Best dual fuel Generators are devices used to supply electrical power to appliances or machines. They convert mechanical energy into electrical energy. The mechanical energy is obtained from external sources such as engines powered by gasoline, liquid propane, natural gas, diesel, etc.
It is important to understand that the generators do not create electricity, but supply the mechanical energy that forces the movement of electrons or particles carrying the charge that we call electricity through the wires in the circuit.
Simplifying it further, let us compare the electrical charge to water. The water is there in a pipe or a reservoir. All we do is force the water to flow by applying mechanical force. This force is the push that sets the flow of water into motion. The mechanical force may be in the form of gravity or pedalling of the water wheel.
All generators work on the principle of Electromagnetic Induction mathematically described by James Maxwell and proven experimentally by Michael Faraday. Thus electromagnetic induction is the push induced by a magnetic field in an electrical conductor such as a wire. This push is called an electromotive force or voltage. This voltage sets off a cascade of electrons in the wire which we use as electricity.
This initial push is generated by the generators. The mechanical energy is provided by the fuels you use to run the engine. In the case of dual fuel generators, propane or LNG and air laden with oxygen are drawn into the cylinder. This process is like the one that occurs in a spark ignited engine.
The only difference is that theair-fuel ratio is lesser than in a carburetor. Near the end of the compression, stroke gasoline is injected causing the LNG to burn.
Best dual fuel generators can be fuelled 100 percent on gasoline or in a mixture with natural gas. On both, the modes the power density, transient response and torque curve are maintained.
Best Dual Fuel Generators Uses
Generators power anything that runs on electricity. They are an independent or standalone supply of electricity. And can be used anywhere as they are portable. They are usually used as standby or backup power supply in the event of a power outage. They can also be used for convenience or recreation while camping or partying at a remote location where there is no access to grid electricity.
Considering the greenhouse effect and global warming it is in our favour to use fuels such as natural gas that burn completely. As they burn completely they do not let out residues such as soot, etc.
Also, the calorific value of the fuel makes up for the carbon dioxide emitted, thereby reducing the carbon footprint.Oil and gas are the largest cost of operation. The fuel efficiency of the latest generation of generators allows for an impressive cost reduction. Further, the abundance of natural gas and the expansion of its production have brought down the fuel costs.Besides the integrated controls of these generators have optimized the substitution rate and an automatic and seamless transition between the gasoline and dual fuel modeshave increased the fuel efficiency.
Substitution rate is a critical parameter for dual fuel operation where a portion of the total energy is provided by LNG. Higher the substitution rates the higher the savings on fuel costs. The dual fuel generators are required to meet the compression ignition emission regulations with an oxidation catalyst to lower non-methane hydrocarbon(NMHC) and carbon monoxide (CO) emissions. The ability to function 100% on the two modes offers flexibility depending on the availability of the fuels. You can even switch the fuel whilst the generator is operating. Last but on the least, in the event of fuel shortage one fuel can be substituted for another.
Types of Best Dual Fuel Generators
There are various kinds of generators such as the EMD or Electro-Motive Diesel generators. EMDs are minimal risk and maintenance-free generators with a low RPM rate.Then there are diesel generators,these are a combination of a diesel engine and electrical generator plus an alternator used for peak lopping, exporting electricity and grid support.
The third kind is the portable generators. These are generators on wheels that run on gasoline. And the last type is the natural gas generators that generate 20 – 2500 KW of electricity depending on their size that ranges from 150 – 4000 HP. The dual fuel generators are a combination of the last two types – gasoline and natural gas generators. The functioning of these generators has been explained above.
There are other dual fuel generators classified based on the fuel they use. The diesel generators can use 80% diesel and 20% biodiesel reducing emissions and our dependence on fossil fuels. Emulsified diesel uses a small amount of water mixed with diesel to improve the thermal efficiency and reduce exhaust emissions.We have also reviewed the Τop Best 15 Inverter Generators in 2018.
The features to look for on a dual fuel generator are aheavy-duty frame with four-point rubber mounts. These offers anchorage and a quiet vibration-freeoperation.It should have a set of wheels and handles that make it easy to move around or portable.
There should bean electric start and a recoil rope start system. As the name suggests the gensetshould run on two fuels. The usual choice of the customers is the gasoline and propane generator. But there are generators that run on diesel in combination with other fuels.
The fuel tanks capacity should be able to support 8 hours of running time at a 50% load capacity.
A7-horsepower engine with cast iron sleeves should allow the genset to produce 3850 watts of power continuously and should be able to surge up by another 1000 watts.
It should have a 12-volt DC outlet to charge the batteries.There should be safety sensor such as low oil shut off sensors, voltage guard, etc.
The design andproduction should be EPA approved. And last but not the least, the product should come with a year’s warranty.
Characteristics of Best Dual Fuel Generators
The characteristics to look for are the cost-effectiveness and ease of use. This means it should be easy to crank up and be portable. It should be environmentally friendly and meet the industry standards and regulations.
The generator should have features that help control and modulate the flow of the fuel sand safety shutdowns in the event of a leak. The gen set should be able to run 100% on one type of fuel until both are replenished, making the generator dependable in all conditions.
It should be constructed of a tough material so that it can withstand extreme climate conditions.The design should be supplemented with safety features such as toggle switches, low oil sensors, volt guard, temperature sensors to increase the efficiency of the generator. There should be temperature, Hertz and time gauges to monitor thesefunctions of the generator.
It should have a capacity to generate enormous amounts of electricity and powerful enough to work for long hours. The safety features and gauges should be able to support and monitor the power needs of a wide range of tools and appliances without harming their circuits.
TOP 10 BEST DUAL FUEL GENERATORS IN 2019
|1.Champion 7500 Watt||Cold start technology||$$$||4.9|
|2.Sportsman GEN7500DF||Versatile generator with 7 outlets||$$$$||4.8|
|3.Westinghouse WGen7500DF||Overhead valve technology for lower fuel consumption||$$$$||4.8|
|4.Champion Power 71531||EPA/CARB approved||$$$||4.7|
|5.Champion 3800 Watt||The unit is quiet||$$$||4.6|
|6.Sportsman GEN4000DF||The voltmeter monitors output||$$$||4.5|
|7.Duromax XP4850EH||Works on dual fuel making it extremely convenient||$$$||4.5|
|8.DuroMax 10000 W||Powerful 18 HP engine||$$$||4.5|
|9.Winco HPS6000HE||3600 RPM Honda engine||$$$$||4.4|
|10.Ford FG11050PBE||6 outlets to power from 12V,120V & 240V||$$$$||4.4|
Champion are the leader in the power generation equipment market. Their products are durable, long lasting and set the standards for performance in the industry.You can also visit their website to use a feature that helps you chose the right generator for your needs.The Champion 7500 W Dual Fuel Portable Generator is the best on the market due to the following features.
Design and Build
It has a plug and play design that works out of the box. It works on dual fuel, i.e., propane and gasoline. There is an additional unit that holds 1.2 quarts of oil. It has a reliable engine that makes only74 dBA of noise. The generator has a low oil shut-off sensorthat shuts the engine automatically when it detects that the oil level has fallen below the mark. This prevents damage to the generator prolonging its life and lowering maintenance costs.
The toggle switch offers an electric start with 120/240V operation. The generator has a free battery included with the package. A push of this button not only starts your generator, but also charges the battery while the generator is operating.
The Intelligauge helps track the voltage, the runtime in hours and the hertz. This, in turn, helps monitor the output and schedule the maintenance intervals. There is a built-in Volt Guard to protect your generator and appliances against surges and overloads. It has a rugged built as it is equipped with a one-inchdurable steel frame that is built according to industry standards.
This genset is a great solution as a power backup and standby. It powers refrigerators, sump pumps, lights, computers, modems, routers, microwaves, security systems, ACs, fans, furnaces, well pumps, etc. It can also power multiple power tools such as lawnmowers, lathes, leaf blowers,saws, nail guns, pneumatic torque wrenches, etc. The unit comes with a standard GFCI protected 30A locking outlet.
This is a powerful generator that offers 9375 starting watts and 7500 running watts on gasoline. While on propane it offers 8400 starting and 6750 running watts.
The Champion customer support includes a 3-year limited warranty. A dedicated team of experts also offers a lifetime technical support for free. It has a runtime of up to 8 hours on a full tank of gasoline and 5.5 hours on a 20-lb propane tank. These generators are optimized to start easily in chilly weather.
They come with foldable handles and never-flat tire kit. The offer includes 1.2 quarts of 10W-30 viscosity oil to withstand high engine pressure and maximize its performance. The package also includes a 3-foot long propane hose with a USDA approved spark arrestor.
• A low noise level comparable to a dishwasher or a vacuum cleaner
• EPA-CARB/ 50 states compliant
• Powers and protects all appliances & power tools
• Automatic low oil shut-off sensor
• Cold start technology
• Volt guard
• There may be customer service issues
• Crank up your generator periodically to check if it needs servicing
Why it the best of the lot:
The Champion possesses all the characteristics of a quality Dual Fuel Generator and exceeds the industry standards. As this generator sets the benchmark for other it is the best generator in the market.
Sportsman generators are a well-known brand by Buffalo Tools. The company has been lending its expertise in the power tool industry since 1964. Moving ahead with the times, the company’s website has easy to use features on the website to help you choose the right model for your needs.This is the next contender in the line and here are its features:
Design and Build
You can use the generator right out of the box. This dual fuel genset runs on unleaded gasoline and liquid propane gas. It has a reliable 13 HP 389cc, 4-stroke OHV engine with a gasoline tank fitted with a fuel gauge. It runs quietly at 80 dBA with a runtime of 9 hours at 50 percent load on 6.2 gallons of gasoline and 5 hours on a 20-lb LPG cylinder. It also had a low oil shut off sensor that shuts the engine when running low on oil. It also has a 25-Oz tank for engine oil.
The engine has a recoil start. To use the electric-start feature, install a 12-volt motorcycle battery. The generator also has a built-in circuit protection with an engine shut off switch and circuit breaker. This generator is equipped with 7 outlets – four 120-volt outlets, one 120V RV outlet, one 12-volt DC outlet for battery charging, and a 120/240-volt outlet. It has a built-in automatic voltage regulation system to protect your electrical appliances and devices. It is fitted with a heavy-duty steel frame to withstand rugged use and climate.
This generator is ideal for homeowners, contractors and recreational activities. It can run the RV, power tools and household appliances. Portability makes it great for outdoor use while camping or on job sites and a reliable standby during power outages. It runs on LPG and gasoline offering you flexibility during an emergency and on the road.
It has a 7500 surge watt and 6000 running watt capacity on liquid propane gas and gasoline, respectively.
The genset comes with a 5-foot propane fuel hose fitted with a regulator and spark arrestor. There is a Mobility kit with wheels and a handle making it a portable unit. It has a 2-year limited emission-related warranty and 1-year limited warranty. Fitted with UL listed electrical components, it is easy to repair and maintain. The generator is EPA approved. If you want to use a larger propane tank call the customer service. It should be noted that the surge watts or running watts may drop by 10% when on propane versus gasoline.
- Dual fuel – liquid propane and unleaded gasoline
- Portable with wheels and handle
- Versatile generator with 7 outlets
- UL listed electrical components for easy maintenance
- Battery is not included
- Engine oil not included
- The propane tank is not included
These generators come from the Westinghouse Electric Corporation founded in 1886. The company has been actively developing electric infrastructure in the country since its inception. Their equipment has been designed by some of the best minds in the field such as Nicola Tesla, Frank Conrad, Stephen Timoshenko, William Stanley, etc. Theymake motors, turbines, generators, switch gear, etc.
The next in the line is the Westinghouse due to these features:
Design and Build
This unit runs on gasoline and propane. The WGen7500DF features a remote start operated by a key fob. This allows you to access power at your convenience. It also has a push button and electric start making it easy for anyone to operate.
The unit puts out up to 10 hours of run time at 50% load due to its 420cc, OHV engine with a cast iron sleeve. There are three receptacles – two 5-20R 120V Duplex and one L14-30R – that offer you multiple outlets to power all your appliances.
The circuit is protected by a voltage regulator, it has a low-oil shut-off and other safety features that prevent overload and other damage to the motor. The shut-off triggers not only when the oil level is low, but also when the oil overheats or loses viscosity. All Westinghouse engines incorporate an overhead valve technology that allows the engine to run at lower temperatures and use less fuel than the conventional side-valve engines.
The unit has a digital hour meter displayed on the control panel that helps schedule regular maintenance ensuring long-life and lasting utility. WGen7500DF has a sturdy hardened-steel frame with roll bars on the top of the unit for additional protection for the 6.6-gallon gas tank. These bars also offer additional options for transporting and securing the unit.
The WGen7500DF is a perfect portable power solution for emergency power supply for home, job site, campsite, tailgate party, or other project that needs power.
When running on gasoline it gives 9,500 surge watts and 7,500 running watts. On propane, it puts out 8550 watts of surge power and 6750 watts of running power.
Everything you need such as funnel, manual, tool kit and a quick start guide are packed along in a box. The genset comes with a 3-year warranty and lifetime technical support. It is EPA, CSA, CARB compliant.
- Remote start operated by a key fob
- Overhead valve technology for lower fuel consumption.
- Everything you need in a box such as a funnel, toolkit, etc.
- Digital hour meter to schedule regular maintenance.
- Low-oil shutoff and circuit protection.
- Easy fuel selector switch
- Battery not include
- Engine oil is not included
- The propane tank is to be bought separately
Since 2003, Champion has earned a reputation for its design and production. They excel in their knowledge of heavy machinery and produce standby generators for homes, portable generators, winches, inverter generators, log splitters and engines.This generator is a contender for the top spot due to following features:
Design and Build
The Champion 71531 operates on LPG or propane and unleaded gasoline. The propane tank is not provided, but there is a 6-gallon gasoline tank attached to the unit. You can switch fuel at the flip of the fuel selector. This feature also ensures safe operation on either fuel.
The engine is powered by a 439cc OHV engine with a cast-iron sleeve. It gives 7500 watts of rated power and 9375 watts of starting power which is the unit’s maximum output. The runtime is 9 hours on a full tank of gasoline or 5-gallon propane tank at 50% load. The engine oil is included to lubricate the engine and enhance its performance.
There are six outlets on the unit – four 120V (5-20R) outlets, one 120/240V (L14-30R) Outlet and one 120V (L5-30R). You can crank up the unit by a recoil start, but there is provision for electric start as the battery is provided. The unit is mounted on a durable steel frame with 10-inch wheels making the unit portable.
The unit is enhanced with overload protection, low oil sensor and Intelligauge. The intelligauge monitors the volts, hertz and operating hours data. This helps schedule a regular maintenance thereby increasing the utility and life of the unit.
The Champion 9375-Watt generator provides portable power for your home or job site anytime. It can power all your home and office appliances and power tools such as light, pumps, drills, TV, furnace fans, security systems, etc.
The unit offers 7500 watts of rated power and 9375 watts of starting power.
Mobility kit is included with each unit. EPA/CARB approved for sale in 50 States. The Champion 71531 comes with a 2-year limited warranty and a lifetime free technical support.
- Excellent customer service
- Battery is included
- Engine oil included
- Intelligauge to prolong life and utility of the unit
- No propane tank with the unit
We have a Champion again, not only do their innovative designs set the industry standards by lowering fuel consumption and raising safety standards. But also, their customer service by certified technicians, who offer unparalleled service for 100% satisfaction.The features are as follows:
Design and Build
This generator works on two fuels – gasoline and propane. Just unpack and instantly access 4750 starting watts and 3800 running watts of power. The unit runs up to 9 hours on a full tank of gasoline and up to 10.5 hours on a 20-lb LPG tank.
It is powered by a reliable 224cc engine that revs up with a touch-start. It also has a push-button electric start for which the battery is included. It comes with an internal battery charger that charges the battery while the generator is running. The 3.4-gallon gasoline tank is attached while there is a propane inlet to attach the hose from the propane tank. The Champion 3800 runs quietly at 68 dBA from 23 ft.
There are 4 outlets – one 120V 30A RV, one 120V 30A locking and two 120V 20A- to power all your devices. All the outlets are secured by Volt Guard, it protects your appliances from power spikes and surges. The unit isportable due to its never flat tires and folding handle.
The Champion 76533 is a powerful addition to your recreational vehicle, home and workplace. It is also a reliable and cost-effective solution as a standby for power outages or other emergency situations.
On gasoline, the Champion will produce 4750 starting watts and 3800 running watts. While on propane 4275 starting watts and 3420 running watts.
Champion offers an excellent customer support with a 3-year limited warranty and a free lifetime technical support. The package includes a propane hose. The unit is EPA and CARB certified.
- The unit is quiet
- It is EPA and CARB certified
- Battery includedCons
- Engine oil should be included
- Rotting tubes could be a safety hazard
- Ensure you get a fresh piece as the rubber hoses tend to rot due to moisture and prolonged period.
These generators are a part of the Buffalo Tools brand. The Sportsman series comprises of food processing/cookware, general merchandise and generators
Design and Build
Get yourself the advantage of a dual fuel generator that offers the flexibility in fuel choice. You can switch fuel from propane to gasoline or vice versa, at a flip of a switch. The reliable engine is powered by a 212cc OHV engine and delivers the maximum power output of 4000 watts and effective power of 3500 watts. The engine runs for 10 hours on a full tank of 3.6 gallons of gasoline and a 50% load capacity.
The genset comes with an intelligent panel design to simplify operations. To the left-hand side is the on/off switch for power. To the right-hand side is the circuit reset, a 12V battery charging outlet and a ground terminal. At the centretop of the panel is the voltmeter and below are four 120V power outlets. You can use these to power your household appliances and there is a 120V RV outlet too.
The Sportsman can handle any contractors power needs, power outage, household appliances and outdoor activities such as tailgating or camping.
The Sportsman GEN4000DF delivers a maximum power output of 4000 watts and effective power of 3500 watts.
There are features for overload protection such as a circuit breaker that automatically shuts off the system in the event of an overload. The voltmeter consistently monitors the voltage output. The battery charger charges your batteries so that the unit is ready to use during a power outage. The propane hose has a regulator to monitor the LPG flow and level.
- Easy to setup and start using
- The voltmeter monitors output
- A battery is included and charges while the unit is operating
- The manual is clear and detailedCons
- Always check the hose for rot
Duromax is synonymous with affordable dependability. This California based brand builds their own engines ensuring quality. You can visit the website for a comparative study to pick your model.This generator is next in line due to these features:
Design and Build
The Duromax has a 210cc, 7 HP, 4 – stroke, cast-iron sleeved air-cooled engine. As the moniker “dual fuel” suggests you can run this unit on gasoline and propane. The toggle switch allows you to shift between fuels with ease. The XP4850EH runs for 20 hours on propane and 8 hours on a full 4-gallon tank of gasoline. The unit fires up with an electric start and there is a pull-start as a backup.
The power panel has four outlets – two 120V 20-amp outlets, one 120V / 240V 30-Amp Twist-Lock outlet and a 120V DC output. There is a circuit breaker and voltmeter too. The Duromax makes tolerable levels of noise at 69 dBA at 7 meters. This is roughly equivalent to human conversation. Of course, the noise level depends upon the load – higher the load, louder the noise. Due to its size, weight and portability features such as the never-flat tires and handle, the unit can be wheeled anywhere.
The XP4850EH is good to power your home appliances such as refrigerator and furnace. It can also serve as a standby or alternative power source for your recreational and power outage needs.
The Duromax XP4850EH can produce a maximum output of 4850 watts and a rated output of 3850 watts.
The Duromax has a low oil indicator that shuts off the engine when the oil is running low, overheating or low in viscosity. There is a muffler to dampen the noise and a spark arrestor to prevent fires. It comes with a manual, an electric start-up and a voltmeter that indicates the voltage. The unit is EPA and CARB approved.
- Works on dual fuel making it extremely convenient
- Compact portable design with a mobility ki
- Safety features such as the low oil indicator, voltmeter, etc
- EPA and CARB approved
- Maybe a bit loud under heavy load
Duromax means maximum durability, pick your genset from 20 different models in their range. Shortlist your generator according to the functionality, the power output you require and the fuel types you that are available. One such dependable suggestion is the 10000 watt hybrid due to these features:
Design and Build
The XP10000EH has a powerful 439 cc, 18 HP air-cooled 439cc engine. It has an electric start, that is as simple as starting your car. When the battery is discharged just pull the recoil cord to crank up your generator.
The panel has safety features like the low oil shut-off indicator,a circuit breaker and a voltmeter. There are AC and DC regulators that keep your unit in a top working condition. The 8.3-gallon fuel tank can run for 10 hours on gasoline and 20 hours on a propane tank.
The voltage selector allows access to maximum power via the six receptacles for standard, heavy duty and battery charging requirements. The unit is EPA approved. The unit comes with a heavy-duty four-point mount that reduces vibrations for a quieter operation.
The Duromax XP10000EH powers anything that runs on electricity. It can power your RV, home or office. It can serve as a standby in the event of a power outage.
This generator has a surge output of 10000 watts and rated output of 8000 watts.
The unit has an idle control switch that automatically lowers the RPM when the power is not being used. It also ramps up the production at a higher load. This feature reduces fuel consumption and the noise level, which is at 72 dBA. The hose comes with a regulator and spark arrestor. The customer support is highly trained and knowledgeable to help you get over glitches if any. The unit comes with a 1-year warranty. The box contains a 12V generator battery, wheel kit, toolkit and a user manual.
- Powerful 18hp engine with cast iron sleeve and steel bearings maximize engine life
- Idle control switch
- Mobility kit makes it portable
- Voltmeter, voltage selector and low oil indicator
- Quite heavy, thus difficult to move around
Winco has been providing highest quality electrical goods since 1927. Since last 80 years they remain the leading manufacturer of generators, to electrician, home owners, agricultural businesses, etc.The features that put this genset on this list are as follows:
Design and Build
This is a versatile bi-fuel unit with a Honda 11 HP, GX340 engine. The engine is adaptable, quiet and offers greater fuel efficiency. This bi-fuel runs on liquified natural gas and gasoline. The unit comes with a standard electric start, a battery rack and cables. The battery is not included. There is a dual element air filter that reduces maintenance.
As you cannot hand crank the generator fast enough to develop a proper vacuum to start the vapour fuel system, an electric start has been provided. The engine shuts down when the oil pressure falls oroverheat. This protects the engine from damage.The unit comes with an EPA approved 4.5-gallon steel fuel tank that eliminates hydrocarbon emissions.
The unit generates an AC current of 120V and 240V. There is one dual 120V 3-prong/straight blade outlets (NEMA 5-15R) and one 120/240V 30A twist lock (NEMA L14-30). The runtime is 9.8 hours at 50% load, and 5.2 hours run time at full load. It has a moderate noise level of 72dB at 7 meters.
There is a brushless alternator with an inherent voltage regulator. It has less than 6% total harmonic distortion (THD) and 100% copper windings and NEMA class-F insulation. The unit is mounted on a sturdy wrap around 1-inch tubular cradle. The electronics are protected by premium square D – circuit breakers or visi-trip indicators. Every unit is load tested before it is shipped out.
This unit can be used to power home appliances, office devices and power tools.
The Honda engine offers 6000 surge watts and 5500 rated watts on a full tank.
The unit comes with a 3-year warranty.
- 3600 RPM Honda GX engine
- Low oil alert
- Has a cast iron sleeve
- No hand crank to start the engine
- Portability kit sold separately
This generator comes from Ford Power Equipment and is a licensed product of Ford Motor Company by Pulsar Products, Inc. Their reliable products include generators, air compressors, pressure washers, water pumps, etc. In short, they understand and innovate machines. The features that place this genset on this list are:
Design and Build
This genset has a single cylinder, 4 – stroke, air-cooled, 457cc, OHV engine. The Ford FG11050PE starts with a simple push-button, electric-start. The start is powered by its own maintenance-free battery. There is a provision for a recoil start too. The engine is EPA, CSA and CARB-certified.
The unit has six outlets to power everything from 12V, 120V and 240V. The runtime on a 6.6-gallon tank is 9.5 hours with a low oil sensor. The noise level is around 78 dBA. The frame is powder-coated 32 mm steel tubing with a premium design that is easy to move and compact enough to store. There are 10-inch tires that make the unit portable. There is a fold down counterbalanced handle to move the unit where you need power.
This heavy-duty portable generator powers anything that needs electricity.
The maximum output of this generator is 11050 watts at 60Hz and the rated output is 9000 watts at 60Hz.
There is a digital hour-meter, an easy-to-read gas gauge and a GFCI outlet protection. These are covered with weather beater rubber covers on all outlets. The zinc-coated fuel tank interior helps prevent tank corrosion from the inside. There is a 2-year warranty on parts and one-year labour warranty.
- Low fuel indicator
- Rubber flaps to cover all outlets
- The tank should be made of steel