The versatility, reliability, and portability of a dual fuel generator cannot be easily beat. During power outages or off the grid tasks, a dual fuel generator will provide you with an uninterrupted power supply. Run with either propane or gasoline; a dual fuel generator can be used to power just about anything in your home, from less power-hungry items, such as lights and small electronic devices to bigger and more demanding appliances. There are a variety of other uses for a dual fuel generator set, such as for use in outdoor recreation and camping or construction work requiring an off-the-grid power source.
Generators are crucial and convenient, but they come at costs upwards of $1,000. You will want to make sure that the unit you choose packs the best bang for your buck. Considerations in picking your generator include running wattages on both gasoline and propane, number of available outlets, running time, and fuel consumption.
This list outlines the best dual fuel generators available on the market today. These models provide the best mix of ability, durability, and affordability for a worthwhile investment.
15 Best Dual Fuel Generator
For over 100 years, 130 to be exact, Westinghouse has been a leader in the creation and production of efficient and effective power generators. The Westinghouse WGen 3600 DF is just one of their many generator models but can be considered as a front-runner as the best DF generator.
WGen 3600 is a low-maintenance set generator. But being low-maintenance does not mean it is any inferior in power and capability as the generator is designed with the latest technologies.
This generator boasts ease of use; a single push of a button allows for a quick start-up and removes the need to crank. Notwithstanding that, it also has the pull-start capability, and an additional wireless remote start option, so you can operate the generator set even from a few yards away.
Westinghouse sports an easy fuel selector switch to let you alternate between propane and gasoline, even while the engine is running. Color-coded buttons are pretty straightforward to decipher and make navigating the machine a breeze.
This generator has less power than the top-of-the-line models of some other brands, rated at a starting power of 4650 watts and 4180 watts on gas and LPG, respectively, and a running power of 3600 watts and 3240 watts on gasoline and LPG, respectively. Even with this, it is still enough electricity to run almost any appliance or device.
Other features include a muffler for quiet operation, an automated low oil shutdown sensor, and is backed by CARB compliance. The WGen3600 DF generator is a user-friendly, powerful, and portable generator, supported by stellar customer service assistance and a trusted manufacturer. This generator lands a spot on our best dual fuel portable generator list.
- Three start options: push-button, pull and crank, wireless remote
- Seamless switch between fuel propane and gas sources
- Automatic low oil shutdown gauge prevents machine damage
- Three outlets: a 120-volt AC duplex outlet, an RV-ready 30 amp outlet, and another 30 amp outlet.
- Non-burst tires and foldable handles make for increased portability.
- On full batteries, this generator sometimes surges an excess of electricity to plugged-in appliances
- Propane use with this generator is quite inefficient when compared to its gasoline use
- Quite heavy at 109 pounds and noisy at 69 dB
Why You Should Choose
Westinghouse WGen3600 DF combines power, ease of use, and portability in a worthwhile investment for years to come.
From an established company that manufactures power generation products comes a unique generator that combines convenience, versatility, and performance to provide confidence during a power outage. Enter Champion 3400-Watt dual fuel generator inverter.
Straight out of the box, you get a dual fuel inverter that has a 1.6-gallon gas tank that allows operation for as long as 7.5 hours, and a 20-pound propane tank enough for about 14 hours on ¼ load.
Admittedly, this generator from Champion does not offer as high a wattage as many other dual fuel generators. It produces a peak of 3400 watts starting and 3100 constant running watts on gas, and 3060 starting and 2790 constant running watts on propane. What it lacks in power, though, it makes up for with its features.
Perfect for camping and RV trips, this inverter is significantly lighter and smaller and comes with wheels for ease of portability. Its inverter technology has a smart economy mode, allowing the machine to control the electrical load applied. A quick dial allows easy switching of fuel types, and changing between them will not result in significant power loss.
This inverter generator also produces clean power, with its Total Harmonic Distribution (THD) amounting to only less than 3%. This enables you to power even the most sensitive of your electronics with little risk.
Additional features include the option to attach a parallel kit to give you a clip-on connection to accelerate wattage output, an electric start with its battery that has cold start technology so you will have no problems even in cold weather, and its relatively quiet 59 dB noise.
- Inverter generator with stable output and an economy mode for efficient usage
- Roughly equal performance between gasoline and propane sources
- Extremely portable and quiet, perfect for outdoors
- EPA certified, CARB compliant, clean power use for sensitive devices
- Has a low-oil sensor, three power outlets, and three ignition switches
- Cold start technology for battery ensures starting even in cold weather
- Not as powerful
- Has little starting power
- Small fuel tank without extended tank capability
- No remote start system
- Some concerns about quality control
Why You Should Choose
The Champion 3400-Watt Dual Fuel Inverter is an excellent choice for those who love the expansive outdoors. Perfect for RVs and camping because of its long battery life and smart inverter technology, this generator set is worthy of being called the best dual fuel inverter generator in the market today.
Champion is on this list again, this time with their 7,500-watt generator set. Powered by a reliable engine, this generator can run for about 8 hours on a full gas tank and around 5.5 hours on a full propane tank.
The powerful engine starts at nearly 10,000 watts on start-up and up to 7,500 watts during continuous running on gas. When using propane, the engine starts at 8,400 watts and goes to 6,750 at regular running time. This power is enough for multiple uses, such as camping, RV, or during an emergency power outage.
With such a powerful output, though, the generator could be unstable and could produce an excess of electricity. During times like these, the generator’s reliable volt guard comes in. The built-in surge protector prevents electrical overloads for minimum damage to your appliances and electronic devices.
There is also an “Intelligauge” system that tracks machine specifics such as running hours, voltage, hertz, runtime power output, and maintenance intervals. One more feature is its cast-iron sleeve around the generator to protect it from damage.
- “Intelligauge” system provides monitoring of system specifics
- Steel frame and non-burst wheels provide protection and portability, respectively.
- Automatic low-oil shutoff sensor
- The 10,000-watt engine is powerful and efficient
- Affordable price
- Surge protector adds a layer of safety for your electronics
- Short oil drain can lead to oil slicks and messes
- Poor in-machine lighting makes operating in the dark quite difficult
- Fill tube for oil is in an awkward and hard-to-access position
Why You Should Choose
The Champion 7500-Watt Dual Fuel Generator can be called the best portable generator around today, because of its high wattage, durability, strength, and endurance.
If there is one thing this generator boasts, it is its high power. The DuroMax XP12000EH is perfect for large households as well as businesses and for operating motor-driven appliances and tools. It performs spectacularly using its affordable fuel sources.
Powered by a 457cc OHV engine, this generator can produce a total power of up to a peak of 12,000 watts, enough for virtually any electrical need. At 50% load, the 4-stroke engine has a continuous run time of 4 hours on propane and 9 hours on gas. It has a relatively high THD of 12%, so small electronic devices are at risk of burning. However, more power-hungry appliances such as refrigerators or televisions run no problem.
The generator comes equipped with a heavy-duty steel frame, monitoring interfaces such as a voltmeter and oil levels, safety features such as a circuit breaker, and a low-level light indicator. The isolated motor mounts, as well as its noise-reducing muffler, allows for the quiet operation of the machine.
- 18 Horsepower engine with dual-fuel technology. High power output alone is well worth the price.
- 5 AC outlets along with 1 DC outlet
- CARB compliant and quiet
- Low oil shutoff protects the engine
- Circuit breaker, warning lights, voltmeter, and oil gauge enhance the usability
- Power Boost technology gives you the power to select between 120V and 240V with a single switch.
- The rugged and heavy-duty frame protects the engine
- Large gas tank
- No remote start, only pull-crank, and electric switch
- The generator is massive, but wheels make transport quite easier
- Battery start is quite questionable.
- Limited warranty
- No loading indicator for input and output
- Power drop-off when utilizing propane
Why You Should Choose
One word. Power. If you need power worth the price tag, then the DuroMax XP12000EH provides it in spades through its lucrative engine. It is a cut above the rest with its longevity, efficiency, and performance.
This generator from DuroMax will not provide mind-blowing power or efficiency ratings, but it will also not break your bank account. The XP4400EH’s strength is in its affordability. It is relatively cheaper than most brands while also providing moderate power output.
One convenient feature of this generator is the 7 HP air-cooled engine with a low-oil shutoff sensor. Its 4,400 peak wattage and 3,500 continuous watts on gasoline is not enough for many modern households but is perfect for camping and recreational uses. Its surge arrest and muffler add value to the already reasonably-priced machine. It can run for up to ten-hours on both fuel sources when set-up at half power.
Triple power outlets, two 120V, 20A, and one twist-lock 240V outlet, an analog voltmeter, and a steel frame round up this generator’s features.
- Relatively inexpensive with a moderate power output
- 10-hour runtime at half power can mean power for most of the day
- Three outlets
- Perfect for recreational activities
- Quite noisy and heavy
- Not enough power for many household or business applications
Why You Should Choose
If you had to choose the best dual fuel generator that produces moderate power for RV and camping use at a lower price point, then the XP4400EH is perfect for you as one of the best portable generators.
When using gasoline, this ultra-powerful generator from Champion peaks at 10,000 watts. This machine runs more efficiently on gas, so opt for this fuel source when you decide to buy this model. It is a reliable and robust power source for households and businesses requiring off the grid power, such as food trucks and construction.
The 8000-Watt generator shares some similarities with the 7,500-Watt variant, such as pull-start and electric switch start options, cold start technology to enable powering up even when freezing, and the same “Intelligauge” system.
However, it has a relatively shorter runtime – only eight hours at ¼ power when using gasoline, and five hours under the same amount when using propane.
- Extremely powerful
- Numerous outlets and surge protection capabilities
- Electric and Cold Start technology
- High-quality and reliable
- Short run-times
- Heavy and noisy
- No remote start
Why You Should Choose
The Champion 8000-Watt dual fuel generator packs a powerful punch. It gives high-performance and professional features perfect for a wide variety of applications.
This generator from Pulsar is one of the best dual fuel generator that sports a 10,000W starting power and 8,000W continuous running on gas, and a 9,000W starting and 7,000W running on propane. With that power, PG10000B16 is suitable for powering large homes and appliances, or for applications requiring substantial electric capability.
This generator has a 15 horsepower engine inside a sturdy steel frame with drop-down handles and never-flat wheels. Cart this machine through a cement path, through a forest trail, through rough terrain.
The machine’s Switch & Go feature makes it a breeze to switch between the two fuel sources, even if the engine itself is still running. This capability makes it so that there will be no significant drop-off in power during the switch. The electric push start is easy to use and has the traditional pull-crank start as a contingency. This is also one of the longest-running generator sets today, a 12-hour continuous operation at half-load.
Also, it has a low-oil sensor gauge, a circuit breaker, overload protection, and a 3-in-1 digital voltmeter to give you information about the status of your machine.
- Powerful output, even on propane
- Switch & Go capability makes changing sources a cinch
- Longer runtimes
- 3-in-1 digital voltmeter provides an easy view
- Numerous outlets
- Low oil shutdown sensor lowers the risk of damage
- Choke linkage may easily break
- Heavier than most comparable generator units
- Not suitable for RVs
- Some concerns about inconsistent wattage and power outputs
Why You Should Choose
With its powerful output and seamless switching capability, PG10000B16 runs well on both fuel sources.
This Sportsman generator is ideal for small homes, businesses, and events. It is a relatively low-priced option for a backup power supply for RV owners.
This generator is perhaps the most fuel-efficient one on this list and is apt for people who are conscious about their fuel usage, especially if they are in disaster-prone areas or if they are far from gasoline stations. 3.6 gallons of gasoline allows run times of up to 10 hours, at power levels comparable to other generators. The Gen4000DF has the ability and flexibility to handle most tasks.
Peaking at 4000W and 3500W continuous on gas, while peaking at 3600W and 3150W constant on propane, the generator’s small frame packs a reasonable amount of power.
- Incredible fuel-efficiency
- High-performance for its small frame, relatively cheap
- Five AC outlets
- Compact and portable with a light 90-pound weight
- A wide range of private power applications
- Not too loud and environmentally friendly
- Lack of wheels limit mobility
- No indicator lights to show fuel running low
- Oil connection in an awkward position
- Engine oil must be added with a flexible funnel
Why You Should Choose
For those with comparatively lighter power consumption demands, the Sportsman Gen4000 is the prime choice because of its highly efficient use of fuel resulting in an output comparable to bigger, bulkier generators.
9. WEN DF11000
Wen DF11000 is quite pricier than most generator sets but provides maximum surge power. On gasoline, it peaks at 11,000 watts and continuously runs at 8,300 watts. On propane, it peaks at 9,500 and continuously runs at 7,500 watts. A single half-load tank is enough to finish most tasks a household needs in a day.
It has a total of six outlets, letting you run a wide variety of machines. Its 457cc 4-stroke OHV engine runs best on gas, but the propane option runs just as well as the gasoline option from other brands.
- Exceptionally powerful engine
- Six outlets at several voltages allow the plugging in of many electronics
- Easy transport because of its wheels
- Difficult user interface
- Hard to tell currently operating mode
- Quite expensive
Why You Should Choose
At the cost of extra dollars, you will get Wen DF11000’s incredible engine and numerous outlets for lots of household and commercial applications.
10. Firman HO3652
Even if the FirmanHO3652 is weaker than most generators in this list, it still packs quite a bang. 4,550 surge watts and 3,650 running watts on gasoline, as well as 4,100 surge watts and 3,300 running watts on propane, is still pretty respectable. The generator is still strong enough to handle tasks such as emergencies, camping, and appliances.
The machine’s long run time is probably its most redeeming quality, as its five-gallon tank allows for 14 hours of running time. For people who want to spend less on fuel, this generator is a welcome choice.
Additionally, the machine’s battery life is also on the longer side. The engine rarely runs hot due to its Phoenix Fat Head Block, so you won’t have to worry about heat making it hard to hold. The generator is also quite affordable for its specifications.
- Incredible battery life and run time
- Will not run hot
- No-burst tires ensure that it won’t flatten, even during prolonged storage times
- Cast iron cage along with wheels ensure portability
- Three-year warranty upon purchase
- Weak wattage
Why You Should Buy
Firman HO3652’s only significant flaw is its smaller and weaker wattage, but when you don’t need much, then this dual fuel generator set should cut it just fine. It is cheap with long battery life, perfect for most families or camping fans.
11. DuroMax XP4850EH
The DuroMax XP4850EH is an excellent portable dual fuel generator capable of powering many electronics and appliances. Ideal for smaller households with fewer uses, this generator produces a max 4850 surge watts and 3,850 running watts on gasoline. Choosing the propane alternative will result in a minimal decrease in power. It can be started through an electric switch or manual pulling.
On half-load of gasoline, the machine can run for almost 11 hours, and on a half-load of propane, the engine can operate for about 9 hours. The unit’s cast-iron frame connecting all four corners and solid fill tires add to the portability of the generator.
- EPA and CARB compliant and approved
- Generator lies at the quieter side of the spectrum at 69 dB.
- Convenient start switch, circuit breaker, shutoff, and voltmeter.
- Three power outlets
- Hard to access oil drain plug
- THD is high for sensitive electronics use
- Quite heavy
Why You Should Choose
If you would like a compact generator that produces sufficient electricity for appliances and devices, while being robust and long-lasting, then this dual fuel generator could be the one you are searching for.
12. Pulsar PG5250B
Pulsar PG5250B comes with a 224cc four-stroke engine, big enough to provide surge watts amounting to 5,250 on gasoline and 4,750 watts on propane. In terms of running watts, the PG5250B operates at 4,250 watts on gasoline and 3,850 on propane.
At half-load, the large fuel tank can hold enough gasoline for continuous 12-hour operation. Thanks to the engine’s capability, you will not need to stop the generator to change the fuel source.
Despite lacking an electric-backed start, its switch-and-go recoil start makes ignition easy, even in freezing temperatures. Moreover, meters such as a three-in-one digital meter, low-oil light indicator, and a low-oil shutdown sensor address your monitoring needs.
- Four outlets, namely two 120V outlets, an RV-ready port, and a 120/240V outlet with a twist lock
- Digital indicators allow for convenient and safer operation
- Reasonably low noise levels at 78 dB
- Unit is backed by a 1-year warranty
- High THD levels mean it is risky for sensitive electronics
Why You Should Choose
The Pulsar PG5250B satisfies many power needs while switching between gasoline and propane through a simple dial.
13. Rainier R12000DF
This is one of the best dual fuel generator for you, especially when you have excessive power needs. 12,000 surge watts and 9,500 running watts on gasoline is certainly no slouch, and shifting to propane will not cause significant performance drops.
It has an intuitive control panel with a vacuum fluorescent display, which shows operational hours, frequency, and voltage. It is a sizable advantage knowing when to proceed to refuel.
- Powerful engine
- The large tank allows for about 17 hours of continuous work at ¼ load
- Mobility kit, with two 10-inch wheels and foam grips, make for easy transport
- Lack of 12V DC port
Why You Should Choose
The Rainier R12000DF’s main selling point is its power, perfect for commercial and domestic purposes alike.
14. Quipall 5250DF
With an output of 5,250 and 4,500 surge watts on gasoline and propane, respectively, and running watt ratings between 3,600 and 4,000, the 224cc engine of the Quipall 5250DF has what it takes to power a typical household.
An electric start backed up with recoil, ensure start-up even in low temperatures, and its large fuel tank gives up to 9 hours of continuous operation.
There is an array of safety features and meters that come with the machine. Perfect for residential usage, commercial work, or for outdoor recreation, the Quipall 5250DF has everything you need from a quality dual fuel generator set.
- Four 120V outlets, a 12V DC terminal, and an RV-ready outlet make it ideal for most applications.
- Easy transportation with a solid frame, handle, and no-flat wheels
- High noise levels
15. Pulsar G10KBN
This variant of a Pulsar dual fuel generator is a powerful one, easily capable of up to 10,000 watts surge power and 8,000 running watts on gasoline. Its 6.6-gallon fuel tank equates to 12 hours of continual work, and switching between fuel sources will allow running for up to 24 hours before refueling. This model is one of the best dual fuel generator in the market.
Aside from its safety features such as automatic voltage regulation and digital meters, its electric start-up will allow ignition even in cold weather, and durable coated frames ensure the durability of the machine.
- The 4-stroke engine gives dependable power for hours on end.
- A half-load of gasoline will sustain 12 hours of continuous operation
- Plenty of outlets for different needs
- Safety features
- Incomplete accessories when delivered
Why You Should Choose
The G10KBN packs quite a power behind its strong engine. Plenty of outlets provide for plenty of needs.
Buying Guides: What To Look For In The Best Dual Fuel Generator
There is no shortage of dual fuel generators in the market today, and the problem of overchoice will make it harder for you to choose the right one for your needs and capability. Here are some of the things you should take into consideration to simplify your search.
Size. Free room space is critical in choosing a generator set. Instead of selecting a machine first before thinking about where to put it, do the reverse. Find a device that will fit the space you currently have. There is a myriad of generator sets over a variety of sizes and specifications. Choose wisely.
Power Needs. Take note of the power and wattage you need, which will depend on what you will use it for. If you use it for commercial or construction purposes, then chances are you will need heavy hitters. If you use it for standard home work, then you may consider lighter options.
Noise. You do not want to get complaints from your surroundings about your generator set. Consider their dB ratings to assess what unit to purchase. Noise will also depend on where you will put it, so think ahead on the possible places.
Portability. If you use it for frequent outdoor events, then consider the more portable variants. For home and work usage, you may consider a less portable dual fuel generator.
Budget. This is arguably the most crucial consideration. It could be the most powerful, most portable, and least noisy of all dual-fuel generator sets out there, but if it is out of your budget, then you cannot buy it. Stick to your budget plan; there are all sorts of the best dual fuel generator sets for all budget ranges.
Related read: How Does Gas Generator Work
Benefits of a Dual Fuel Generator
Economical. Dual fuel generators maximize their utilization of gas and consume fuel at reasonably slow rates. Also, dual fuel generators are cost-effective during operation because they can use not only one, but two fuel sources.
Save on Electricity Costs. Dual fuel generators produce optimal and reasonable wattages per gallon of fuel due to a highly efficient combustion process. By knowing the efficiency of each fuel type and planning your operation times, you may have just enough power to last a whole day on one full tank.
Reduce Fuel Storage. You will not have to maintain extra tanks and containers for each type of fuel because the dual fuel generator itself contains ample storage tanks. Furthermore, efficient engines mean that you do not have to use much fuel to run them, leading to lower amounts of stores fuel and logistical efficiency.
More Reliable Than Single Fuel. The best dual fuel generator is built with reliability in mind. They are made to last long, no matter what type of fuel is used. Their efficiency is also superior to single fuel generators, so they are the right choice for many modern households.
Longer Running Times. The best dual fuel generator for you can run uninterrupted for more extended periods simply because of their larger tank capacity and their efficiency. Lots of models come with knobs and meters so you can monitor fuel consumption and adjust wattages to stretch the fuel further. After one fuel source is depleted, the engine automatically switches to the other type of fuel and continues its work.
Dual Fuel Generators FAQs
What size of a generator set do I need?
The size of a generator more likely than not determines its efficiency too. Determine your wattage needs to know the size of a generator you need. Also, make a list of appliances, devices, and electronics you need to power. This provides a clearer picture of the wattages of the electronics you own, and the total energy you may need. All of this contributes to an informed decision on the power and, consequently, the size of the generator set you need to purchase.
Are dual fuel generators suitable for sensitive electronics and devices?
Consult your generator specifications on this one. For sensitive electronics, a lower THD figure is desired. If the AC output is indicated as a pure or clean sine wave, then you can use the AC output for just about anything. If otherwise, then the AC output is not safe to use for sensitive electronics. Keep them away from the AC power source as they may suffer damages.
Is one fuel type better?
The type of gas you are using defines the efficiency of your machine. Diesel is fuel-efficient but is not commonly used for dual fuel generators. Propane and gasoline are also efficient sources of energy. Gas is also reasonably cheap, hence their popularity as a fuel source.
A dual fuel generator allows you to reap the benefits afforded by both propane and gasoline. Gasoline is cheap, but in cases where you do not have access to a gas station, then the propane alternative will let you run your machine, too. The best dual fuel generator is, therefore, more efficient.
Get The Most From Your Dual Fuel Generator
Refill it properly. Always wait for a short time before refueling your generator, around 15 minutes. Gravity can transport the fuel to the carburetor and can cause fires, especially if the engine is still hot. Be careful at night when it is dark. Use a flashlight to make sure you are refilling the right tank hole.
Perform routine checkups. Perform regular checkups to ensure that your machine is still in top condition in case of sudden emergencies. Check to know if pests have made their home on the engine, or if a leak damaged its components.
Use fresh fuel. A common reason why a gas-powered generator encounters problems is because of stale fuel, along with varnish and gum accumulation. Empty the tank and let the carburetor dry if you think you will not use the generator set for a time. Once you plan to start it up again, use fresh gasoline.
Never let the machine run out of fuel. Most generators come equipped with fuel gauges and low-oil automatic shutdown systems that make sure your engine will turn off once oil levels are running low. But in the case your generator does not have this, then it is wise to continually check if fuel has run out.
When you are using the generator to power something, and the oil suddenly runs empty, the electrical load from the electronics plugged in can drain the magnetic field in the generator coils. Once you refill it and start it back again, though, it will not generate power. You will have to go to a specialized repair shop, costing you not only money but time.
The best dual fuel generator is a perfect way to produce electricity, even when you are off the grid because of emergency outages, disasters, or if you are outdoors. The flexibility to choose your fuel source based on the circumstances is unmatched by a traditional single fuel generator. Make you, your loved ones, and your family’s lives more bearable during a power outage, or use it in your next commercial or recreational event.