3 Best Dual Fuel Generators

This article will cover what are dual fuel generators, what separates them from conventional generators, and review the best dual fuel generators.


We will also look at their pros and cons to help you decide on the right dual fuel generator for your needs.


What is a Dual Fuel Generator?

A dual fuel generator is a multi fuel machine that produces electricity from gasoline or propane. 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.


Best Dual Fuel Generators 2022


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.

Champion 4250 Watt Dual Fuel Inverter Generator

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Do you need a powerful, high performance? If so, the Champion 4250 watt inverter generator is one of the best.

The manufacturers cut the noise level in half by integrating the Quiet Technology components in advanced inverters to help the generator operate quietly.

Still, it has an efficient mechanical design that reduces the overall footprint and weight by only 20%. 

You can efficiently operate this quiet generator on propane or gasoline with this model.

You can easily change fuels using the patented fuel selector dial. Besides the dual fuel ability, it has versatile outlets, making it great for RV.


Champion 4250 generator has Cold Start Technology that ensures good starts, frequency, operating hours, and intelligently monitors voltage. The smart economy Mode will monitor the electrical load to reduce the engine’s noise, speed, and fuel consumption. 



The 224cc generator’s engine will produce 4250 starting and 3500 running power using gasoline.

It will efficiently run for 22 hours at half load when the tank is full. It has a 6ft propane hose with a regulator where it offers you flexibility.

With only a 0.5-quart tank and low oil shut-off sensor, the inverter operates quietly at 64 dBA from 23ft. 


Since it produces clean and reliable power, you can easily connect your sensitive devices without worrying about their safety. In addition, it is fitted with multiple outlets and two 2.1A USB ports that can be used to charge laptops, smartphones, or smart devices. 


There is an optimal Parallel connection kit sold separately. It will help you increase the output by connecting two 2800-watt or higher inverters. 



  • Affordable
  • Quiet generator-64 dB
  • EPA certified and CARB compliant for safety
  • Assembling the generator is easy 
  • Free lifetime technical support
  • It is 50% quieter and 20% lighter than a traditional generator 
  • This is generator operates both on gasoline and propane with a 4gallon gas tank capacity
  • It gives clean power than can charge your sensitive devices using the 2.1A USB ports



  • The customer support is poor
  • Its remote start feature has a design flaw 
  • This inverter takes 1-3 seconds to respond to a load increase. 


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Westinghouse WGen7500 Dual Fuel Generator

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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.


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

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DuroMax XP10000EH

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

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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
  • Easy two fuel selector switch



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


Also Read: Pulsar 12000 Generator Review [2022]


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

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Why Should You Get One of These?

Buying a dual fuel generator could be worth it as it allows the versatility of producing power from gasoline or propane. This allows you to choose the most available or affordable fuel source.


The option to use propane as fuel allows for a cleaner burn than gasoline, which is safer for the environment and better for the generator as well.


However, dual fuel generator’s run time, noise levels, and portability are not necessarily better than single fuel generators although they cost around $100-$200 more.

So, Which is Best?

All of these dual fuel generators have their pros and cons. But, which is best? There is no one-size fits all answer because it will depend on your specific needs. Each generator has different specialities.



The Champion 4250 is the best performing option with 4,250 peak Watts and a run time of up to 22 hours hours on gasoline at 25% load.



The Champion 4250 is also the most affordable option



The Westinghouse WGen 7500DF is the most portable option and comes with wheels and a foam grip handle included.



The Westinghouse WGen 7500DF also has the best safety features including low oil shutdown, and twist lock/rubber covered outlets. This generator is also CARB compliant meaning its safer for the environment than some other options.



Inverter generators tend to be more quiet than conventional generators, and that’s the case here as well because the Champion 4250 is the most quiet option at only 64 dB.







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Last update on 2023-01-02 / Affiliate links / Images from Amazon Product Advertising API