Best Dual Fuel Generator – Top 9 Reviews

Are you looking for the best dual fuel generator that can run on gasoline and propane? This article will help you make the right decision. We will look at 9 best generators are capable of running on two fuels. After that we will go over the factors you need to consider when buying a generator.

Nowadays our reliance on power to carry on our day-to-day activities has become so much that life without it seems inconceivable. With increasing events of extreme weather and power outages on the rise, generators as an alternative source of power are a boon. The convenience of a generator is only increased when you add portability to the equation, which allows you to carry your generator wherever you go.

Today, there are several kinds of generators available which make the choice quite mind-boggling. However, if you are looking for a portable generator that offers utmost versatility, as well as convenience, then you could consider buying a bi-fuel generator.

The main advantage of using a bi-fuel generator is that if one of the fuel sources becomes unavailable, then you can run the generator on the alternative fuel in the case of an emergency. So, if you run out of gasoline, you can always connect a propane cylinder and run your generator on that. When both fuels are available, you can run whichever fuel is most affordable in your part of the country at the time.

Now let’s look at reviews of 9 top generators that run on gas and propane on the market today.

In-Depth Reviews of the 9 Best Dual Fuel Generators

Generator ReviewsMax Continuous Running WattsMax Starting Watts
1. Champion Power Equipment 76533
Our Top Pick
3,8004,750Check Price
2. DuroMax XP4850EH
Great Value-For-Money
3,8504,850Check Price
3. Champion Power Equipment 100165
A Reliable Option
7,5009,375Check Price
4. DuroMax XP10000EH
A Powerful Unit
8,00010,000Check Price
5. DuroMax XP4400EH
3,5004,400Check Price
6. Pulsar PG4500B
The Most Portable
3,1004,500Check Price
7. Sportsman GEN4000DF
3,5004,000Check Price
8. Sportsman GEN7500DF
A Mid-Range Option
6,0007,500Check Price
9. Smarter Tools ST-GP7500DEB
6,5007,500Check Price

1. Champion Power Equipment 76533 – Our Top Pick

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When speaking about efficient bi-fuel generators, the top of the list is easily the Champion Power Equipment 76533. This mid-range budget generator runs on both gasoline as well as propane and has a runtime of around 9 hours on a full tank.

The Champion Power Equipment generator has an extremely powerful and reliable engine. The generator has several outlets that allow you to connect multiple devices and the outlets have a voltage guard that helps you protect your appliances in case of a power surge. The quick start button allows you to start the engine with one simple push of the button.

This 76533 model from Champion is a very high-quality generator offering superior performance. It is no little wonder that the Champion generator is among the best-selling generators available in the market.

Features of the Champion Power Equipment 76533

  • Runs on gas or propane.
  • 9 hours of runtime on a full tank of gas and 10.5 hours on 20 lbs of propane.
  • 3800-watt continuous and 4750-watt surge power.
  • Powered by a 224cc engine.
  • Push button electric touch start.
  • Outlets secured against power surges by the volt guard.
  • 3-year warranty, free lifetime technical support.

  • Quick and easy startup.
  • Very user-friendly.
  • Ability to connect multiple devices.
  • Very reliable.
  • Power surge protection.


  • A bit expensive.
  • Quite heavy.

2. DuroMax XP4850EH – Great Value-For-Money

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The DuroMax XP4850EH is a highly efficient generator ideal to meet your heavy-duty power requirements. The generator has 2 outputs – rated AC output that gives 3850 watts and Max AC output that gives 4850 watts.

This unit features a quick start switch that helps to start up the machine effortlessly. The generator also has a low-oil indicator that provides an indication of when the oil level is low and needs to be topped up and it also has a voltmeter that shows the voltage being used.

This portable generator is EPA certified and is safe for use in US National Parks. The machine has wheels which make it convenient to move the generator around, especially if you’re using it while camping outdoors. The DuroMax XP4850EH is fairly inexpensive and is a definite value for money buy.

Features of the DuroMax XP4850EH

  • 7HP air-cooled engine.
  • Output: AC output – 3850 watts and Max AC output – 4850 watts.
  • Heavy-duty frame with isolated mounts for quiet and smooth operation.
  • Low oil indicator and shut off.
  • Equipped with full power panel with voltmeter, key start switch, low oil warning indicator, power outlets and circuit breakers.
  • EPA approved and safe for use in US National Parks.

  • Approved by EPA.
  • Portable.
  • The generator gives you great bang for your buck.
  • Display that indicates voltage and low oil levels.


  • Assembly more difficult than other generators.
  • Has only 2 outputs.

3. Champion Power Equipment 100165 – The Reliable Option

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If you are looking for a portable generator as a long-term investment and one that will last you for many years, then the Champion Power Equipment 100165 is an ideal buy. The generator comes pre-assembled, which makes it very convenient and you can start using it right away without spending a lot of time on the setup process.

The Champion Power Equipment 100165 can run on either propane or gas only and does not support any other kind of fuel. The unit has a high-power output and gives a runtime of around 8 hours on a full tank of gas and 5 hours on propane. The portable generator has an electric start for convenient and quick starting and the generator runs on regular batteries. This machine comes with a 3-year repair or replacement warranty.

This portable generator comes with multiple outlets and has a volt guard to protect your appliances from any power surges, making them safe. Although this model is more expensive and the cost is on the higher side, it is one of the most reliable bi-fuel generators in the market making the Champion Power Equipment 100165 worth the investment.

Features of the Champion Power Equipment 100165

  • Runs on gasoline and propane.
  • 8 hours of runtime on a full tank of gas and 5.5 hours on 20 lbs of propane.
  • 7500-watt continuous and 9375-watt surge power.
  • Powered by a 439cc engine.
  • Push button electric touch start.
  • Outlets secured against power surges by the volt guard.
  • 3-year warranty, free lifetime technical support.

  • Wheels enable easy portability of the unit.
  • Longer lifespan and performance.
  • Backed by a 3-year warranty which is well above industry standards.
  • Multiple outlets.


  • Large in size.
  • Fairly expensive.

4. DuroMax XP10000EH – Powerful Unit

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The DuroMax XP10000EH is a very powerful generator and has a very high wattage output, which makes this machine ideal for powering many large appliances. However, the generator is multi-functional and it can be used to power both large and small appliances.

The DuroMax XP10000EH is a 10kW generator that runs on both liquid propane as well as regular gas. The unit is extremely easy to use and is quite convenient to move around as it is equipped with wheels. Compared to many other generators in this category, the DuroMax XP10000EH is relatively lighter, which makes it ideal for outdoor activities like camping, fishing, etc. The electric start button makes starting the generator very quick and easy.

The generator also allows you to choose between 120 and 240 volts as required by you, which makes the DuroMax XP10000EH very versatile. This model is also equipped with a low oil indicator that alerts you when the fuel is running low. The generator comes with DC and AC regulators which ensures that the generator does not malfunction and also makes it very safe to use with all your appliances. If your budget for a portable generator is sufficiently large, then the DuroMax XP10000EH is a great buy.

Features of the DuroMax XP10000EH

  • 18HP engine with steel bearings and cast-iron sleeve for optimal engine life.
  • 8000-watt continuous and 10000-watt surge power.
  • Equipped with full power panel with voltmeter, key start switch, low oil warning indicator, power outlets and circuit breakers.
  • Silent exhaust.
  • Inbuilt spark arrestor.
  • EPA approved.

  • Very powerful generator.
  • Has multiple output sources.
  • AC and DC regulators to ensure the safety of your appliances.


  • Quite expensive.

5. DuroMax XP4400EH – Budget-Friendly

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If you’re looking for a relatively inexpensive generator compared to the DuroMax XP10000EH, then you could consider the DuroMax XP4400EH. This generator runs on propane and gasoline and allows you to power up the devices in your home very conveniently.

The generator has 3 outlets that are protected by a voltage lock, which keeps all your appliances safe in the case of power fluctuations. The DuroMax XP4400EH features with a voltmeter that allows you to monitor the power and it also has an electric switch for easy and quick starting. The circuit breaker safeguards the appliances in the case of any mishaps.

The DuroMax XP4400EH provides an incredibly long runtime of a whopping 20 hours on a full tank of propane and around 8 hours on gas. However, if you want to run multiple large appliances together, then the DuroMax XP4400EH may not be able to support it. The generator comes with wheels, which makes it very convenient to transport it and carry it around.

Another drawback of the DuroMax XP4400EH is that it is suitable for use in only dry places. So, the generator may not be ideal if you plan to use it in an area where it rains constantly or you plan to use the generator outdoors.

So, if you want performance without causing a huge dent in your pocket, then the DuroMax XP4400EH is the best buy for you.

Features of the DuroMax XP4400EH

  • 3500-watt continuous and 4400-watt surge power.
  • Durable 7HP air-cooled engine.
  • Low oil shutoff.
  • Equipped with full power panel with voltmeter, key start switch, low oil warning indicator, power outlets and circuit breakers.

  • Inexpensive, budget buy.
  • Small in size, easy to move around.


  • Can be damaged if exposed to water.

6. Pulsar PG4500B – The Most Portable

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Of all the generators reviewed in this article, the Pulsar PG4500B is the most portable generator. This compact generator comes with a single OHV cylinder and a 4-stroke air cooled engine, which makes it especially lightweight and extremely portable. When running on gas, the generator has a runtime of around 15 hours on a full tank of fuel at 50% load capacity.

The Pulsar PG4500B generator can be started using the recoil start. The generator has 2 outlets – a 30 ARV outlet and a 120V twist lock outlet. The generator also comes with 3 variations of power depending on your power requirements and you can choose from between 4500 watts, 7500 watts or 10000 watts.

The Pulsar PG4500B is ideal to power your appliances in your RV; however, you can also use it as a power backup in your home. So, if you’re always on the move and want to take your generator with you wherever you go, then the Pulsar PG4500B is a perfect buy.

Features of the Pulsar PG4500B

  • 3100-watt continuous and 4500-watt surge power.
  • OHV single cylinder.
  • Recoil start.
  • 4-stroke, air-cooled engine.
  • 4-gallon fuel tank with gauge.
  • Two outlets – 30 A RV and 120V twist lock.
  • Comes with a wheel kit.

  • Inexpensive and a budget buy.
  • Extremely portable.
  • Very lightweight.


  • Takes a long time to start up.
  • Does not have any indicators.

7. Sportsman GEN4000DF – Old-Fashioned

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The Sportsman GEN4000DF is perfect for those who want an old-fashioned generator. However, having said that, this model is one of the most powerful in its category and produces a good power of around 3500 watts. This Sportsman generator runs on propane or gas and has a runtime of around 10 hours on a full tank at a 50% load. The generator is very efficient when it comes to power consumption and is equipped with a voltmeter so that you can monitor the power being used.

Due to its design, the Sportsman GEN4000DF is not portable and cannot be carried around and needs to be stored in a single place, as it requires that the cylinder is attached to it at all times. The generator has 4 outlets and it comes with a regular hose kit.

The Sportsman GEN4000DF is EPA approved, which makes it suitable for outdoor use, although it may be difficult to do so. This generator can power RVs and homes with modest power requirements. This machine comes with a 1-year warranty.

Features of the Sportsman GEN4000DF

  • 3500-watt continuous and 4000-watt surge power.
  • Has 4 outlets.
  • Comes with hose kit.
  • Runtime of 10 hours on full tank of gas or propane at 50% capacity.
  • Less than 69 decibels rating.
  • Recoil start.
  • 212cc OHV engine.
  • EPA approved.
  • Weight: 90lbs.
  • Comes with 1-year limited warranty.

  • Old-fashioned efficiency.
  • Budget-friendly, inexpensive.
  • EPA approved and therefore can be used outdoors.


  • Not portable.
  • Does not have a low fuel indicator to show if the tank is low on gas.

8. Sportsman GEN7500DF – The Mid-Range Option

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The Sportsman GEN7500DF is a modern dual gas generator. This compact generator is very efficient and delivers excellent performance. In a tank of 6 gallons of gas, the generator gives a runtime of around 9 hours.

The generator features an RV-ready outlet and its portability makes the Sportsman GEN7500DF well-suited for use in your RV or for outdoor camping trips. GEN7500DF generator is EPA approved, making it safe for use outdoors. The full panel of the generator allows you to connect everything you want to.

This model comes equipped with a low oil indicator and shuts down when the oil level is low indicating that it needs to be refueled. The electric key allows you to start the generator with a simple turn of the key. So, if you’re looking for a generator for your mid-range power generation requirements, you can consider the Sportsman GEN7500DF.

Features of the Sportsman GEN7500DF

  • 6000-watt continuous and 7500-watt surge power.
  • 6.2-gallon gas tank provides 9 hours runtime at 50% load.
  • Electric and recoil start.
  • Automatic low oil shut down.
  • EPA approved.

  • Comes with multiple outlets.
  • Portable.
  • Well-suited for use on camping trips/with your RV.
  • Dual start system.


  • Does not include the battery for electric start system.
  • Slightly expensive.

9. Smarter Tools ST-GP7500DEB – Versatile

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The Smarter Tools ST-GP7500DEB is a 7500-Watt generator that runs on propane or gas. The generator has a runtime of around 9 hours on a 6-gallon tank of gas at 50% capacity. This unit is quite powerful that you can run several devices all at once. The panel of the generator has many outlets and indicators that are very easy to read.

The electric start button makes the starting of the generator quick and efficient. The generator has wheels, which makes it very convenient for it to be transported and moved around. This portable generator is EPA and CARB approved, which makes it safe and suitable for outdoor use, camping, etc. The unit comes in an assembled form, so you can start using it immediately.

The Smarter Tools ST-GP7500DEB generator is packed with features and can be considered as a worthy investment, although it is on the higher side in terms of the price.

Features of the Smarter Tools ST-GP7500DEB

  • 6500-watt continuous and 7500-watt surge power.
  • Generator can work on propane and gas with fuel switch.
  • Electric start with battery included.
  • 6.6-gallon tank provides 9 hours runtime at 50% load.
  • The noise level of 72 decibels.
  • EPA and CARB approved.

  • Easy to maneuver around.
  • Suitable for outdoor use.


  • Not very fuel efficient.

A dual fuel portable generator is quite handy to have around, especially if you face frequent outages or you want to use the generator for your outdoor camping trips, to power your RV, etc. However, what you must keep in mind is that these generators will not switch on automatically in the case of a power outage and power your entire house. You need to turn them on manually either by using the recoil starter or the electric start switch. A twin fuel generator provides a lot of conveniences and most importantly, having the option of choosing between two fuels ensures that you are prepared for any kind of emergency.

So, before you make your final decision to buy a bi-fuel generator, evaluate your need vis-à-vis the various features and the pros and cons of the different models available in the market before you make your final decision on the best portable generator for you.

Pros and Cons of the Different Types of Fuels

Generally, there are generators that can run on the following fuels:

  • Gasoline
  • Liquid propane
  • Diesel
  • Natural gas

Commonly, most of the portable generators run on a single type of fuel. However, with advancements in technology, today, we have generators that can run on two fuels, also known as bi-fuel or dual fuel generators that usually run on gasoline and propane and you also have tri-fuel generators that can be operated on propane, gasoline or natural gas.

Diesel and gasoline are the most common type of fuels that are easily available at your local gas station. Liquid propane is the fuel that is most commonly used to light up your barbecue and is also available very easily. Natural gas is what you usually use in the kitchen for cooking or to heat your water and is delivered to your home via your local utility company.

Let us now take a look at some of the pros and cons of the different kinds of fuels that can be used to run your generator.


Gasoline is the No. 1 choice among fuels to be used in generators as the fueling process of gasoline is fairly simple. The main benefit of gasoline is its accessibility and it is very easily available everywhere and is very easy to obtain from your local gas station. Generators that run on gasoline are very easy to operate and you can get very budget-friendly options too.

However, the major problem with gasoline is that you will have a problem if there is a gasoline shortage in your area. Since gasoline has a very short shelf life, you cannot store it for more than one year. It is extremely inflammable and if you live in an area that has very cold weather, then this is the least ideal form of fuel. The price of gasoline keeps increasing compared to the other types of fuels and it is also extremely messy, as the carburetor of the generator may get clogged and result in poisonous emissions which may be hazardous. However, if you use the generator quite often and keep the gasoline fresh, then you won’t have any clogging or emission problems.


In the recent years, propane has become a popular fuel of choice as generator fuel. Propane is a clean-burning fuel that does not clog up the carburetor like gasoline and it has an indefinite shelf life. So, even if you have not used your generator in years, it will start up without any trouble if you’re using propane. Propane generators, in general, are more silent and quiet when running than gasoline counterparts.

However, the fuel system of propane generators is more complex and the cost of installation and maintenance of propane generators can be costlier. Propane generators have a shorter life and higher fuel consumption when compared to diesel generators.


Another very common fuel used to run generators is diesel. Generators that use diesel as fuel are best for generators producing 150kW power or more. Diesel is least flammable and is best for long-term use. Also, in terms of cost of operation, diesel generators are least expensive. Diesel has a shelf life of around 1.5-2 years, so you must keep this in mind when buying a diesel generator. Diesel may not be ideal for extremely frigid temperatures; however, the problem can be resolved by using a fuel additive.

Natural Gas

Another fuel option for generators is natural gas or LPG. Natural gas is very beneficial as it can be easily obtained and is quite prevalent. If you are using natural gas already in your home for cooking and heating, then the type of generator that runs on LP gas is ideal. Natural gas is also suitable for frigid areas. Compared to diesel generators, the ones that run on natural gas have a higher engine life expectancy and a higher rate of fuel consumption. Tri-fuel generators have the option of running on natural gas, gasoline or propane.

The main drawback of natural gas is that it is not suitable for areas that are prone to earthquakes and extreme storms as the service may not be available due to the LPG lines getting damaged.

Advantages of Dual Fuel Generators

There are many benefits of using a generator that runs on two types of fuels:

  • Dual fuel generators run on two types of fuels using an advanced system and so they increase the flexibility of delivering emergency power since they can run on several different fuel combinations which offer optimum performance in all types of operating conditions.
  • If you have a major power outage and run out of gasoline in your generator, then having a bi-fuel generator is especially beneficial, as you can simply switch from one fuel to another and carry on using the generator.
  • Dual fuel generator units are economical to run and save electricity costs.
  • These generators produce low gas emissions, making them environmentally-friendly.
  • They reduce the fuel storage requirement.
  • The fuel mode is automatically selected depending on the fuel level and the automatic switch which changes the generator if the supply of one fuel fails and this occurs instantaneously so that the power supply is not interrupted. This is especially useful in places such as hospitals, etc. where a major power cut can be disastrous.
  • Another important factor to consider is the fuel storage. Although gasoline is a popular choice, it cannot be stored for a long time and will evaporate if it is too hot. Propane has an indefinite shelf life; however, very cold temperatures cause the propane to contract and the pressure drop will cause the generator not to start up only on propane. The advantage of a twin fuel generator is that it offers you the option of running your generator on either one of the fuels irrespective of the climate.

Are Dual Fuel Generators Less Effective?

Twin fuel generators are in no way less effective than a regular single-fuel generator. The power you get from these generators is in no way less. Whatever your power requirements are, whether it is to run the appliances in your RV, to power your home, run power tools for a project or run the cooling or heating system in your home, all these can be done with a dual-fuel generator just as effectively as with a single fuel generator. Until recently, single fuel generators were the most popularly used; however, due to their versatility and benefits, gradually bi-fuel and tri-fuel portable generators are gaining popularity.

What to Consider When Buying a Dual Fuel Generator?

Determine the Need

Before going in for a portable two-fuel generator, ensure that you understand your requirement and what purpose you will be using the generator for before selecting a particular product. Different generators have different power voltages and may or may not be able to run specific appliances and devices.


Bi-fuel portable generators are extremely versatile and beneficial, especially if you require power when you’re on the go. However, you must check whether the generator you are buying is suitable for use outdoors or not. Some generators may not be suitable for places with heavy moisture or in snowy areas. Ensure that you buy a twin-fuel portable generator that will work in the weather of your area.


This class of generators are especially advantageous as their running is not limited to a single type of fuel. This makes these generators very convenient and easy to use and you don’t have to go around looking for fuels to power up the generator, as most of these units work on either propane or gasoline that are easily available. However, your generator may run more efficiently and longer, depending on the type of fuel you choose. So, when you’re buying this type of generator, make sure that you check the runtime on the specific fuel used and select a generator that runs more optimally on the type of fuel you will use more.

EPA and CARB Approved

Certain states such as California may not allow generators if they are not EPA and CARB approved, due to laws and regulations related to power consumption. So, you must ensure that the portable generator you plan to buy meets the required regulations and standards of your particular area.


While the cost of the generator is a very important factor to consider; however, you must not neglect the other features when buying one, as buying a generator is a long-term investment. Cheaper generators may fit into your budget; however, may not be a great decision in the long run, as they may not run as well or may fail often, requiring frequent repairs and maintenance thus increasing the overall operational cost.

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