Best Dual Fuel Generators 2021

Gone are the days when a couple of brands were the only ones calling the shots, and all you had to do was choose from a couple of generator set options. Today, you have to even know what mode, kind and capacity you would like to get.

Speaking of kinds, this is where the dual fuel generators come in. Having gained popularity over the last couple of years, they have established themselves as a strong alternative and competitor to the traditional generator sets.

The next time you are going out to get one of these cool engines, here are the top options to look at – and why. Before that, though…

What are Dual Fuel Generators, Really?

As the name implies, these are power generating sets with the ability to run on two different types of fuels. They have been specially engineered in a way that their engines can be powered by the alternate source of fuel in the case one is not available.

This model of operation is supported on the standing that both fuels do not mix in the course of operation. With that, you can always have two separate tanks holding different fuels, or one with the available fuel in case the other is suddenly not available.

So, they are not just a fad or the latest marketing gimmick in town. These are really functional units that have come to change the way we choose our generating sets.

Now that we have established what they are, and why you should totally get one, here are the best dual fuel generators on the market right now.

Best Dual Fuel Generators 2021

In choosing these units, we have combed through the extensive list of dual fuel generators out there to come up with only those that are:

  • Fuel efficient
  • Manage the mix of fuel well
  • Supply different output for different needs
  • Come from respected generator manufacturing companies and
  • Are highly durable, and have high-end features.

Let’s get right into it then, shall we?

Duromax XP10000EH Dual Fuel Generator

DuroMax XP10000EH Dual Fuel Portable Generator - 10000 Watt Gas or Propane Powered-Electric Start- Home Back Up & RV Ready, 50 State Approved


Are you looking for a generator that needs a lot of power? The 10,000 watts of energy that this Duromax XP10000EH is capable of might do the trick.

For all that power, one would expect that the unit groans, huffs and puffs when working. In fact, the opposite is the case.

You would think so too if you knew that only about 72 dBA of noise is always produced during operation.

If you have been looking for a generator that packs electric start functions out of the box, this is yet another one to look at. That is not to mention the obvious – the fact that the Duromax XP10000EH runs on both gasoline and propane.

Speaking of the fuels it runs on, we believe it does so quite efficiently too. Even though Duromax might not be known for great customer service, this unit still comes with a one-year warranty. If you can look past that, though, you would totally enjoy the versatility provided by the six outlets on the generator set.

Starting the unit is as easy as turning a key. However, this might fail when a battery is not in the machine, or dead. To cater for such situations, Duromax has installed a coil starter into the unit.
Of course, we would expect something that could generate that amount of energy to be heavy. A total weight of 256 pounds is no small deal, but solid wheels and handles will make you forget that during transport.

With all the power coming from a massive 4-stroke engine and the potential to clock up to 18 HP, this generator can power most homes and some industrial setups in the case of a power outage.


  • Comes with a huge engine that generates lots of power
  • Noise levels are surprisingly low
  • A total of six outlets makes the generator highly versatile
  • Unit is made of a sturdy and solid build
  • Easy two fuel selector switch


  • Surge protection is absent
  • Duromax is not known for stellar customer service

Champion 7500 Watt (with Electric Start)


Champion is one of the best generator manufacturers in the market, so it is no surprise that their unit will make this list.

This particular 7500-Watt generator has been designed with an engine that could be run on either of propane or gasoline. Featuring a plug-and-play design, they have made it so easy that installation requires no technical know-how.

One thing we love about this engine is that for all the energy it cranks out, the noise level is kept at only 74 dBA. This has accounted for increasing noise levels with increased use, and it is almost sure that you won’t be getting a deafening noise from the generator anytime soon.

With the ability to hold 1.2 quarts of oil, this section comes with a sensor which shuts down the generator whenever the oil level starts to drop. This way, the engine is prevented from knocking.
Going to the fuel tank, the Champion 7500-watt dual fuel generator will supply 8 hours of operation on a full gasoline tank and an additional 5.5 hours with propane at the helm of affairs. Lest we forget, the electric start is no ruse – and your battery gets charged while the generator is in operation.


  • Low noise level. 74 dBA rating can be compared to what you would get on a dishwasher
  • The generator is not only optimized to power all electric tools, but offer surge protection too
  • Comes with low-oil shut off sensor
  • Automatic start with the electric button
  • Lasts long on chosen fuel sources
  • Has a volt guard
  • Plug-and-play model requires little to no technical know how to get the generator going


  • Customer service might be an issue with this unit.

Read also: Best 7500 Watt Generators

Westinghouse WGen7500DF Dual Fuel Generator

Westinghouse Outdoor Power Equipment WGen7500DF Dual Fuel Portable Generator 7500 Rated & 9500 Peak Watts, Gas or Propane Powered, Electric Start, Transfer Switch Ready, CARB Compliant



Founded in the year 1886, Westinghouse has lasted this long in the market just because they know what they are doing. With their WGen7500DF, they have cemented that stand even further.
Looking at this unit, we are faced with a generator that is also powered by gasoline and propane. It takes that a notch further by offering the option of an electric start and a push button too – making it an ideal fit for anyone to operate.

Additionally, the Westinghouse WGen7500DF boasts an impressive 10 hours of operation when maintained on its fuel sources, cranking out as much as 7500 watts of energy in the least. Yes, that is the least – since the machine can manage up to 8550 watts when it is being run on the propane fuel tank.

Speaking of the tanks, this unit is built with a sturdy frame which has metal roll bars incorporated into them. These roll bars are arranged in such a way that they provide additional protection for the fuel tanks.

Likewise, they make it easy to lift the generator when transporting it from one place to the other is needed.

To cap it all off, the unit is protected by a voltage regulator. This is in addition to the low shut off oil sensor and a couple of other safety measures in place. Together, they ensure the engine is never overloaded to the point where it causes a fatal damage.


  • Digital hour meter on the unit helps in scheduling maintenance
  • Can crank up between 7500 – 8550 watts of energy during operation
  • Comes with everything you need in the box – manual, funnel, tool kit, etc.
  • A remote start is possible by a key fob
  • Lower fuel consumption due to the overhead valve technology
  • Fuel selector switch is easy to operate
  • Circuit protection and low-oil shutoff switch for better engine safety


  • Does not come with a battery
  • Engine oil doesn’t ship with the unit
  • The propane tank is not included in the pack

Why should you get one of these?

Besides the obvious reason of being able to use two different fuel sources to run one engine? Trust us, there is a lot more that these units do for you.

The first thing that makes most people shy away from these generator models is the cost price. When this is presented as an excuse, we cannot but cringe.

The reason is because the dual fuel units are actually cheaper – in the long run – when compared to the single fuel types. In fact, the difference between the units could be as less as $100.

Where that doesn’t count against the generators is in the operational efficiency. Now, you can run your generator on the most available and cheapest source of fuel without having to go get another unit.

It has also been established that these generator units are economical in the way they use their fuel. The efficient mix of fuels going into the engine allows it operate at maximum capacity and thus, give you the best output.

As if that is not enough, the way these sets switch from one fuel source to another is laudable.
At the start of operation, the generator has been programmed to automatically select a viable fuel source. Should that fail anytime, the dual fuel generator intelligently switches to the other fuel source.

All of these is carried out without a drop in the output, ensuring uninterrupted power supply. This not only makes them ideal for the homes, but industries and establishments such as hospitals where the production lines and the lives of people (respectively) are dependent on the smooth operation of machines – which in turn run on electricity.


There you have it. From the high-power generating sets to those that give off medium energy, those are the top dual fuel generators you should consider buying when next you go shopping.

Got yet another Best Dual Fuel Generator that didn’t make this list? Contact us and let us know. 

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