By Miles SinclairUpdated November 2026
A dual fuel gas generator lets you run on gasoline or propane, which matters when fuel supply is uncertain during outages or when you want flexibility on a jobsite or RV trip. Choosing one comes down to running capacity, outlet layout, noise level, fuel-switching convenience, and whether the unit supports a transfer switch. The picks below are ranked by how well each one matches those criteria, based on manufacturer specifications, brand reputation, and the patterns owners tend to report in reviews. None of these were tested in a lab or in our own hands; treat the specs as manufacturer claims and verify them before you buy.
Our top picks at a glance
- 1
TOP CHOICEBest overallWestinghouse 6500 Watt Dual Fuel Home Backup Portable GeneratorView on Amazon - 2
TOP CHOICEBest for quiet operationWEN DF360iX 3600-Watt Dual Fuel RV-Ready Portable Inverter GeneratorView on Amazon - 3
TOP CHOICEBest for RV and campingWestinghouse 4650 Peak Watt Dual Fuel Portable GeneratorView on Amazon - 4
Best for whole-home backupDuroMax XP13000HX 13,000-Watt Dual Fuel Portable GeneratorView on Amazon - 5
Best budget pickDuroMax XP5500HX 5,500-Watt Dual Fuel Portable GeneratorView on Amazon - 6
Best for high-output electric startDuroMax XP13000EH 13,000-Watt Dual Fuel Portable GeneratorView on Amazon
Our Top Picks
| Product | Best for | Key feature |
|---|---|---|
| WEN DF360iX 3600-Watt Dual Fuel Inverter Generator | Quiet operation and light loads | Inverter design with fuel shut-off and CO Watchdog |
| Westinghouse 4650 Peak Watt Dual Fuel Portable Generator | RV and camping | 30A RV-ready outlet and CO sensor |
| Westinghouse 6500 Watt Dual Fuel Home Backup Portable Generator | Home backup with a transfer switch | Transfer switch ready 30A outlet |
| DuroMax XP5500HX 5,500-Watt Dual Fuel Portable Generator | Budget-conscious buyers and mid-size loads | Electric start on gas and propane |
| DuroMax XP13000HX 13,000-Watt Dual Fuel Portable Generator | Whole-home power backup | High running capacity with transfer switch readiness |
| DuroMax XP13000EH 13,000-Watt Dual Fuel Portable Generator | High-output electric start needs | Electric start with whole-home backup capability |
Westinghouse 6500 Watt Dual Fuel Home Backup Portable Generator
Westinghouse 6500 Watt Dual Fuel Home Backup Portable Generator, Transfer Switch Ready 30A Outlet, RV Ready 30A Outlet, CO Sensor
Best for: Home backup with a transfer switch
This unit suits homeowners who want to power essential circuits during an outage and who plan to install a transfer switch. The 30A outlet and transfer-switch readiness make it a practical step up from smaller portable units.
Key specs
- 6500 watt rated output (per listing name)
- Dual fuel: gasoline and propane
- Transfer switch ready 30A outlet
- RV ready 30A outlet
- CO sensor
Pros
- Transfer switch compatibility supports hardwired home backup setups
- Dual fuel operation gives you a fallback when gasoline is hard to find
- CO sensor adds a safety layer for enclosed or semi-enclosed use
Cons
- Open-frame portable designs run louder than inverter models at similar output
- Heavier than inverter units, so it is harder to move by hand
Bottom line: A strong choice for homeowners who want transfer-switch backup and can accept the noise and weight that come with a conventional portable unit.
WEN DF360iX 3600-Watt Dual Fuel RV-Ready Portable Inverter Generator
WEN Quiet and Lightweight 3600-Watt Dual Fuel RV-Ready Portable Inverter Generator with Fuel Shut Off and CO Watchdog (DF360iX)
Best for: Quiet operation and light loads
This inverter model fits people who need to run phones, lights, a fridge or a small window unit without disturbing neighbors or campsite mates. Inverter designs generally produce cleaner power and lower noise than conventional open-frame generators.
Key specs
- 3600 watt rated output (per listing name)
- Dual fuel: gasoline and propane
- Inverter design
- Fuel shut-off feature
- CO Watchdog
Pros
- Inverter design typically runs quieter than conventional portable generators
- Fuel shut-off and CO Watchdog add useful safety features
- Lighter than most open-frame units, easier to transport
Cons
- 3600 watts is limited for whole-home or large appliance use
- Owners who need 240V output for heavy loads will need a larger unit
Bottom line: The best pick here for buyers who prioritize low noise and portability over raw capacity.
Westinghouse 4650 Peak Watt Dual Fuel Portable Generator
Westinghouse 4650 Peak Watt Dual Fuel Portable Generator, RV Ready 30A Outlet, Gas & Propane Powered, CO Sensor
Best for: RV and camping
This mid-size portable unit targets RV owners and campers who want to run air conditioning or several household circuits at a campsite. The 30A RV-ready outlet is the defining feature for this use.
Key specs
- 4650 peak watt rating (per listing name)
- Dual fuel: gasoline and propane
- RV ready 30A outlet
- CO sensor
Pros
- RV-ready 30A outlet matches common RV hookups
- Propane operation is convenient for long campsite stays
- CO sensor helps with safety around vehicles and tents
Cons
- Peak rating differs from continuous output, so check running wattage for your loads
- Conventional design is louder than inverter alternatives
Bottom line: A practical choice for RV owners who want a 30A outlet and dual fuel flexibility at a moderate price tier.
DuroMax XP13000HX 13,000-Watt Dual Fuel Portable Generator
DuroMax XP13000HX 13,000-Watt Dual Fuel Portable Generator – Gas & Propane, Electric Start, Whole Home Power Backup, Transfer Switch Ready, RV & Emergency Ready
Best for: Whole-home power backup
This high-output unit is aimed at households that need to run a large share of the home during an extended outage, with transfer switch installation as the intended path.
Key specs
- 13,000 watt class output (per listing name)
- Dual fuel: gasoline and propane
- Electric start
- Transfer switch ready
- RV and emergency ready
Pros
- Capacity is suited to whole-home or large-load backup
- Electric start is easier than recoil pulls on a unit this size
- Transfer switch readiness supports a permanent installation
Cons
- Heavy and bulky, so it is hard to reposition alone
- Noise and fuel consumption are high at full load
Bottom line: The right fit for owners who need serious capacity and can position the unit outdoors, well away from living spaces.
DuroMax XP5500HX 5,500-Watt Dual Fuel Portable Generator
DuroMax XP5500HX 5,500-Watt Dual Fuel Portable Generator – Gas & Propane, Electric Start, RV & Emergency Ready
Best for: Budget-conscious buyers and mid-size loads
This mid-size unit suits buyers who need enough power for a refrigerator, sump pump, well pump and some lighting without moving up to the largest capacity class.
Key specs
- 5,500 watt class output (per listing name)
- Dual fuel: gasoline and propane
- Electric start
- RV and emergency ready
Pros
- Electric start simplifies cold-weather starting
- Dual fuel gives a fallback when one fuel is unavailable
- Sized for common essential-circuit loads
Cons
- Not sufficient for central air or large electric heat
- Conventional design runs louder than inverter models
Bottom line: A sensible choice for households that want essential-load backup and electric start without paying for capacity they will not use.
DuroMax XP13000EH 13,000-Watt Dual Fuel Portable Generator
DuroMax XP13000EH 13,000-Watt Dual Fuel Portable Generator – Gas & Propane, Electric Start, Whole Home Backup Power, Transfer Switch Ready, RV & Emergency Ready
Best for: High-output electric start needs
This unit is for users who want 13,000-watt-class output with electric start and are willing to manage its size and noise for the sake of capacity.
Key specs
- 13,000 watt class output (per listing name)
- Dual fuel: gasoline and propane
- Electric start
- Whole-home backup power and transfer switch ready
- RV and emergency ready
Pros
- High capacity with electric start for convenience
- Propane option helps with long storage periods
- Transfer switch readiness supports hardwired backup
Cons
- Heavy enough that two people are advisable for moving
- Loud at full load, so placement and sound barriers matter
Bottom line: A good pick for households that need high output and electric start, provided they have a suitable outdoor location for the unit.
Buying Guide
Running Capacity and Starting Watts
Add up the running watts of the circuits you plan to power, then add the starting surge of motors such as refrigerators, well pumps and air conditioners. Compare that total against the generator’s rated running watts, not its peak rating. A generator sized with 20 to 25 percent headroom above your calculated load generally runs more comfortably.
Good picks for this: DuroMax XP13000HX 13,000-Watt Dual Fuel Portable Generator, Westinghouse 6500 Watt Dual Fuel Home Backup Portable Generator
Noise Level and Engine Type
Inverter generators typically produce cleaner power and run quieter than conventional open-frame designs at similar output. Manufacturers usually publish decibel ratings at a stated distance and load, so compare figures measured under the same conditions. Expect the largest units to be the loudest.
Good picks for this: WEN DF360iX 3600-Watt Dual Fuel Portable Inverter Generator, Westinghouse 4650 Peak Watt Dual Fuel Portable Generator
Outlet Types and Transfer Switch Readiness
Check whether the unit has 120V household outlets, 240V or 30A outlets, and a transfer switch ready output. A transfer switch lets you connect the generator to your home’s electrical panel safely, which requires a licensed electrician to install. Plug-in connections are simpler but limit what you can power.
Good picks for this: Westinghouse 6500 Watt Dual Fuel Home Backup Portable Generator, DuroMax XP13000EH 13,000-Watt Dual Fuel Portable Generator
Fuel Options and Runtime
Dual fuel units run on gasoline or propane. Gasoline offers higher energy density per gallon for some models, while propane stores indefinitely and burns cleaner, which makes it useful for emergency reserves. Check the manufacturer’s runtime figures for each fuel at a stated load, because runtime drops sharply when you use the full rated output.
Good picks for this: Westinghouse 4650 Peak Watt Dual Fuel Portable Generator, DuroMax XP5500HX 5,500-Watt Dual Fuel Portable Generator
Portability and Weight
Units above roughly 10,000 watts are heavy and often need two people or a hand truck. Inverter models in the mid-range are lighter and easier to carry to a campsite or up a set of stairs. Weigh how often you will move the unit before choosing a larger model.
Good picks for this: WEN DF360iX 3600-Watt Dual Fuel Portable Inverter Generator, DuroMax XP5500HX 5,500-Watt Dual Fuel Portable Generator
Safety Features
Look for carbon monoxide sensors or shut-off systems, low-oil shutdown and overload protection. Never run any gasoline or propane generator inside a home, garage, basement or enclosed space, even with the doors open. Keep the unit at least 20 feet from windows and doors as a common safety guideline.
Good picks for this: WEN DF360iX 3600-Watt Dual Fuel Portable Inverter Generator, Westinghouse 4650 Peak Watt Dual Fuel Portable Generator
Electric Start and Maintenance
Electric start is easier than a recoil pull, especially in cold weather or for users with limited upper-body strength. Routine maintenance, such as oil changes, air filter checks and spark plug inspection, extends engine life. Follow the owner’s manual schedule and consult a qualified technician for repairs.
Good picks for this: DuroMax XP5500HX 5,500-Watt Dual Fuel Portable Generator, DuroMax XP13000EH 13,000-Watt Dual Fuel Portable Generator
FAQ
Can a dual fuel gas generator run on either gasoline or propane?
Yes. Dual fuel models are designed to run on either fuel. You switch between them using a fuel selector, and the engine’s carburetor or fuel system is set up to handle both. Check the owner’s manual for the exact switching procedure and for any performance differences between the two fuels.
Is propane or gasoline better for a dual fuel generator?
It depends on your use. Propane stores almost indefinitely and burns cleaner, which suits standby reserves. Gasoline is easier to find in some areas and often delivers longer runtime per unit of fuel. Many owners keep both on hand so they have a fallback.
Do I need a transfer switch to power my house?
Yes, if you want to connect the generator to your home’s wiring. Plugging a generator directly into a wall outlet can backfeed power onto utility lines and endanger line workers. A transfer switch installed by a licensed electrician is the safe method. Extension cords are only for powering specific appliances directly.
How far should a generator be from my house?
Many safety guidelines recommend placing a gasoline or propane generator at least 20 feet from doors, windows and vents, with the exhaust pointed away from the building. Never run it in an attached garage or any enclosed space. Consult the owner’s manual and local codes for specific requirements.
How loud is a dual fuel gas generator?
Noise depends on the engine type, load and distance. Inverter models are generally quieter than conventional open-frame units. Compare decibel ratings the manufacturer publishes at a stated distance and load, since figures measured differently are not directly comparable.
Can a dual fuel generator power central air conditioning?
Possibly, but only if the generator’s running wattage exceeds the air conditioner’s running and starting requirements. Central air units have high starting surges, so check the compressor’s specifications and consider a soft starter. A licensed electrician can help confirm sizing.
How often should I run my dual fuel generator?
Most manufacturers recommend starting the generator periodically, often monthly, and running it under load for a short period to keep the engine and fuel system in working order. Follow the owner’s manual schedule for oil, filters and fuel stabilizer use.
Conclusion
For most homeowners planning transfer-switch backup, the Westinghouse 6500 Watt Dual Fuel Home Backup Portable Generator is the strongest fit on the list based on its listed features. Buyers who prioritize quiet operation and portability will find the WEN DF360iX better suited, though with lower capacity. The Westinghouse 4650 Peak Watt suits RV and camping use, while the DuroMax XP5500HX offers a budget-friendly path to essential loads. The DuroMax XP13000HX and XP13000EH target whole-home and high-output needs for owners who can manage their size and noise. Always verify specifications against the manufacturer’s documentation and consult a licensed electrician for any permanent installation.
Sources
- Guidance on home backup power planning, generator sizing and fuel considerations (energy.gov)
- Consumer safety information on carbon monoxide hazards and safe generator placement (cpsc.gov)
- Standards and safety guidance on portable generator installation and electrical connections (nfpa.org)
Related reading
- 5 Best Natural Gas Dual Fuel Generator Models for Home Backup (2026)
- Why Does My Dual Fuel Generator Carb Keep Clogging? Causes and Fixes
- What Is a 240V Dual Fuel Generator and Is It Right for Home Backup?
- Westinghouse Dual Fuel Generator: Setup, Quieting and Fuel Tips (2026)
About Miles Sinclair
Miles Sinclair is part of our editorial team and reviews and edits our generators & noise guides, checking product details against manufacturer specifications and owner feedback.
