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Dual Fuel Generators

Compare and find the right dual fuel generator for you

The Best Dual Fuel Generator For The Money

Best Power

DuroMax XP13000EH Review

Size (inches)

29 x 30 x 26

Weight

236 lbs

Tank Size

8.3 gallons

Wattage

13,000 

Engine

500cc

Best Ready to Use

Champion 7500 Watt Portable Generator Review

Size (inches)

27.8 x 28.7 x 26.4

Weight

202.4 lbs

Tank Size

6 gallons

Wattage

7,500

Engine

439cc

Best Reliability

Size (inches)

23.3 x 22.8 x 21.3 

Weight

109 lbs

Tank Size

4 gallons

Wattage

4,650

Engine

212cc

What customers said:

Great Product: Right Size and Price

Size (inches)

27.3 x 20.6 x 21.9

Weight

214 lbs

Tank Size

6.6 gallons

Wattage

11,000

Engine

457cc

Size (inches)

27.9 x 18.1 x 20.5 

Weight

120 lbs

Tank Size

5 gallons

Wattage

4,550

Engine

208cc

Size (inches)

24 x 17 x 17

Weight

127 lbs

Tank Size

3.96 gallons

Wattage

4,850

Engine

212cc

Size (inches)

20.25 x 20 x 20.5 

Weight

99 lbs

Tank Size

3.8 gallons

Wattage

4,000

Engine

212cc

DuroMax XP13000EH: Best Power

DuroMax XP13000EH Review

Summary & Features

Warranty: 3 Year

The DuroMax XP13000EH Portable Dual Fuel Generator is one of the most powerful generators you can buy that remains portable. With this generator, you’ll be able to power multiple power tools at the same time. Plus, you can use it to run appliances including lamps, refrigerators, and air conditioning units.

This generator has a DuroMax 20HP engine with 500cc. It has an initial power of 13,000 watts and 10,500 running watts. What’s more, it runs on MX2 technology, which means you toggle between 120V and 240V or run both at the same time. It’s a reliable choice and a backup generator that you’ll be happy to have when the grid goes down. 

Like all of the generators on this list, it uses dual-fuel technology. What this means is that it runs on both gas and propane. Not only does this add flexibility but it also enables you to switch between the different fuel types to maximize efficiency.

It has a rugged design that’s a bit bulky, but it’s still portable enough for use at the job site or anywhere you need. Some other features include idling to help conserve fuel, an automatic low-oil shutoff to prevent damage to the generator, and a keyed electric start which is a lot easier to use than the traditional cranking system. 

Plus, it has all-terrain solid-fill tires for wheeling on paved roads and muddy conditions. And this unit is entirely made from metal, with copper windings for longevity. In other words, this generator is one you’ll have for years to come.

Pros

  • User-friendly design
  • Easy to use keyed electric start and power panel
  • Powerful 500cc engine
  • Large fuel tank

Cons

  • Confusing propane regulator

Champion 7500-Watt: Best Ready to Use

Champion 7500 Watt Portable Generator Review

Summary & Features

Warranty: 3-year limited warranty with FREE lifetime technical support

The Champion 7500-Watt Portable Dual Fuel Generator stands out for its simplicity and ease of use. You can literally pull it out of the box, add fuel, and start using it without a lot of fuss. Plus, Champion is a trusted brand with a track record of producing quality products. 

This generator has an easy electric start feature and a 439cc engine that offers up to 7,500 watts of operating power. This four-stroke single-cylinder engine is easy to maintain and has a built-in cooling system to prevent overheating. It also has a cast-iron sleeve around the engine for improved durability, and features Cold Start Technology, ensuring it starts quickly in colder weather.

While this unit is not the most powerful on our list, it does offer eight hours of continuous use on gasoline or six hours on propane. And this generator is much quieter than others on this list, with a minimal operating noise of 74dB. It’s about as loud as a household vacuum cleaner, which is a lot quieter than many other generators. 

Another key feature of this generator is that it has multiple outlets on its exterior, including four 120V 20A household outlets, a 120V 30A locking outlet, and a 120/240V 30A locking outlet. Each one is GFCI certified, ensuring safety and protection against damaging your tools and appliances.

This unit also has all-terrain tires, so it’s easy to navigate through tough and rocky terrain. It’s easy to transport and maneuver. What’s more, it has an intelligauge, so you can easily keep track of runtime hours, hertz, and voltage. This way it’s easy to maintain and you’ll be able to keep track of oil levels and when the low-oil shutoff sensor is about to shut the unit down.

Pros

  • Easy setup and use
  • Convenient electric start
  • Runs efficiently on propane (with a low noise level)
  • Rugged construction for outdoor use

Cons

  • No fuel level indicator

Westinghouse WGen3600DF Dual Fuel Generator: Best Reliability

Summary & Features

Warranty: 3-year limited warranty

The Westinghouse WGen3600DF Dual Fuel Generator is a rugged and reliable choice. Its features are intuitive and it has a convenient plug-and-play design. In other words, it’s ready to use right out of the box, with easy to use controls and very little assembly required.

This generator has a four-stroke OHV 212cc power engine with a specially designed cast-iron sleeve to protect the engine from damage. It produces 4,650 peak watts and up to 3,600 rated watts when running on gasoline. With propane, you’ll have up to 4,650 peak watts and 3,240 rated watts.

On the outside of the unit, there are several different outlets, including a 30-amp L5-30R outlet, a 120V duplex outlet, and an RV-ready TT-30R 30-amp outlet. It also has a low-oil automatic shutdown to save the generator from burning out. 

However, this generator’s fuel tank is only four gallons, which will give you up to 18 hours of runtime with a 25% load but will require frequent refueling if you’re trying to use it as a backup for your home. That said, it’s simple to switch from gasoline to propane with the flip of a switch, so you can refuel without turning off the unit.

Overall, this generator is best suited for campers and RVs. If you’re looking for a backup generator for your home, you might consider a generator with a larger fuel tank and a bit more power. Still, this one is ready to use out of the box and it comes with a tool kit, oil funnel, oil, and a user’s manual. 

Pros

  • Remote control electric start with a key fob
  • Low oil automatic shut off
  • Fuel inverter generator
  • Runs equally well on gasoline or propane
  • Perfect for RVs and campers
  • Switch fuel types with the push of a button

Cons

  • Can cause electrical surges

WEN DF1100 Dual Fuel Portable Generator

Summary & Features

Warranty: 2-year product warranty

The WEN DF1100 Dual Fuel Portable Generator has a rugged exterior and is built for outdoor use. It’s designed to provide power for RVs and power tools while out on the field. Plus, WEN is a trusted brand that produces many quality products you can trust.

This generator has a reliable four-stroke 457cc OHV engine. With gasoline, you’ll have 11,000 starting watts and 8,300 running watts, while propane offers 9,500 starting and 7,500 running watts. Plus, to switch between the dual fuel types, all you have to do is move the dial. 

However, what really makes this generator stand out is its versatility. It has lots of outlets, including four 120V GFCI outlets, a 120V/240V 50A outlet, a 120V 30A twist-lock outlet, and a 12V DC plug. Plus, it allows you to switch from 120V to 240V so that you can transfer switches immediately. Also, this feature makes it better as an emergency backup generator.

This generator has a fuel tank that holds up to six gallons of fuel, which will give you about eight hours of run time at a 50% load. It’s designed with all-terrain 10-inch wheels, making it more portable than some of the options on this list. On top of that, it has foldable handles for moving it that can be collapsed to save space. 

Pros

  • Rugged construction for outdoor use
  • Versatile voltage and outlet options
  • Powerful engine
  • Fuel inverter generator
  • Easy to transport

Cons

  • Heavier unit
  • Higher learning curve than some others

Firman H03652 Hybrid 4550/3650W Dual Fuel

Summary & Features

Warranty: 3-year manufacturer’s warranty

The Firman H03652 Dual Fuel Portable Generator is small but effective. It’s ideal for simple outdoor tasks, camping, and outdoor kitchens. While it’s not as powerful as some of the other generators on this list, it’s designed to be efficient and is perfect for those who need a simple and portable power source.

This generator is built for fuel-efficiency. So, while it does not offer the same level of power many generators do, it provides consistent energy with a runtime of up to 14 hours. It has a five-gallon fuel tank and is propane ready. 

It has a Pro-Max Series 208cc engine, providing 4,550 watts of starting power and 3,650 watts of running power on gas, and 4,100 starting watts and 3,300 running watts on propane. What’s more, it has an integrated Phoenix FatHead Block to help keep the engine running cooler and to prevent overheating, even when used in hot weather conditions.

On top of that, this generator’s engine is protected by a rugged cast-iron sleeve, meaning it can handle some abuse and is ideal for outdoor projects. It also has an automatic low-oil shutdown feature to guarantee the engine is protected at all times from potential damage. 

As far as portability is concerned, this generator is one of the easiest to take with you on this list. It has eight-inch never-flat tires that are heavy-duty enough to withstand sharp rocks, mud, and other difficult terrains. Plus, it has a U-shaped padded handle for excellent maneuverability. 

Lastly, the Firman H03652 Dual Fuel Portable Generator comes with an extended propane hose for use on larger tanks. This feature, along with the generator’s 14-hour runtime makes it one of the best and most portable generators on this list. 

Pros

  • Portable and lightweight (135 pounds)
  • Low emissions
  • Reliable 14-hour runtime
  • Very low noise level when using propane
  • Rugged tires make it maneuverable and versatile

Cons

  • Lacks 220V capability 
  • Wattage is relatively low

DuroMax XP4850EH

Summary & Features

Warranty: 1 year parts warranty

The DuroMax XP4850EH Dual Fuel Generator is one of the quietest running generators on the market. It features a full metal design, with copper windings for longevity. Plus, its outlets are GFCI protected and it runs equally well on propane or gasoline.

This generator is robust and can handle home use, while still being portable. It can be run using gasoline or propane, so it’s a versatile choice. However, you can also connect it to a BBQ gas line for cleaner-burning fuel that will ensure your generator will still be around for years to come. 

On top of that, this generator offers consistent power. For propane, you’ll have 4,608 starting watts and 3,658 running watts. For gasoline, you’ll have 4,850 starting watts and 3,850 running watts.

All in all, this generator is perfect for tailgating, job sites, emergency backup, camping, and your RV. It has three outlets, including two 120V 20A household outlets (GFCI protected) and one 120V/240V 30A twist-lock outlet, enabling you to plug in up to three household appliances at once.

Nonetheless, the DuroMax XP4850EH has a relatively small fuel tank. It holds less than four gallons of gasoline, which does limit your available power somewhat. 

Pros

  • Quiet generator
  • Electric start
  • Lightweight at 130 pounds
  • No assembly required
  • All-terrain never-flat tires
  • Fuel inverter generator
  • Runs on propane efficiently

Cons

  • Limited warranty
  • LPG hose can melt if not properly placed

Sportsman GEN4000DF

Summary & Features

Warranty: 1-Year Manufacturer’s Limited Warranty

The Sportsman GEN4000DF Dual Fuel Generator is a powerful generator designed for homeowners and contractors. It can power your home in the event the power goes out, but it’s also lightweight enough it can be transported to the job site or other area to provide power where power is needed. 

This generator weighs only 99 pounds. So, although it doesn’t have wheels like a lot of the other options on this list, it’s still portable enough to make it a versatile choice. You can take this one on the road, in a travel trailer, or as a source of power for work. It runs on either propane gas or gasoline, whichever you choose. 

One of the standout features of this generator is the fact that it burns cleaner fuel. This feature helps to prolong the life of the generator and is good for the environment. It has a 212cc OHV engine that boasts 4,000 watts of rated power and 3,500 watts of starting strength. At 50% load, you’ll have a solid 10 hours.

Considering this generator’s relatively small gas tank (less than four gallons), it’s best used for moderate tasks. That said, it’s the most fuel-efficient generator on our list and is relatively quiet at less than 69dB. 

What’s more, it has six outlets, including one 120V RV outlet, four 120V household outlets, and one 12V DC outlet. Plus, it comes with a propane hose and is ready to use out of the box. It’s an excellent option for anyone seeking affordable power that is portable and flexible.

Nevertheless, this generator’s lack of wheels makes it far less maneuverable than many of the options on this list. And the oil connection is poorly placed. To refill the oil quickly, you’ll need to purchase a separate flexible funnel. 

Pros

  • Only weighs 99 pounds
  • Fuel efficient
  • Clean burning
  • Simple to use and easy to maintain
  • Low noise level
  • Fuel inverter generator

Cons

  • Lack of wheels
  • Poorly placed oil connection

Introduction

The best dual fuel generators run on two different types of fuel, usually propane gas and gasoline or diesel. The advantage of this setup is that you can switch between fuel types depending on what will be most efficient for your particular situation. 

This type of generator produces fewer toxic emissions than diesel-only models. What’s more, the best dual fuel generators are highly flexible, a cost-effective source of power, and are ideal for many operating conditions. 

With this in mind, we’ve put together this comprehensive guide to help you find the best dual fuel generator for you. Let’s get to it!

Things to Consider When Purchasing a Dual Fuel Generator

When it comes to purchasing the best dual fuel generator, there are a few things you should keep in mind. First, think about what you need the generator for. Is it for camping, using at the worksite, or as backup power for your home? Once you know how you intend to use the generator, you’ll be ready to consider the following.

Size and Weight

Size and weight are significant factors when it comes to choosing a generator, as they determine how easy or difficult it will be for you to transport it. Too big and it may not fit in your car or truck. Too heavy, and you may struggle to lift or move it. 

Most models fall somewhere between 22 and 30 inches across. However, their weight can vary greatly, ranging from 100 to 300 pounds. That said, most of these types of generators will fit in the back of a truck, but it’s critical that you realize how portable a generator really is before you buy it.

There is a direct correlation between power outputs and size and weight. Meaning, the larger and heavier the unit, the more power it can produce. As such, larger generators are good to have as a backup source of power for your home but may be too bulky and heavy for trucking out to the job site every day. 

Wheel Kits

While we’re on the subject of transportability, another factor that determines how easy or difficult moving a generator from one location to another is its wheel kit. Fortunately, a lot of portable dual fuel generators come with wheels to help maneuver them around. 

With wheels, a generator can be tilted back as if it was on a dolly and wheeled to the desired location. That said, not all generators come with wheel kits, with some being sold separately, and the quality of the wheels can vary.

If you’re looking for a generator that you can transport, consider its wheel kit. Are the wheels built to handle rough terrain? Will they hold up in inclement weather or when pushed through dirt and mud? No matter what, having a wheel kit makes transporting a generator a lot easier than not having one.

Power Output

The best dual fuel generator has a power output between 1,000 and 12,000 watts. The level of power depends largely on the size and weight of the generator, as well as the functionality of its mechanics and what fuel it’s using.

Each generator is rated to have peak power outputs and running power output. The peak power output is the highest amount of watts the generator can produce at one time, while the running power output is the average number of watts it provides during use.

The power output a generator can produce is also affected by the type of fuel it’s burning. Most generators report the power output when it is running on gasoline as this type of fuel produces more wattage than propane. However, each generator has a separate rating for propane use. 

Of course, some companies only list the highest possible peak and running outputs, leaving customers to guess the difference between gasoline and propane. What’s more, some generators have a feature that allows them to switch between propane and gasoline depending on the amount of power drawn from it. 

Whatever the case may be, the power output of a generator running on propane gas is typically only 300-500 watts below that of gasoline. For this reason, it’s fairly easy to estimate if the need arises.

Fuel Capacity

Fuel capacity is the amount of fuel that a generator holds in its tank. Most dual fuel generators feature a tank ranging from two to ten gallons in size. Obviously, the larger the tank, the longer the generator is able to run before it needs refueling.

Keep in mind that fuel capacity on these types of generators refers only to the amount of gasoline it holds. It has no bearing when using propane. With propane, the fuel capacity is dependent on the size of the separate gas tank you’re using. 

Propane tanks are attached by a hose and pressure regulator. For this reason, this is another critical factor to consider when it comes to determining how easy or difficult it is to transport the generator.

Also, be aware that the larger the gas tank, the heavier the generator is going to be when you need to move it. This can be somewhat mitigated by waiting to fill the tank until you have arrived at your destination, but you’ll still need a way to transport the fuel.

Noise Level

All generators produce sound, but some are louder than others. In general, it’s best to find the best dual fuel generator that has the power output you need with the lowest possible noise output. That said, depending on the generator’s size, it will produce between 50 and 90 decibels (dB). For reference, here are some equivalent noise levels to give you an idea:

  • Motorcycle: 95 to 110 dB
  • Hairdryer: 70 to 90 dB
  • Refrigerator: around 50 dB

The sound level of the best dual fuel generator is also affected by the type of fuel on which it’s running. In general, the generator will be louder when running on gasoline rather than propane. Most generators make about as much noise as a hairdryer on its low setting. If noise is a concern, consider getting a small inverter generator

Start Switch vs. Recoil Cord

Traditionally, duel fuel generators feature a recoil cord to start them. However, more and more models have begun using a start switch or button. While start switches are easier and technological advances have made them more reliable over the years, they require a small amount of stored power in the generator to function properly.

To start a dual fuel generator with a start switch, all you have to do is flip it on. The power for this function comes from an internal battery where the generator stores extra electricity it produces when it’s on. This feature may appear as a button, FOB, or keypad function on some generators. While certainly more convenient than pulling a recoil cord, if the generator’s internal battery is not charged, the electric start won’t work.

A recoil cord is a technology that has been used for a long time. You’ve probably seen it on lawnmowers, chainsaws, and various power tools. It’s a cord that starts an engine or dual fuel generator by pulling on it quickly to produce a momentary burst of electricity that kickstarts the generator. This method requires more effort than an electric switch, but it enables you to start your generator even if it’s been sitting in the garage for years. 

Lift Hook Bar

A lift hook bar is a simple bar attached to the generator used to raise and lower it to the ground. Its goal is to make lifting the generator easier, especially when going up or down stairs or a ladder. For those who need a generator brought up to a platform on the job site, the lift hook bar is an essential feature.

That said, the lift hook bar adds weight to the generator, making it harder to handle. If you’re not planning to use the generator out on the field or job site, it’s best to get one that forgoes this feature. 

Dual Fuel Generator Efficiency Tips

The truth is, both propane and gasoline have their advantages and disadvantages. The beauty of the best dual fuel generator is that you can run it on either fuel type depending on your particular circumstances.

In general, gasoline is readily available and can be purchased at the gas station down the street. Propane, on the other hand, is a bit harder to come by but can be less expensive. So, you can save money by running your generator on propane when you can, but you’ll also have the option to switch over to gasoline if that’s the only fuel type you can get.

Maintaining Efficiency In Hot and Cold Weather

If you live in an area where the temperatures can swing between hot and cold, dual fuel generators are a safe bet. For instance, during the summer months, you can use propane gas to fuel your generator because it burns more efficiently in warm weather. 

Conversely, during the winter months, you can switch to gasoline because it burns better when it’s cold. In this way, you can maintain efficiency without going into a lot of trouble or by buying multiple generators for different times of the year.

Prolonging the Runtime of Your Dual Fuel Generator

You can prolong the runtime of your dual fuel generator by keeping both fuel types on hand. To maximize how long your fuel generator can run before it needs refueling, begin with a full propane gas tanks and a full gasoline tank. 

When the gasoline runs out, you can then switch over to the propane tank. This method gives you time to pay a visit to the gas station and return without having to turn off your generator. In this way, your worksite, campsie, or house always has power no matter what happens.

Dual Fuel Generator Safety Tips

Dual fuel generators are a portable way to produce electricity. However, they can be dangerous and it’s essential to take proper safety precautions when using them. For instance, any generator that runs on gas produces carbon monoxide, which can be deadly. If you experience any of the following symptoms, go outside immediately to a well-ventilated location:

  • Fainting
  • Dizziness
  • Shortening of breath
  • Minor headache
  • Nausea or vomiting
  • Weakness
  • Blurred vision
  • Confusion

Because of the risk of carbon monoxide poisoning, you should always operate your generator outdoors. It’s best to have it in an open location with lots of ventilation. If you have to run it indoors for any reason, be very careful and if you begin to see any of the symptoms above, stop using it immediately and go outside. 

Don’t Use Extension Cords Longer Than 100 Feet

All generators produce noise and some are extremely loud. For this reason, many users place their generators as far from where they are working as possible. While this certainly makes conversation easier, it’s essential that you can experience a drop in voltage if you string your extension cords too long. 

It’s never a good idea to use extension cords longer than 100 feet. Any longer than that and there can be a drop in voltage that can cause motors to burn out. 

Refill the Gas Tank Properly

Many dual fuel generators are built to be as compact as possible. While this makes them lighter and less unwieldy, it also means that the engine is located near the gas tank. When it comes time to refill the gas tank, if the engine is still hot it can ignite, along with any extra fuel that happens to already be in the tank.

For this reason, it’s crucial to always wait at least 15 minutes before you refill your generator’s fuel tank. If the hole to refill your gas tank is small, you may want to purchase a funnel to make refilling it easier and to prevent spillage. Pouring gas in the wrong spot could cause a fire to erupt. 

Don’t Run Out of Fuel

Another important tip to keep in mind, especially when using a dual fuel generator to power your home, is to never let it completely run out of fuel. If the generator begins shutting down because it has run out of fuel, the electrical load from your house can drain the magnetic field in the coils of the generator. 

If this happens, your generator will still start and the engine will run, but it won’t be able to produce power anymore and you’ll need to have it fixed. It’s best to avoid this situation altogether and keep extra fuel on hand so that you never run out. If you do, then shut the generator down manually until you can get more fuel. 

Only Use Fresh Fuel

Dual Fuel generators need fresh fuel to run. If the fuel has gone stale because it has been sitting in the tank for a long time, your generator may not start. You can avoid this issue by adding a fuel stabilizer to the gasoline to prevent much of the breakdown.

It’s generally recommended that you empty the tank if you don’t plan on using your generator for a while. Let the carburetor run dry and then put your generator away for storage. 

Always Keep Your Generator Secure

Since you’ll be running your generator outside, it’s important to keep it secure. For example, if you’re using a backup generator for your home, the last thing you need is someone stealing it. Always chain your generator to something solid to prevent theft. This is especially important if you’re using the generator overnight.

Routinely Check Your Generator

If you’ve purchased a generator to use as a backup, it’s likely put away until you need it. The problem with this is that if it sits there for too long, something could happen to it, such as bugs nesting in the engine or damage from water. Then, when you need it most, it might not work.

To avoid this problem, it’s essential to routinely check your generator to make sure it’s in good working condition. Do this will also ensure the generator lasts for years to come.

FAQ

Do you still have questions? If so, we may be able to address them with these FAQs.

Are dual fuel generators any good?

If you’re in need of portable or backup power, consider getting a dual fuel generator. This type of generator is one of the most versatile options on the market. It can switch between fuel types for maximum efficiency depending on the situation. Dual fuel generators are one of the best ways to get the most bang for your buck.

Is it cheaper to run a dual fuel generator on gas or propane?

When you have the option, it’s generally advisable to run your dual fuel generator on propane gas. Propane gas is cheaper than gasoline and burns cleaner. Plus, it’s easier on the engine, prolonging the life of your generator.

Can dual fuel generators run on natural gas?

Most dual fuel generators are not designed to run on natural gas. However, it is possible to get conversion kits that will enable this function, but it can be dangerous working with natural gas, so be sure you know what you’re doing before you try to do something like this.

Do dual fuel generators have a remote start?

Many dual fuel generators these days have an electric start feature, which is much easier to use than the traditional recoil cords. What’s more, some even have remote start, meaning they can be turned on from a distance using a key FOB like the ones used for cars.

What’s nice about this feature is that you can start your dual fuel generator from the inside of your home or RV without having to go outside. This feature can be quite helpful if it’s storming outside or during a natural disaster.

Final Thoughts

When you need power remotely or when the grid goes down, dual fuel generators can be a lifesaver. However, everyone’s needs are different and finding the dual fuel generator that’s best for you can be a challenge. 

However, we hope the information in this article will help you to find the best dual fuel generator for you. Although you really can’t go wrong with any of the generators on this list, our top three are:

  • Best Powerful Generator: DuroMax XP13000EH Dual Fuel Generator
  • Best Reliable Generator: Westinghouse WGen3600DF Dual Fuel Generator
  • Best Quiet Generator: DuroMax XP4850EH Dual Fuel Generator

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