to a week.


The bottom line is that if you need a good generator that can run on both gas and propane, you should strongly consider any of the above products.

Just remember to look for how many watts you need to power your appliances and equipment.

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