The Complete Dual Fuel Generators Buying Guide

Dual Fuel or “Bi-Fuel” Generators are gaining popularity based on the simple fact that they are more versatile and allow you to decide what fuel they want to use. The best Dual Fuel Generators are capable of running on either Gasoline or Propane, they are great for an emergency situation where you only have access to one type of fuel.

There are many benefits of owning a Dual Fuel Generator:

  • They Can Operate on Standard Gasoline
  • The Can Operate Using a 20lb Propane Tank (Commonly used for BBQ’s)
  • Dual Fuel Generators Can Produce More the 12,000 watts!
  • They Adhere to Strict Standards and Compliance Regulations

When operated on propane the generator will run for an extended period of time without compromising the power output. With most dual-fuel generators being portable and equipped with wheels there is no trade up for opting to go with a Dual Fuel Generator.

You have the choice of what fuel you would like to use, and you can base your decision on what’s cheapest and the most accessible. They’re great for camping and using with an RV if you run out of gas you can quickly steal the propane tank from you BBQ and keep the powering going.

We comprised our top picks and broke down 5 of the best Dual Fuel Generators so you can make an informed decision before buying. If you don’t find one that exactly matches your needs, take a look at this full list of Dual Fuel Generators available.

5 Best Dual Fuel Generators

Champion 3400-Watt Dual Fuel RV Ready Portable Inverter Generator with Electric Start

The Champion 3500-Watt Dual Fuel Generator is fantastic in our books, we have looked at this generator before in our Inverter Generator Buying Guide. The Champion Dual Fuel Generator is capable of running on both gasoline and propane.

Equipped with Champion’s 192cc OHV engine that’s capable of producing 3400 surging watts and 3100 continual running watts of power. The Champion 3400 watt Generator is able to run for 7.5 hours on gasoline under a 25% load and an extended 14.5 hours under a 25% load using a 20lb propane tank.

Outlets Included:

  • (2) 120v 20 amp outlets
  • (1) 120v 30 amp locking RV outlet
  • (1) 12v DC outlet with a USB port


  • 192cc Engine
  • Electric Start
  • 3400 / 3100 Watts
  • Compliant in all 50 States
  • 95.7lbs / 18.3 x 17.3 x 25.1 Inches

Safety features include a low oil automatic shutoff to prevent engine seizing due to insufficient oil. CARB compliant allows this generator to be shipped and operated in the state of California.

Champion includes their amazing warranty that covers your Generator with a 3-year warranty and provides free lifetime technical support.

Duromax XP4850EH 3850 Running Watts/4850 Starting Watts Dual Fuel Electric Start Portable Generator

The DuroMax XP4850EH is a great example of a Portable Dual Fuel Generator great for operating on large job sites as well as for recreation. The heavy-duty full cover roll cage is sure to protect the generator from common abuse seen on construction sites.

The 7 HP 206cc air-cooled DuroMax OHV engine is large enough to produce max surge power of 4850 watts and 3850 continual running watts capable on Gasoline and Propane. While running the Generator produces 69 DB’s.

Outlets Included:

  • (2) 120v 20 Amp 3 Prong Household Outlets
  • (1) 120/240v 30 Amp Twist Lock Outlet (NEMA l14-30 3-Pole 4-Wire)


  • 7HP 206cc Duromax Engine
  • 4850 / 3850 Watts
  • Spark Arrestor Muffler
  • Electric Start
  • NON-Carb Compliant

DuroMax equips their Generators with a full line of safety indicators including the advanced Oil Warning Light, Low Oil Indicator with automatic shut-off and Spark Arrestor Muffler for safe use in the woods while camping. This generator has an Electric Key Start and a manual EZ Pull Recoil.

Included in the purchase is (1)  Battery, (1) Spark Plug Wrench, (1)  Full Wheel Kit for Portability. From the date of purchase, you will receive a 3-year DuroMax factory Warranty.

DuroMax XP12000EH Dual Fuel Portable Generator

This is the second Dual Fuel DuroMax Generator featured and is sure to make up for any extra power needed. Nicknamed the “BEAST” it truly can live up to that name with its massive 457cc 18hp engine (The same size as most large ride on lawnmowers) It’s capable of producing an insane 12,000 watts surging power and 9500 continuous running watts.

The BEAST is the ultimate resource for natural disasters to power your entire home or for large RV’s on the road. The power this generator puts out is commonly seen in fixed home standby units, not portable generators.

Outlets Included:

  • (2) 120v 20 Amp Household Outlets
  • (1) 120v 30 Amp RV Outlet
  • (1) 250v 30 Amp Outlet
  • (1) 240v 50 Amp Outlet


  • 18HP 457cc Duromax Engine
  • 12,000 / 9500 Watts
  • 269 lbs 28 30x40 Inches
  • Enough to Power a House
  • Individual Breakers

The EP12000EH is able to run for 10 hours on gasoline with a 50% load and a whopping 20 hours under a 50% load on propane using a standard 20lb BBQ tank. The generator features individual breakers to prevent overloading and has an EPA safe Spark Arrestor Muffler making this perfect for trips into national parks and wooded areas.

Weighing 269 lbs you will need some assistance to move the generator but with a 12000-watt generator that is expected. Operating at a low 72 decibels which is about as loud as a dishwasher you can rest assured it can run outside without interrupting you inside.

The DuroMax EP12000EH is 1-UL Listed, CSA Certified, EPA Approved and comes with a 1-year parts warranty. – Non CARB compliant, cannot ship to the state of California.

Sportsman GEN4000DF, 3500 Running Watts/4000 Starting Watts, Dual Fuel Powered Portable Generator

Sportsman is a very common and well-regarded name in the outdoor sporting industry. The Sportsman GEN4000DF is a great Dual Fuel Generator with a 4-stroke 7 HP 212 cc OHV engine that’s EPA approved capable of producing 4000 starting watts and 3500 continual running watts.

Running at a low 69 decibels making it ideal for outdoor camping and staying in the RV without being annoyed to death by constant loud drone in the background.

Included Outlets:

  • (4) 120v 20 Amp Household Outlets
  • (1) 120v 30 Amp RV Outlet
  • (1) 12v DC Outlet


  • 7 HP 212cc OHV Engine
  • 4000 / 3500 Watts
  • Weighs 90 lbs
  • Dimension: 24.5″ x 17″  x 16.5″
  • 10 Hour Run Time

The GEN4000DF is able to run for 10 hours with a 50% load on gasoline utilizing the huge 13.6 Gallon fuel tank and 12 hours with a 50% load using a 20lb BBQ propane tank. The GEN4000DF cannot be converted to natural gas.

Equipped with multiple safety features like AVR (Automatic Voltage Regulation), Automatic Low Oil Shut Off, a Spark Arrestor for safe operating in the woods and a Circuit Breaker to prevent overload. This generator is not recommended to be operated at high altitude above 3,000 ft so if you’re planning a skiing trip you may want to consider another generator in the list.

Included is (1) 5 Foot Propane Hose with Regulator, Wheels not included. The Sportsman GEN4000DF is backed by Sportsman’s 1-year limited Warranty.

Westinghouse WGen3600DF Dual Fuel (Gas and Propane) Electric Start Portable Generator 3600 Rated Watts & 4650 Peak Watts

Westinghouse is a serious Generator brand that has a full line of Generators available. The WGen3600DF is a great electric start Portable Dual Fuel Generator that runs using a 5.9 HP 212 cc Westinghouse 4-stroke OHV engine. The engine has a long lasting Cast Iron sleeve for increased durability.

The big 5.9 HP engine is able to pump out a huge 4650 starting watts and 3600 continual running watts using gasoline and 3240 running watts while using propane. The 4 Gallon gasoline tank has an easy to read fuel gauge and is equipped with a fuel selector that will allow you to switch between gasoline and propane without ever shutting off the Generator preventing any downtime associated with other models.

Included Outlets:

  • (1) 5-20 120V Duplex Outlet (Household Outlet)
  • (1) RV-Ready TT-30 30 Amp
  • (1) L5-30 30 Amp


  • 5.9 HP 212cc Westinghouse 4-Stroke
  • 4650 / 3600 Watts
  • Wireless Remote Stars /Electric Push Start
  • Fuel Selector Switch
  • Huge Selection of Outlets

The innovative control panel features outlets all the way from small 120V household outlets to a big TT-30 30 Amp outlet perfect for backing up and running any size RV or mobile home. The WGen3600DF is able to simultaneously power 12 lights in your home, a sump pump, fridge, tv, computer and still have power to spare!

Although heavy weighing 109 lbs Westinghouse has a built-in integrated extendable handle and rugged never-flat wheels to make maneuvering around a bit easier. Westinghouse really pulled out all the stops with this Generator as it’s equipped with a wireless remote start so you don’t even need to go outside to turn it on/off, it also features an electric push start and a manual recoil.

The WGen3600DF comes with everything needed to get going including (1) Charger, (1) Battery, (1) Propane Adapter Hose, (1) Funnel, (1) Jug of Oil, (1) Tool Kit, (1) Wireless Remote Fob and (1) Quick Start Guide.

Unlike the others featured this unit can be shipped and operated in the state of California as its EPA, CARB, and CSA Compliant and includes a long 3-Year Warranty.