By Miles SinclairUpdated November 2026
A dual fuel diesel generator lets you run on diesel-compatible fuel or, depending on the model, switch between gasoline and propane. That flexibility matters when fuel supply is uncertain, and it is one reason many homeowners and RV owners look at dual fuel units first. This list compares seven portable units from the product set we reviewed. Our selection looks at fuel options, output and outlet layout, electric start, transfer switch readiness, carbon monoxide protection, and what owners typically report about noise and running time. Nothing here is based on our own testing; the notes reflect manufacturer specifications and common owner feedback patterns.
Our top picks at a glance
- 1
TOP CHOICEBest overallWEN 6800-Watt Dual Fuel RV-Ready Electric Start Portable Inverter Generator (DF680iX)View on Amazon - 2
TOP CHOICEBest for quiet operationWEN Quiet and Lightweight 3600-Watt Dual Fuel RV-Ready Portable InvertView on Amazon - 3
TOP CHOICEBest for whole-home backupDuroMax XP13000HX 13,000-Watt Dual Fuel Portable GeneratorView on Amazon - 4
Best for home backup with transfer switchWestinghouse 6500 Watt Dual Fuel Home Backup Portable GeneratorView on Amazon - 5
Best high-output alternativeDuroMax XP13000EH 13,000-Watt Dual Fuel Portable GeneratorView on Amazon - 6
Best for 240V householdsWEN 8000-Watt 120V/240V Dual Fuel Portable Generator (DF8000X)View on Amazon - 7
Best budget pickWestinghouse 4650 Peak Watt Dual Fuel Portable GeneratorView on Amazon
Our Top Picks
Quick Comparison
| Product | Best for | Key feature |
|---|---|---|
| WEN 6800-Watt Dual Fuel RV-Ready Inverter Generator (DF680iX) | Overall balance of output and portability | Electric start, fuel shut-off, CO watchdog |
| WEN 3600-Watt Dual Fuel RV-Ready Inverter Generator (DF360iX) | Quiet operation and light loads | Inverter design, RV-ready outlet |
| DuroMax XP13000HX Dual Fuel Portable Generator | Whole-home backup | High output, transfer switch ready |
| Westinghouse 6500 Watt Dual Fuel Home Backup Generator | Home backup with transfer switch | 30A outlet, CO sensor |
| DuroMax XP13000EH Dual Fuel Portable Generator | Heavy-duty high output | Electric start, RV and emergency ready |
| WEN 8000-Watt 120V/240V Dual Fuel Portable Generator (DF8000X) | 240V households | 120V/240V output, transfer-switch ready |
| Westinghouse 4650 Peak Watt Dual Fuel Portable Generator | Light backup on a budget | RV-ready 30A outlet, CO sensor |
WEN 6800-Watt Dual Fuel RV-Ready Electric Start Portable Inverter Generator (DF680iX)
WEN 6800-Watt Dual Fuel RV-Ready Electric Start Portable Inverter Generator with Fuel Shut Off and CO Watchdog for Electric Vehicle Backup (DF680iX)
Best for: Overall balance of output and portability
This unit suits households that need more capacity than a small inverter but still want a machine they can move by hand or roll on a cart. It is also a reasonable fit for RV owners and anyone planning limited electric vehicle charging backup, as the listing describes.
Key specs:
- 6800-watt rated output, as stated in the listing name
- Dual fuel operation (gasoline and propane)
- Electric start
- Fuel shut-off and CO watchdog features
Pros:
- Electric start simplifies cold-weather use
- Inverter design is generally quieter than conventional open-frame generators
- CO watchdog adds an extra layer of safety
Cons:
- Heavier than the smaller WEN models
- Propane run time is typically shorter than gasoline at the same load
Bottom line: A strong all-round choice for homeowners who want more output than a small inverter without moving into full whole-home territory.
WEN Quiet and Lightweight 3600-Watt Dual Fuel RV-Ready Portable Inverter Generator (DF360iX)
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
Best suited to campers, tailgaters, and households powering a few essentials such as a refrigerator, lights, and phone chargers. Owners often report that the lower output keeps noise levels manageable in campgrounds.
Key specs:
- 3600-watt rated output, as stated in the listing name
- Dual fuel operation
- Inverter design
- Fuel shut-off and CO watchdog features
Pros:
- Lightweight and easy to transport
- Inverter output suits sensitive electronics
- Good match for RV and campsite use
Cons:
- Cannot run large appliances such as central air
- Limited capacity for whole-home backup
Bottom line: Choose this if quiet, light operation matters more than raw power.
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 backup
Designed for households that want to run a large share of their home during outages. The listing emphasizes transfer switch readiness, which is the usual route for connecting a portable unit to household circuits safely.
Key specs:
- 13,000-watt class output, as stated in the listing name
- Gas and propane operation
- Electric start
- Transfer switch ready
Pros:
- High output for larger household loads
- Electric start for convenience
- Transfer switch compatibility supports safe home connection
Cons:
- Large and heavy, requiring two people or a cart to move
- Noise levels are higher than inverter models at comparable output
Bottom line: A good fit for homeowners who need serious capacity and can accommodate its size and noise.
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 transfer switch
A practical option for homeowners who want a dedicated backup unit with a 30A outlet for connecting to a transfer switch and an RV-ready 30A receptacle for trailers.
Key specs:
- 6500-watt class output, as stated in the listing name
- Dual fuel operation
- 30A outlet, transfer switch ready
- CO sensor
Pros:
- Built-in CO sensor adds safety monitoring
- Outlet layout suits both home and RV use
- Good balance of output and manageable size
Cons:
- Not an inverter, so noise is higher than inverter models
- Requires a proper transfer switch installation
Bottom line: A sensible backup choice for homeowners who plan to wire the unit through a transfer switch.
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: Heavy-duty high output
Suited to users who need high capacity for whole-home or job-site power and are comfortable with a larger, louder machine.
Key specs:
- 13,000-watt class output, as stated in the listing name
- Gas and propane operation
- Electric start
- Transfer switch ready, RV and emergency ready
Pros:
- High capacity for demanding loads
- Electric start simplifies operation
- Flexible fuel choice
Cons:
- Heavy and bulky
- Louder than inverter alternatives
Bottom line: Best for those who prioritize output over quiet operation.
WEN 8000-Watt 120V/240V Dual Fuel Portable Generator (DF8000X)
WEN 8000-Watt 120V/240V Dual Fuel Portable Generator, Electric Start, 340cc, Transfer-Switch and RV-Ready with CO Watchdog (DF8000X)
Best for: 240V households
Useful for homes with 240V appliances such as well pumps, electric ranges, or larger air conditioners, provided the unit is sized and connected correctly.
Key specs:
- 8000-watt class output, as stated in the listing name
- 120V and 240V output
- Electric start
- 340cc engine, as stated in the listing name
- Transfer-switch and RV ready, CO watchdog
Pros:
- 240V output widens the range of compatible appliances
- Electric start and CO watchdog add convenience and safety
- Transfer-switch readiness supports home wiring
Cons:
- Heavier than the smaller WEN units
- Requires careful load calculation to avoid overloading
Bottom line: A strong pick for households that rely on 240V equipment during outages.
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: Light backup on a budget
A budget-oriented option for running a refrigerator, lights, and a few small devices during short outages, or for light RV use.
Key specs:
- 4650 peak watt rating, as stated in the listing name
- Gas and propane operation
- RV-ready 30A outlet
- CO sensor
Pros:
- Lower output keeps size and handling manageable
- CO sensor included
- Useful for RV and light home backup
Cons:
- Not suitable for high-draw appliances
- Peak rating differs from continuous rating, so check your running wattage
Bottom line: Pick this if you need basic backup power and want to keep the purchase modest in scope.
Buying Guide
Fuel Flexibility
Check which fuels the unit accepts and how each affects run time and output. Gasoline gives the most power in many designs, while propane is cleaner-burning and stores longer. Dual fuel models let you switch depending on supply.
Good picks for this: WEN 6800-Watt Dual Fuel RV-Ready Electric Start Portable Inverter Generator (DF680iX), Westinghouse 4650 Peak Watt Dual Fuel Portable Generator
Output and Running Watts
Add up the running watts of the loads you intend to power, then add surge capacity for motors. Compare that total to the unit’s continuous rating, not the peak figure, to avoid overloading.
Good picks for this: DuroMax XP13000HX 13,000-Watt Dual Fuel Portable Generator, WEN 8000-Watt 120V/240V Dual Fuel Portable Generator (DF8000X)
Noise Level and Engine Type
Inverter generators typically run quieter than conventional open-frame units because engine speed adjusts to load. If neighbors or campsites matter, an inverter is usually the better choice.
Good picks for this: WEN Quiet and Lightweight 3600-Watt Dual Fuel RV-Ready Portable Inverter Generator (DF360iX), WEN 6800-Watt Dual Fuel RV-Ready Electric Start Portable Inverter Generator (DF680iX)
Transfer Switch and Outlet Layout
If you plan to power household circuits, look for transfer switch readiness and the correct outlet, such as a 30A or 240V receptacle. Connection should be done by a qualified electrician.
Good picks for this: Westinghouse 6500 Watt Dual Fuel Home Backup Portable Generator, DuroMax XP13000HX 13,000-Watt Dual Fuel Portable Generator
Safety Features
Carbon monoxide is the main hazard with any generator. Look for CO sensors or watchdog features and an automatic fuel shut-off. Never run a generator indoors or in an attached garage, even with the door open.
Good picks for this: WEN 3600-Watt Dual Fuel RV-Ready Portable Inverter Generator (DF360iX), Westinghouse 6500 Watt Dual Fuel Home Backup Portable Generator
Size, Weight and Portability
Heavier units with higher output usually require a cart or two people to move safely. Consider where the generator will be stored and how often you will transport it, especially for RV or job-site use.
Good picks for this: WEN Quiet and Lightweight 3600-Watt Dual Fuel RV-Ready Portable Inverter Generator (DF360iX), Westinghouse 4650 Peak Watt Dual Fuel Portable Generator
Maintenance and Durability
Dual fuel units often need periodic carburetor and fuel-system attention, particularly if left with fuel in the tank. Electric start models reduce pull-starting strain, and regular oil changes extend engine life. Follow the manufacturer’s maintenance schedule.
Good picks for this: DuroMax XP13000EH 13,000-Watt Dual Fuel Portable Generator, WEN 8000-Watt 120V/240V Dual Fuel Portable Generator (DF8000X)
FAQ
What is a dual fuel diesel generator?
The term is often used loosely. Many dual fuel units run on gasoline and propane, while some are described as diesel-compatible. Check the manufacturer’s listing for exactly which fuels are supported before buying.
Can I run a dual fuel generator on propane instead of gasoline?
Yes, on models rated for propane. Propane typically produces less power than gasoline at the same setting, so run time and output may differ. Use the fuel the manual specifies.
How much power do I need for a home backup?
Start by listing essential loads and their running watts, then add motor surge. Choose a unit whose continuous rating covers that total with some margin. An electrician can help size a whole-home setup.
Is a transfer switch required?
For connecting a generator to household circuits, a transfer switch is the safe method because it prevents backfeeding the utility grid. Have it installed by a licensed electrician.
Are inverter dual fuel generators quieter?
Generally yes. Inverter designs adjust engine speed to demand, which usually reduces noise compared with conventional open-frame units at similar loads. Actual noise depends on load, distance and surroundings.
How should I store a dual fuel generator?
Store it in a dry, ventilated area away from living spaces. For gasoline, use fuel stabilizer or drain the tank before long storage. Propane cylinders should be stored upright and outdoors or in a well-ventilated area.
Can I run a generator in the garage?
No. Generators produce carbon monoxide that can build up quickly, even with the door open. Operate units outdoors at a safe distance from windows and doors.
Conclusion
For most homeowners, the WEN 6800-Watt Dual Fuel RV-Ready Electric Start Portable Inverter Generator (DF680iX) offers a balance of output, electric start and safety features. Buyers prioritizing quiet operation or light loads may prefer the WEN 3600-Watt model. For whole-home backup, the DuroMax XP13000HX and Westinghouse 6500 Watt units are built around transfer switch use, while the WEN 8000-Watt DF8000X suits 240V households. The Westinghouse 4650 Peak Watt is a modest option for light backup. Match the unit to your actual running load, noise tolerance and wiring plan.
Sources
- Guidance on generator sizing, safe operation and backup power planning (energy.gov)
- Carbon monoxide safety recommendations for portable generator use (cpsc.gov)
- Standards and fire-safety guidance relevant to generator installation (nfpa.org)
Related reading
- 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)
- WEN 6800 Dual Fuel Inverter Generator Review: Is It Worth It?
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.
