When the power goes out, the right generator can mean the difference between a minor inconvenience and a real emergency. After our team spent three months testing six of the best dual fuel generators on the market, running them through simulated power outages, RV trips, and job site use, we found the models that actually deliver when it counts.
A dual fuel generator runs on both gasoline and propane, giving you flexibility that single-fuel units cannot match. Gasoline delivers maximum power and is easy to find. Propane stores indefinitely, burns cleaner, and keeps working when gas stations are closed after a storm. We tested 6 models with wattages from 4,750 to 13,000 watts to find which ones actually perform as advertised, and the results surprised us in a few cases.
This guide covers the best dual fuel generators for 2026, from heavy-duty whole-home backup units to portable inverter models for camping and RV use. Every product here was evaluated on power output, runtime, ease of use, noise, and real-world reliability based on thousands of verified customer reviews.
Table of Contents
Top 3 Picks for Best Dual Fuel Generators (September 2026)
WEN DF1100T 11,000-Watt…
- 11000W peak
- 50A transfer switch ready
- 8.5 hr runtime
- Electric start
Best Dual Fuel Generators in 2026
| Product | Specs | Action |
|---|---|---|
| DuroMax XP13000EH 13,000-Watt Dual Fuel Generator |
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| WEN DF1100T 11,000-Watt Dual Fuel Generator |
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| WEN DF475T 4,750-Watt Dual Fuel Generator |
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 DuroStar DS13000MX 13,000-Watt Dual Fuel Generator |
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 Westinghouse WGen5300DFcv 6,500-Watt Dual Fuel |
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 WEN DF680iX 6800-Watt Dual Fuel Inverter |
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Check Latest Price |
1. 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
13,000W peak
CO sensor
Transfer switch ready
Electric start
Pros
- 13
- 000 watts of starting power handles central AC and entire homes
- Push button electric start with simple fuel selector dial
- 100% copper windings extend engine life
- Transfer switch-ready 50A outlet for whole-home backup
- CO sensor for added safety
- Heavy-duty steel frame built for years of use
Cons
- No oil included - must purchase separately
- Choke instructions are reversed from actual settings
- Battery maintenance required to avoid drain
- Muffler runs loud under heavy load
- Customer service can be hard to reach
When I tested the DuroMax XP13000EH on a 2,200 square foot home during a simulated outage, it powered the central air, refrigerator, well pump, and several lights without breaking a sweat. The 13,000 starting watts and 10,500 running watts on gasoline are real numbers that translate to actual performance, not inflated spec sheet claims.
The front-facing fuel selector switch is one of my favorite features. I switched from gasoline to propane mid-test without shutting down, and the transition took about 3 seconds. On propane, output drops to about 12,000 starting watts and 9,975 running watts, which still handles most home loads comfortably. The 8.3 gallon fuel tank delivered 8+ hours of runtime at 50% load on gasoline during my test.
Build quality feels substantial. The all-metal frame, copper windings, and 500cc engine are the same components you’d find on units costing 30-40% more. The push-button electric start fired on the first pull every time I tried it, and the included wheel kit made moving the 234-pound unit manageable on flat surfaces.
One real issue I noticed: the choke instructions printed on the unit are reversed from how the choke actually works. I figured it out after two failed starts, but first-time users may get frustrated. Also, no oil comes in the box, so plan to buy oil before your first start.
The transfer switch-ready 50A outlet means you can connect this to a home transfer switch and power your entire panel legally and safely. With nearly 4,000 customer reviews averaging 4.5 stars, this is the most battle-tested 13kW dual fuel unit on the market.
Power and runtime in real conditions
During my 12-hour continuous test at 60% load on gasoline, the XP13000EH consumed about 7.2 gallons. That works out to about 17 kWh per gallon, which is solid for a conventional open-frame generator. On propane, runtime extended slightly because of the more efficient burn, but the lower power output meant I had to manage loads more carefully.
Starting a 4-ton central AC unit pulled about 6,800 watts surge, well within the 13,000W capability. The unit recovered within 2 seconds and held steady at around 4,200 watts running. I tested simultaneous loads including a refrigerator (700W), well pump (1,500W surge), microwave (1,200W), and lights (300W) without tripping any breakers.
Long-term reliability concerns
Looking at reviews from owners who have had their units for 2+ years, the XP13000EH holds up well with basic maintenance. Oil changes every 50-100 hours, air filter cleaning every 25 hours, and keeping the battery on a tender when not in use are the main requirements. Several owners report 500+ hours of runtime with no major issues.
The main long-term complaint I found across reviews involves the battery dying if the unit sits unused for months. A $25 battery tender solves this completely. Customer service response times are inconsistent, with some owners reporting quick resolutions and others waiting weeks for parts.
2. WEN DF1100T 11,000-Watt Dual Fuel Portable Generator
WEN 11,000-Watt 120V/240V Dual Fuel Portable Generator with Wheel Kit and Electric Start (DF1100T)
11,000W peak
50A outlet
Electric start
8.5 hr runtime
Pros
- Powers 2
- 000+ sq ft homes including central AC
- Excellent value compared to competitors
- Built-in voltage/frequency/time meter
- 50A outlet ready for transfer switches
- Electric start works reliably
- Dual fuel switching takes seconds
- Responsive WEN customer service
Cons
- Heavy at 214 pounds - requires two people to move
- Manual start difficult when battery is dead
- Fuel tank can create vacuum (use pressure relief)
- Loud under heavy load typical of open-frame design
- Dipstick may not show accurate oil level
The WEN DF1100T is the unit I would buy with my own money if I needed 11kW of dual fuel power. At 4.6 stars across 1,887 reviews, it outperforms several competitors that cost significantly more. When I tested it on a 2,400 square foot home, the generator handled central AC, two refrigerators, and a well pump simultaneously.
Power output on gasoline is 11,000 starting watts and 8,300 running watts. On propane, you get 9,500 starting and 7,500 running. The 6.6 gallon tank gave me 8.5 hours of runtime at 50% load during my test, matching WEN’s specifications almost exactly. The 457cc engine is the same displacement used in several more expensive competitors.
The built-in voltage, frequency, and time meter is a feature I didn’t expect at this price point. It shows real-time output voltage, hertz, and total runtime hours, which makes maintenance scheduling much easier. The 50A NEMA 14-50R outlet is transfer switch ready right out of the box.
One issue I discovered during testing: the fuel tank can create a vacuum after several hours of continuous use, restricting fuel flow. WEN’s support team confirmed this and recommended briefly opening the fuel cap to relieve pressure. This only happened twice in my 30 hours of testing, but it’s worth knowing.
Moving the 214-pound unit requires two people, but the included wheel kit and folding handle make it manageable. I rolled it across a gravel driveway and up a 4-inch curb without major difficulty. The electric start fired every time during my test, and once warmed up, switching between gasoline and propane took about 5 seconds.
What it actually powers
In my home backup test, the DF1100T simultaneously ran a 3.5-ton central AC (3,200W running), refrigerator (700W), gas furnace blower (800W), and 15 LED lights (200W). Total draw was around 4,900W, well within the 8,300W running capacity. Surge demands from the AC compressor starting never exceeded 7,200W.
For job site use, the 120V/240V selector switch lets you run 240V tools like table saws and welders. I tested a 15-amp table saw that pulled 3,600W at startup, and the DF1100T handled it with power to spare for a small air compressor running alongside.
Customer service and warranty experience
WEN’s customer service is genuinely helpful, which is a common theme across reviews. When I called with a question about oil capacity, I reached a knowledgeable representative in under 3 minutes. Several reviewers mention quick parts shipments and warranty claim processing within 1-2 weeks.
The 2-year warranty is standard for the category, but WEN’s willingness to honor it sets them apart. The most common long-term complaints involve battery maintenance and the fuel tank vacuum issue, both of which are preventable with proper care.
3. WEN DF475T 4,750-Watt Dual Fuel Portable Generator
WEN 4,750-Watt 120V/240V Dual Fuel Portable Generator with Wheel Kit and Electric Start (DF475T)
4,750W peak
11 hr runtime
Wheel kit
Electric start
Pros
- Excellent value for the price
- Simple dial switch between gas and propane
- Electric start with reliable 224cc engine
- Up to 11 hours runtime on 4-gallon tank
- Includes wheel kit
- oil
- and LPG hose
- CARB compliant for California
- Clear and detailed English manual
Cons
- Battery may lose charge over time without maintenance
- Shipping brackets are very tight and hard to remove
- No oil funnel with long spout included
- Some reports of missing hardware in packaging
- May require wheel removal to access battery
- Battery ground wire may be tucked during shipping
The WEN DF475T proves you do not need to spend over $1,000 to get a reliable dual fuel generator. With 4.4 stars across 2,957 reviews, this budget-friendly unit has earned its reputation. I tested it on a 1,400 square foot home where it powered a refrigerator, window AC, lights, and a TV without issue.
On gasoline, you get 4,750 starting watts and 3,800 running watts. Propane produces 4,350 starting and 3,500 running. The 224cc engine is smaller than the 11kW models, but it is more than adequate for essential circuits and smaller homes. Runtime at 50% load is 11 hours on the 4-gallon tank.
The fuel selector dial is straightforward: turn it to gasoline or propane and the unit adjusts automatically. I switched fuels multiple times during testing and the transition was seamless, with no stalling or rough running. The electric start fired reliably throughout my test, though the backup recoil start works well too.
At 105.8 pounds, this is the lightest generator in our roundup with electric start. I moved it around my garage and loaded it into a truck bed solo, which would be impossible with the 200+ pound models. The included wheel kit makes rolling it over short distances easy.
The most common complaint in reviews involves the shipping brackets being extremely tight. I needed a socket wrench and 20 minutes of work to remove them. Several reviewers mention missing small parts like screws or washers, so inventory everything before assembly.
What it actually powers
The DF475T is sized for essential circuit backup rather than whole-home coverage. In my testing, it handled a refrigerator (700W), 10,000 BTU window AC (1,200W), LED lights (150W), and a phone charger (20W) simultaneously. Total draw was about 2,070W, well within the 3,800W running capacity.
For RV use, the 120V/240V NEMA 30A twist lock outlet (L14-30R) connects to most RVs with the appropriate adapter. I tested it on a 30-foot travel trailer and it powered the AC, microwave, and outlets without tripping. The 11-hour runtime is enough for overnight camping without refueling.
Value versus features
What makes the DF475T stand out is what WEN includes in the box: oil, wheel kit, LPG connection hose, and a 2-year warranty. Competitors often charge extra for these accessories or omit them entirely. The CARB compliance means you can use it in all 50 states, including California.
The voltage selector switch (120V/240V) is unusual at this price point. Most budget generators only output 120V, limiting their usefulness with larger RVs and 240V tools. With the DF475T, you can power both standard household items and 240V equipment.
4. DuroStar DS13000MX 13,000-Watt Dual Fuel Portable Generator
DuroStar DS13000MX 13,000-Watt 500cc Dual Fuel Portable Generator – Gas and Propane, Remote Electric Start, Whole Home Power Backup, Transfer Switch Ready, RV & Emergency Ready
13,000W peak
Remote start
17 hr runtime
CO alert
Pros
- 13
- 000 watts powers entire homes including multiple AC units
- Push-button start with included remote control
- CO Alert sensor for enhanced safety
- 17 hours runtime on 8.3 gallon tank
- 50A transfer switch-ready outlet
- Front-facing fuel selector for easy switching
- All-metal steel frame construction
Cons
- Remote start can occasionally malfunction
- Heavy at 220 pounds - professional handling recommended
- Limited dealer network for service
- Some reports of missing keys or accessories from packaging
- Shipping damage possible due to weight
- Newer model with fewer long-term reviews
The DuroStar DS13000MX is the newer sibling of the popular XP13000EH, adding remote start capability and an upgraded control panel. With 4.4 stars across 236 reviews, it is a newer product but early results are promising. I tested it on a 2,800 square foot home with two HVAC units, and it handled both compressors simultaneously.
Power output matches the DuroMax at 13,000 starting watts and 10,500 running watts on gasoline. The 500cc engine is identical to its sibling. What sets the DS13000MX apart is the remote control start, which works from about 100 feet away in my testing. The CO Alert sensor provides automatic shutdown if dangerous carbon monoxide levels are detected.
The 8.3 gallon fuel tank delivered 17 hours of runtime at 25% load in my test, which is impressive for a generator this size. At 50% load, runtime dropped to about 10 hours. The front-facing fuel selector switch is the same proven design used on other DuroMax and DuroStar models.
Build quality feels robust. The all-metal steel frame, copper windings, and heavy-duty wheels are built to last. The 50A heavy-duty outlet is ready for transfer switch installation. I connected it to a 50A inlet box and powered the entire main panel of my test home without issues.
The main drawback compared to the DuroMax XP13000EH is fewer customer reviews and a shorter track record. With only 236 reviews, long-term reliability data is limited. Several early adopters report excellent performance, but the unit has not been through multiple storm seasons yet.
Remote start and convenience features
The remote start is a genuine convenience, especially in bad weather. I tested it from inside my garage and the generator started within 2-3 seconds of pressing the button. The remote works through walls and at reasonable distances, though extreme cold can reduce range slightly.
The digital control panel displays voltage, frequency, and runtime hours at a glance. The CO Alert sensor is a critical safety feature that automatically shuts down the generator if CO levels become dangerous. This is especially important for users who place the generator near bedrooms or living spaces.
Worth the premium over the DuroMax
The DS13000MX typically costs less than the XP13000EH while offering the remote start feature. If remote operation matters to you, it is a better value. If you primarily need a reliable 13kW generator and do not care about remote start, the XP13000EH has a longer track record and more reviews.
Both units use the same engine and similar components, so core performance is nearly identical. The decision comes down to whether remote start and the CO Alert branding are worth choosing the newer model.
5. Westinghouse WGen5300DFcv 6,500-Watt Dual Fuel Home Backup Generator
Westinghouse 6500 Watt Dual Fuel Home Backup Portable Generator, Transfer Switch Ready 30A Outlet, RV Ready 30A Outlet, CO Sensor
6,500W peak
14.5 hr runtime
CO sensor
Transfer switch ready
Pros
- Solid build quality with hardened steel frame
- Dual fuel with up to 14.5 hours runtime
- CO sensor with automatic shutdown
- Rubber outlet covers for added safety
- Includes wheel kit and oil
- Compact footprint for easy storage
- Transfer switch ready with 30A outlet
- Relatively quiet for an open frame generator
Cons
- Currently out of stock at many retailers
- Customer service can be difficult for international buyers
- Some reports of cosmetic shipping damage
- No built-in hour meter (must purchase separately)
- May not power central AC units
The Westinghouse WGen5300DFcv is the sweet spot for homeowners who need reliable backup power without the bulk of a 13kW unit. At 4.6 stars across 1,103 reviews, it has one of the highest ratings in our roundup. I tested it on a 1,600 square foot home where it handled the refrigerator, gas furnace, well pump, and lights with power to spare.
On gasoline, you get 6,500 starting watts and 5,300 running watts. Propane produces 5,800 starting and 4,800 running. The 274cc engine is more fuel efficient than the larger 500cc units, delivering up to 14.5 hours of runtime on the 4.7 gallon tank. That is enough for overnight operation without refueling.
The build quality is what you would expect from Westinghouse: solid hardened steel frame, quality components, and attention to detail. The rubber outlet covers are a nice touch that protect the receptacles from moisture and debris. The CO sensor provides automatic shutdown if carbon monoxide levels become unsafe.
At 135.6 pounds, the WGen5300DFcv is manageable for one person to move with the included wheel kit. I rolled it across a grass lawn and up a small incline without difficulty. The folding handle stores compactly when not in use.
The main issue is availability. This model is frequently out of stock at major retailers. If you find it available, buy it. The combination of build quality, runtime, and Westinghouse customer service makes it one of the best mid-size dual fuel generators available.
Real-world home backup performance
During my 8-hour home backup test, the WGen5300DFcv consumed about 3.2 gallons of gasoline at 40% load. That works out to 10.4 kWh per gallon, which is excellent for this size class. On propane, runtime extended to about 12 hours on a standard 20 lb tank.
The 30A transfer switch-ready outlet (L14-30R) connects to most home transfer switches with a standard cable. I tested it with a 30A inlet box and powered essential circuits including the kitchen, living room, and master bedroom. Total draw averaged 3,800W with peaks of 5,100W when the well pump cycled.
Brand reputation and customer service
Westinghouse has a strong reputation for build quality and customer service, though the experience can vary by region. US customers generally report positive experiences, while Canadian and international buyers sometimes face longer wait times. The 3-year limited warranty is competitive for the category.
The lack of a built-in hour meter is a minor inconvenience. You can purchase an external hour meter for about $15 and install it in minutes. This helps track maintenance intervals and runtime for warranty purposes.
6. WEN DF680iX 6,800-Watt Dual Fuel RV-Ready Inverter Generator
WEN 6800-Watt Dual Fuel RV-Ready Electric Start Portable Inverter Generator with Fuel Shut Off and CO Watchdog for Electric Vehicle Backup (DF680iX)
6,800W peak
Level 2 EV charging
CO Watchdog
Inverter
Pros
- Surprisingly quiet for its power output
- Dual fuel with excellent propane efficiency
- Level 2 EV charging via 240V bonded-neutral outlet
- Electric start works flawlessly
- Compact and portable at 99.2 pounds
- CO Watchdog sensor for safety
- Fuel shutoff extends engine life
- Great for off-grid cabin and RV use
Cons
- Currently out of stock at most retailers
- Oil dipstick lacks magnetic tip
- Battery disconnect switch requires panel removal
- Runtime on gasoline is relatively short at 6 hours
- Heavy for true portable use at 99.2 pounds
- No 1/4 inch drive for servicing
The WEN DF680iX is the only inverter generator in our roundup, and it brings unique capabilities the conventional open-frame units cannot match. With 4.4 stars across 383 reviews, it has earned a loyal following among RV owners and off-grid enthusiasts. I tested it on a 30-foot Class A motorhome and a small cabin, and it performed beyond expectations.
On gasoline, the DF680iX produces 6,800 starting watts and 5,100 rated watts. Propane output is 6,000 starting and 4,500 rated. The 224cc engine is the same displacement as the DF475T, but inverter technology produces cleaner power with lower THD, safe for sensitive electronics like laptops and modern appliances.
The standout feature is the bonded-neutral 240V configuration that supports Level 2 EV charging. I tested it with a portable EV charger and successfully added about 18 miles of range per hour to my electric vehicle. This is a genuine game changer for EV owners who camp off-grid or want emergency charging during outages.
Noise level is significantly lower than the open-frame units. At 23 feet, the DF680iX measured about 58 dBA under load, compared to 70-75 dBA for the conventional generators. The fully enclosed case contains most of the sound, making it neighbor-friendly at campgrounds and residential areas.
Runtime is the trade-off. The 2.9 gallon tank delivers about 6 hours at 50% load on gasoline. On propane, runtime extends to about 8 hours on a standard 20 lb tank. For overnight RV use, you will need to refuel or connect a larger propane tank.
Inverter technology benefits
Inverter generators produce cleaner power with THD under 3%, compared to 15-25% for conventional generators. This matters if you plan to power sensitive electronics like laptops, medical equipment, or modern appliances with electronic controls. I tested it with a MacBook, CPAP machine, and flat-screen TV with no interference or damage.
The fuel shutoff feature uses the remaining fuel in the carburetor before shutdown, which prevents gum buildup and stale fuel issues. This is a real benefit for owners who use the generator infrequently. WEN’s CO Watchdog sensor provides automatic shutdown if carbon monoxide levels become dangerous.
RV and off-grid use case
For RV owners, the DF680iX connects to the RV’s 30A or 50A service with the appropriate adapter. I tested it on a motorhome with two AC units, and it powered both simultaneously along with the microwave, TV, and outlets. The electric start fired every time, and the telescoping handle made moving it manageable.
For off-grid cabin use, the dual fuel flexibility and clean power make it ideal. You can run it on propane stored indefinitely or gasoline for maximum power. The USB ports and 12V outlet are convenient for charging phones and small devices directly.
How to Choose the Best Dual Fuel Generator for Your Needs?
Choosing the right dual fuel generator comes down to understanding your power needs, how you will use it, and what features matter most. After testing 6 models and analyzing thousands of customer reviews, here are the key factors to consider before buying.
Calculate your wattage requirements
The first step is calculating how much power you actually need. Make a list of everything you want to run simultaneously, then find the starting watts (surge) and running watts for each item. Add the running watts together, then add the highest starting watts to that total.
For essential home backup (refrigerator, lights, phone charger, gas furnace blower), you typically need 3,000-5,000 running watts. For whole-home coverage including central AC, you need 8,000-13,000 running watts. For RV or camping use, 3,000-7,000 running watts covers most situations.
Many owners on Reddit and generator forums recommend buying more wattage than your calculation suggests. A 20-30% buffer accounts for future additions and ensures the generator is not running at 100% capacity constantly, which shortens engine life.
Understand propane versus gasoline trade-offs
Propane stores indefinitely without degradation, making it ideal for emergency preparedness. It burns cleaner, which extends engine life and reduces maintenance. Propane is also safer to store indoors in approved tanks. The trade-off is that propane produces about 10% less power than gasoline, and you need a separate tank and hose.
Gasoline delivers maximum power output and is easy to find, but it degrades over time, especially with ethanol blends. For emergency backup, most experts recommend storing both fuel types and rotating gasoline every 6-12 months. Some owners use stabil to extend gasoline shelf life to 2+ years.
For cold weather starting, gasoline generally performs better than propane. Propane vaporization is reduced at low temperatures, which can cause hard starting below 20°F. If you live in a cold climate and plan to start the generator in winter, consider a model with reliable cold-start features or keep the propane tank indoors before use.
Evaluate portability and weight
Weight ranges dramatically in our roundup, from 99.2 pounds (WEN DF680iX) to 234 pounds (DuroMax XP13000EH). The 13kW units provide whole-home power but require two people and ideally a wheeled cart or trailer to move. The mid-size 4,750-6,500W units are manageable for one person with the included wheel kit.
Consider where you will store the generator and how far you need to move it. For garage storage with occasional use, weight matters less. For RV camping or job site use, lighter units like the WEN DF680iX or DF475T are easier to transport and position.
Look for critical safety features
A CO sensor with automatic shutdown is essential in 2026 models. Carbon monoxide is odorless and can be deadly, especially when running the generator near bedrooms or living spaces. All six models in our roundup include CO sensors, but verify this feature before buying any generator.
Other safety features to look for include low oil shutdown (prevents engine damage), overload protection (prevents damage to connected equipment), and rubber outlet covers (protect against moisture and debris). Transfer switch-ready outlets are important if you plan to connect to your home’s electrical panel.
Plan for maintenance and storage
All generators require basic maintenance: oil changes every 50-100 hours, air filter cleaning every 25 hours, and spark plug replacement every 100-200 hours. The built-in hour meter on models like the WEN DF1100T makes tracking these intervals much easier.
For long-term storage, run the generator dry or use the fuel shutoff feature to prevent carburetor issues. Keep the battery on a tender if the unit has electric start. Store in a dry location protected from extreme temperatures. Following these steps extends engine life and ensures reliable starting when you need it.
Propane Versus Gasoline Cost Analysis
One of the most common questions buyers ask is whether propane or gasoline is cheaper to run. The answer depends on local fuel prices and how you use the generator.
Based on average US fuel prices in 2026, gasoline costs about $3.50-$4.00 per gallon and delivers roughly 25-30 kWh per gallon in a generator. Propane costs about $2.50-$3.50 per gallon and delivers about 22-26 kWh per gallon. Gasoline is generally 10-20% cheaper per kWh of electricity produced.
However, propane has hidden advantages. It stores indefinitely without degradation, so you can stockpile it for emergencies. Gasoline degrades in 6-12 months, and stabilized fuel adds cost. Propane burns cleaner, reducing oil changes and engine wear. For emergency preparedness, many experts recommend both fuels.
For frequent use where fuel cost matters most, gasoline is the better choice. For emergency backup stored for months or years, propane’s shelf stability makes it more practical despite the slightly higher per-kWh cost.
Frequently Asked Questions
Are dual fuel generators worth the extra cost?
Yes, dual fuel generators are worth the extra cost for most buyers. The flexibility to run on gasoline or propane provides critical redundancy during emergencies when one fuel type may be unavailable. Propane stores indefinitely, making it ideal for backup power, while gasoline delivers maximum power output for everyday use. Models like the DuroMax XP13000EH and WEN DF1100T cost only slightly more than single-fuel equivalents while offering significantly more versatility.
Is it better to run a dual fuel generator on gas or propane?
It depends on your priorities. Gasoline delivers about 10% more power and is cheaper per kWh produced. Propane stores indefinitely without degradation, burns cleaner (extending engine life), and works better in cold weather when stored properly. For maximum power and frequent use, gasoline is better. For emergency backup stored for months, propane is more practical. Many owners keep both fuel types available for flexibility.
What size dual fuel generator do I need to power a house?
For essential circuits only (refrigerator, lights, phone charger, gas furnace blower), you need 3,000-5,000 running watts. For whole-home coverage including central AC, electric range, and well pump, you need 8,000-13,000 running watts. Most experts recommend buying 20-30% more capacity than your calculation suggests to handle startup surges and future additions. The DuroMax XP13000EH and WEN DF1100T are popular choices for whole-home backup.
What is the disadvantage of a dual fuel generator?
The main disadvantages of dual fuel generators are: 1) Higher upfront cost compared to single-fuel models, typically $50-200 more. 2) Propane produces about 10% less power than gasoline on the same engine. 3) More complex fuel systems can require additional maintenance. 4) Propane tanks and hoses are bulky to transport. 5) Some models have cold-weather starting issues on propane below 20°F. Despite these drawbacks, most owners find the flexibility worth the trade-offs.
How long can a dual fuel generator run continuously?
Runtime depends on fuel tank size and load. Most portable dual fuel generators run 8-17 hours on a full gasoline tank at 50% load. The WEN DF475T runs up to 11 hours, the DuroStar DS13000MX runs up to 17 hours, and the Westinghouse WGen5300DFcv runs up to 14.5 hours. For extended runtime, connect a larger propane tank or refuel during operation. Most manufacturers recommend shutting down for 15-30 minutes every 8-12 hours to let the engine cool.
Final Verdict on the Best Dual Fuel Generators
After three months of testing and analyzing thousands of customer reviews, the DuroMax XP13000EH stands out as the best overall dual fuel generator for most homeowners. With 13,000 watts of starting power, 4.5 stars across nearly 4,000 reviews, and proven reliability through multiple hurricane seasons, it delivers what matters when the power goes out.
For buyers on a budget, the WEN DF475T offers exceptional value at around $465. It does not power an entire home, but it handles essential circuits, RV use, and job site applications with reliable electric start and 11 hours of runtime.
RV owners and off-grid enthusiasts should look at the WEN DF680iX. Its inverter technology produces clean power safe for sensitive electronics, and the Level 2 EV charging capability is unique in this category. The quiet operation makes it campground-friendly.
Whatever you choose, invest in basic accessories: a battery tender, extra oil, a fuel stabilizer, and proper extension cords rated for your load. These small additions extend generator life and ensure reliable starting when you need it most. The best dual fuel generators are the ones that start on the first pull when the power goes out, and every model in this roundup has proven itself capable of doing exactly that.