The best dual fuel generators of 2027 run on both gasoline and propane, and that one extra fuel option changes the math of emergency backup. Gasoline goes stale in a few months and gas stations run dry during long outages. Propane, on the other hand, stores indefinitely in a sealed tank and burns cleaner. We researched and compared eight dual fuel generators — from compact 4,750-watt units to 13,000-watt whole-home machines — to find the best picks for home backup.
Dual fuel means exactly two fuels: gasoline and liquid propane (LPG). This article does not cover tri-fuel models (those add natural gas) — if you have a home gas line, see our tri-fuel roundup. Expect about 10% less power on propane than gasoline on most models; that is normal, since propane carries less energy per gallon.

One honest note up front: the popular Generac GP8000E is a gasoline-only generator, not a dual fuel model, so you will not find it here — we replaced it with Generac’s actual dual fuel pick, the GP7500E. Every model below was verified as a true gasoline-plus-propane dual fuel unit.
Key takeaways
- Westinghouse WGen9500DF is our overall pick — 12,500 peak watts, remote start, and a 50A transfer-switch outlet.
- DuroMax XP13000EH delivers the most power in this roundup at 13,000 starting watts.
- Champion 201319 is the best dual fuel inverter: quiet, RV-ready, and clean enough for electronics.
- Expect roughly 10% less power on propane than gasoline — size your loads against the propane rating.
- Propane stores indefinitely, so it is the better long-term emergency fuel; keep gasoline fresh with stabilizer or rotate it.
Our top picks at a glance
- Westinghouse WGen9500DF — Best overall — 12,500 peak watts with remote start and 50A outlet
- DuroMax XP13000EH — Most powerful — 13,000 starting watts for whole-home backup
- Champion 201319 — Best dual fuel inverter — 61 dBA, RV-ready, CO Shield
- WEN DF475T — Best compact budget pick — electric start, CARB compliant
- Generac GP7500E — Best Generac pick — PowerRush tech with COsense protection

Best overall
Westinghouse WGen9500DF 12,500 Peak Watt Dual Fuel Generator
- 9500W running / 12500W peak output
- gasoline / propane
- Up to up to 12h on 6.6-gal tank runtime
- L14-30R 30A + 14-50R 50A transfer-ready outlets, remote electric start, VFT data center
- 12500W starting watts / 9500W running watts
- gasoline / propane
- up to 12h on 6.6-gal tank
- 210 lbs
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The Westinghouse WGen9500DF is the best dual fuel generator for most home backup buyers. With 12,500 peak watts and 9,500 running watts on gasoline, it handles a well pump, refrigerator, furnace fan, and lights at the same time — the core of a comfortable outage. The 457cc engine starts with a push button or a wireless remote, which is a genuine luxury at 2 a.m. in a blackout.
For whole-home connection it includes both an L14-30R 30A outlet and a 14-50R 50A outlet, so it plugs straight into a transfer switch. The VFT data center displays voltage, frequency, and lifetime hours for maintenance tracking. Owner feedback we reviewed consistently highlights reliable starts on propane after months of storage — exactly the scenario dual fuel is built for.
Runtime runs about 12 hours on the 6.6-gallon gasoline tank. On propane, expect a bit less output but the convenience of fuel that never goes stale. At 210 pounds it needs its wheel kit and a permanent spot, but for the money this is the most complete dual fuel package.
| Running watts | 9,500 (gasoline) |
|---|---|
| Starting watts | 12,500 (gasoline) |
| Fuel type | Dual fuel: gasoline, propane (LPG) |
| Noise level | Not published in manufacturer specs we reviewed |
| Runtime | Approx. 12 hours (6.6 gal gasoline tank) |
| Weight | Approx. 210 lbs |
Pros
- 12,500 peak watts — true whole-home backup power
- Push-button + remote start
- 30A and 50A transfer-switch-ready outlets
- VFT data center for maintenance tracking
Cons
- No published noise rating
- 210 lbs — needs a permanent outdoor spot
- Propane output lower than gasoline (normal for dual fuel)

Most powerful
DuroMax XP13000EH 13,000-Watt Dual Fuel Portable Generator
- 10500W running / 13000W peak output
- gasoline / propane
- Up to 8h @ 50% on gasoline runtime
- 500cc engine, 50A transfer-switch-ready outlet, EPA+CARB 50-state, 3-yr warranty
- 13000W starting watts / 10500W running watts
- gasoline / propane
- 8h @ 50% on gasoline
- 234 lbs
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The DuroMax XP13000EH is the highest-output dual fuel generator in this roundup: 13,000 starting watts and 10,500 running watts on gasoline. If your outage plan includes central air or a large well pump alongside everything else, this is the portable that can actually do it.
It carries DuroMax’s full feature set: push-button start, CO Alert carbon-monoxide shutdown, a 50A transfer-switch-ready outlet, and MX2 technology that delivers full rated power from each 120V receptacle. Owner feedback points to strong multi-day reliability, with many buyers running primarily on propane to avoid gasoline storage headaches.
The price of that power is size — about 234 pounds and a thirsty 500cc-class engine that gives roughly 8 hours at half load. But if you want the biggest dual fuel portable available, this is it.
| Running watts | 10,500 (gasoline) |
|---|---|
| Starting watts | 13,000 (gasoline) |
| Fuel type | Dual fuel: gasoline, propane |
| Noise level | Not published in manufacturer specs we reviewed |
| Runtime | Approx. 8 hours at 50% load (gasoline) |
| Weight | Approx. 234 lbs |
Pros
- Highest output of any dual fuel model here
- CO Alert protection and push-button start
- 50A transfer-switch-ready outlet
- MX2 full-power 120V receptacles
Cons
- Heavy at 234 lbs
- Thirsty at high loads — ~8 hrs at 50%
- No published noise rating

Best compact budget pick
WEN DF475T 4,750-Watt Dual Fuel Portable Generator
- 3,800 (gasoline); 3,500 (propane) running / 4,750 (gasoline); 4,350 (propane) peak output
- Dual Fuel: gasoline, propane (LPG)
- Model DF475T confirmed (ASIN matches item model number)
- 4,750; 4,350 starting watts / 3,800; 3,500 running watts
- Dual Fuel: gasoline, propane (LPG)
- 105.8 lbs
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The WEN DF475T proves dual fuel does not have to mean big and expensive. At 4,750 starting watts and 3,800 running watts on gasoline (3,500 on propane), it covers the outage essentials: refrigerator, freezer, lights, phone chargers, and a sump pump — just not all at once with big motor loads.
What makes it stand out at this price is electric start — rare on budget generators — plus CARB compliance for 50-state sale and use. At about 105.8 pounds it is light enough for one strong person to maneuver on its wheel kit. Owner feedback we reviewed praises how easily it starts and how well it sips propane from a standard 20-pound tank.
This is not a whole-home generator, and buyers should be honest about that. But as an affordable dual fuel backup for essentials, or a first generator for a smaller home, it is excellent value.
| Running watts | 3,800 (gasoline); 3,500 (propane) |
|---|---|
| Starting watts | 4,750 (gasoline); 4,350 (propane) |
| Fuel type | Dual fuel: gasoline, propane (LPG) |
| Noise level | Not published in manufacturer specs we reviewed |
| Runtime | Not published in manufacturer specs we reviewed |
| Weight | Approx. 105.8 lbs |
Pros
- Affordable entry into dual fuel
- Electric start at a budget price
- CARB compliant — legal in all 50 states
- Light enough to move easily
Cons
- Won’t run a whole home — essentials only
- Runtime not published by manufacturer
- 2-year warranty

Best dual fuel inverter
Champion 201319 4,500-Watt Dual Fuel Inverter Generator
- 3500W (gasoline), 3150W (propane) running / 4500W peak output
- dual fuel (gasoline/propane)
- Up to up to 14h gasoline / 21h propane (@25% load) runtime
- Dual-fuel flexibility with a dedicated 30A TT-30R RV outlet and CO Shield
- 4500W starting watts / 3500W, 3150W running watts
- dual fuel (gasoline/propane)
- Noise: 61 dBA
- up to 14h gasoline / 21h propane (@25% load)
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The Champion 201319 is the dual fuel inverter to buy if you want quiet, clean power. At 61 dBA it is dramatically quieter than any conventional generator here, and the inverter design produces stable, low-distortion electricity that is safe for laptops, TVs, and phone chargers. With 4,500 starting watts and 3,500 running watts on gasoline (3,150 on propane), it handles RV air conditioners up to about 13,500 BTU with load management.
CO Shield carbon-monoxide shutoff is built in, and the unit is parallel-capable — connect two for double the power. Runtime is a standout: about 14 hours on the 2.25-gallon gasoline tank, or up to 21 hours on a 20-pound propane tank at light load. At 99.2 pounds it is genuinely portable.
Owner feedback highlights the propane runtime and the quiet operation at campgrounds. For RV use, tailgating, or quiet neighborhood backup of essentials, this is the best dual fuel inverter value we found.
| Running watts | 3,500 (gasoline); 3,150 (propane) |
|---|---|
| Starting watts | 4,500 (all fuels) |
| Fuel type | Dual fuel: gasoline, propane |
| Noise level | 61 dBA |
| Runtime | Approx. 14 hrs (gasoline, 2.25 gal); 21 hrs (propane, 20-lb tank) |
| Weight | Approx. 99.2 lbs |
Pros
- Quiet 61 dBA inverter operation
- Clean power safe for electronics
- Up to 21 hours runtime on propane
- Parallel-capable and RV-ready
Cons
- Won’t power a whole home
- Premium price per watt vs conventional
- 99 lbs is portable but not light

Classic RV-ready pick
Champion 76533 4,750-Watt Dual Fuel Portable Generator
- 3,800 (gasoline) running / 4,750 (gasoline) peak output
- Dual Fuel: gasoline, propane (LPG)
- Up to 8 hrs @50% load (gasoline, 3.4 gal); 5.5 hrs @50% load (propane, 20-lb tank) runtime
- Listing still live, model 76533 matches ASIN
- 4,750 starting watts / 3,800 running watts
- Dual Fuel: gasoline, propane (LPG)
- 8 hrs @50% load (gasoline, 3.4 gal); 5.5 hrs @50% load (propane, 20-lb tank)
- 119 lbs
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The Champion 76533 is the long-running classic of the dual fuel world. With 4,750 starting watts and 3,800 running watts on gasoline, it has powered RVs and job sites for years, and the huge installed base means parts and know-how are easy to find. Electric start is standard, and Champion’s Volt Guard protects against voltage spikes.
Runtime runs about 8 hours at half load on the 3.4-gallon gasoline tank, or 5.5 hours at half load on a 20-pound propane tank. At 119 pounds it sits between the compact WEN and the big whole-home units — manageable on its wheel kit for one person.
It is a conventional generator, so expect conventional noise levels and fuel consumption. But if you want a proven, no-surprises dual fuel workhorse with years of owner history behind it, the 76533 is hard to argue with.
| Running watts | 3,800 (gasoline) |
|---|---|
| Starting watts | 4,750 (gasoline) |
| Fuel type | Dual fuel: gasoline, propane (LPG) |
| Noise level | Not published in manufacturer specs we reviewed |
| Runtime | Approx. 8 hrs at 50% load (gasoline, 3.4 gal); 5.5 hrs at 50% load (propane, 20-lb tank) |
| Weight | Approx. 119 lbs |
Pros
- Years of proven owner history
- Electric start and Volt Guard surge protection
- Good power for RV and job-site use
- Wide parts and service availability
Cons
- Conventional noise and fuel use
- No CO shutoff sensor (older design)
- No published noise rating

Best mid-size value
FIRMAN H03655 4,550-Watt Dual Fuel Portable Generator
- 3,650 (gasoline); 3,300 (propane) running / 4,550 (gasoline); 4,100 (propane) peak output
- Dual Fuel: gasoline, propane (LPG)
- Up to 14 hours @50% load (gasoline, 5 gal) runtime
- FIRMAN’s official page, manual, and generatorbible all list H03655 as Hybrid Dual Fuel (gasoline + propane) only
- 4,550; 4,100 starting watts / 3,650; 3,300 running watts
- Dual Fuel: gasoline, propane (LPG)
- Noise: 67 dBA
- 14 hours @50% load (gasoline, 5 gal)
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The FIRMAN H03655 is a strong mid-size dual fuel value: 4,550 starting watts and 3,650 running watts on gasoline (3,300 on propane), with a 5-gallon tank that stretches to about 14 hours at half load. At 67 dBA it is on the quieter side for a conventional generator, and the 112-pound weight is manageable.
One important clarification: despite some third-party listings describing it as “tri-fuel,” FIRMAN’s own website, owner’s manual, and spec sheets classify the H03655 as dual fuel — gasoline and propane only. There is no natural-gas H03655. We verified this during research and present it here exactly as the manufacturer does. If you need natural gas capability, see our tri-fuel roundup instead.
Taken for what it is — a dual fuel generator — the H03655 is a solid deal: good runtime, reasonable noise, and honest mid-size power for essential backup or RV use.
| Running watts | 3,650 (gasoline); 3,300 (propane) |
|---|---|
| Starting watts | 4,550 (gasoline); 4,100 (propane) |
| Fuel type | Dual fuel: gasoline, propane (LPG) — NOT tri-fuel |
| Noise level | 67 dBA |
| Runtime | Approx. 14 hours at 50% load (gasoline, 5 gal) |
| Weight | Approx. 112 lbs |
Pros
- Long 14-hour runtime from 5-gallon tank
- Quieter than most conventional models (67 dBA)
- Honest dual fuel specs from the manufacturer
- Good value for mid-size backup
Cons
- Not tri-fuel despite some listings’ claims
- Won’t run a whole home
- Smaller service network than top brands

Best 5.5kW dual fuel
DuroMax XP5500EH 5,500-Watt Dual Fuel Portable Generator
- 4,500 (gasoline) running / 5,500 (gasoline) peak output
- Dual Fuel: gasoline, propane
- Up to 9 hrs @50% load (gasoline); 8 hrs @50% load (propane) runtime
- Verified replacement for the gasoline-only Generac GP8000E
- 5,500 starting watts / 4,500 running watts
- Dual Fuel: gasoline, propane
- 9 hrs @50% load (gasoline); 8 hrs @50% load (propane)
- 124 lbs
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The DuroMax XP5500EH hits the sweet spot for buyers who need more than a compact unit but less than a whole-home monster: 5,500 starting watts and 4,500 running watts on gasoline. That covers a refrigerator, freezer, sump pump, furnace fan, and lights with room to spare.
The 224cc OHV engine includes DuroMax’s MX2 technology for full power from each 120V outlet, and electric start is standard. Runtime is about 9 hours at half load on gasoline or 8 hours on propane. At 124 pounds it is a one-person move on the wheel kit.
Owner feedback we reviewed points to reliable cold-weather starting and solid build quality for the price. For a medium-size home’s essential circuits, this is the right amount of generator without overbuying.
| Running watts | 4,500 (gasoline) |
|---|---|
| Starting watts | 5,500 (gasoline) |
| Fuel type | Dual fuel: gasoline, propane |
| Noise level | Not published in manufacturer specs we reviewed |
| Runtime | Approx. 9 hrs at 50% load (gasoline); 8 hrs at 50% load (propane) |
| Weight | Approx. 124 lbs |
Pros
- Right-sized power for essential circuits
- Electric start and MX2 full-power outlets
- Manageable 124-lb weight
- Strong value for the wattage
Cons
- No published noise rating
- No CO shutoff sensor listed
- Won’t run central air

Best Generac pick
Generac GP7500E 9,400 Starting Watt Dual Fuel Portable Generator
- 7,500 (gasoline) running / 9,400 (gasoline) peak output
- Dual Fuel: gasoline, propane
- Generac’s actual dual-fuel model in this lineup
- 9,400 starting watts / 7,500 running watts
- Dual Fuel: gasoline, propane
- 204 lbs
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The Generac GP7500E is Generac’s true dual fuel answer in this class — worth stating clearly because the similar-looking GP8000E is gasoline-only and does not belong in a dual fuel roundup. The GP7500E delivers 9,400 starting watts and 7,500 running watts on gasoline, with Generac’s PowerRush technology providing extra starting capacity for motor loads like well pumps.
The 420cc OHV engine includes COsense carbon-monoxide shutdown, and electric start is standard. At about 204 pounds it is a substantial machine, built for serious home backup rather than camping. Generac’s dealer network is the largest in the industry, which matters for parts and service years down the road.
Runtime figures were not fully published at research time, so check the listing. For buyers loyal to the Generac brand who want genuine dual fuel capability, this is the correct model — not the GP8000E.
| Running watts | 7,500 (gasoline) |
|---|---|
| Starting watts | 9,400 (gasoline) |
| Fuel type | Dual fuel: gasoline, propane |
| Noise level | Not published in manufacturer specs we reviewed |
| Runtime | Not published in manufacturer specs we reviewed |
| Weight | Approx. 204 lbs |
Pros
- True dual fuel from the biggest generator brand
- PowerRush extra starting capacity
- COsense carbon-monoxide protection
- Largest dealer/service network
Cons
- Runtime not published at research time
- Heavy at 204 lbs
- Easy to confuse with the gasoline-only GP8000E
Dual fuel generators compared
Wattage figures are running watts on gasoline. Plan your loads against the propane rating if propane is your primary outage fuel.
| Product | Running watts | Fuel | Noise | Best for | |
|---|---|---|---|---|---|
| Westinghouse WGen9500DF 12,500 Peak Watt Dual Fuel Generator | 9,500 | Gas / propane | Not published | Home backup | Check price |
| DuroMax XP13000EH 13,000-Watt Dual Fuel Portable Generator | 10,500 | Gas / propane | Not published | Maximum power | Check price |
| WEN DF475T 4,750-Watt Dual Fuel Portable Generator | 3,800 | Gas / propane | Not published | Budget essentials | Check price |
| Champion 201319 4,500-Watt Dual Fuel Inverter Generator | 3,500 | Gas / propane | 61 dBA | Quiet RV backup | Check price |
| Champion 76533 4,750-Watt Dual Fuel Portable Generator | 3,800 | Gas / propane | Not published | Proven workhorse | Check price |
| FIRMAN H03655 4,550-Watt Dual Fuel Portable Generator | 3,650 | Gas / propane | 67 dBA | Mid-size value | Check price |
| DuroMax XP5500EH 5,500-Watt Dual Fuel Portable Generator | 4,500 | Gas / propane | Not published | Essential circuits | Check price |
| Generac GP7500E 9,400 Starting Watt Dual Fuel Portable Generator | 7,500 | Gas / propane | Not published | Generac brand pick | Check price |
How do you choose the best dual fuel generator in 2027?
Dual fuel adds one decision on top of normal generator shopping: how much you will lean on propane. These are the factors we weighed when ranking the eight models above.
How much power do you need on propane?
This is the number most buyers get wrong. A generator’s headline wattage is always the gasoline rating; on propane you typically lose about 10%. The Westinghouse WGen9500DF’s 9,500 gasoline watts become roughly 8,550 on propane — still plenty for essentials, but it matters if you are sizing close to the line.
Add up the running watts of your must-run appliances, add the largest starting load (well pump, AC, sump pump), then make sure the propane rating covers it if propane is your planned outage fuel. Our home sizing guide walks through real appliance numbers.
Gasoline vs propane: when to use each
Use gasoline when you need maximum power and the stations are open. Use propane for everything else: it stores indefinitely without going stale, burns cleaner (less carbon buildup, longer engine life), and you can stockpile tanks before storm season. Many experienced owners run gasoline for day one of an outage, then switch to propane for the long haul.
One practical tip: a standard 20-pound grill tank holds about 4.6 gallons of propane. For multi-day backup, that goes fast on a big generator — consider 40-pound tanks or a 100-pound cylinder if you have the space to store them safely outdoors.
Inverter or conventional?
Inverter generators (like the Champion 201319) produce clean, stable power safe for sensitive electronics, run quieter, and sip fuel at light loads. Conventional generators (like the DuroMax XP13000EH) give you far more watts per dollar and are better for heavy motor loads. If your backup plan is mostly fridge, furnace, and lights, conventional is fine. If laptops, home office gear, and modern HVAC controls are in the mix, lean inverter.
Starting type and outlets
Electric start — push button or remote — is worth paying for on any generator over 100 pounds. Pull-starting a big 500cc engine in the cold is miserable. For whole-home use, look for a 14-50R 50A or L14-30 30A outlet that connects to a transfer switch. For RV use, a TT-30R 30A RV outlet is the key feature.
A transfer switch must be installed by a licensed electrician to meet local electrical code — never plug a generator into a wall outlet (backfeeding), which endangers utility workers and is illegal in most areas.
Carbon-monoxide protection
Every generator in this roundup that we could verify includes or is compatible with CO safety features — CO Alert (DuroMax), CO Shield (Champion), COsense (Generac), or CO Watchdog-style sensors. These shut the engine down if carbon monoxide builds up. They are a genuine lifesaver, but they are not a substitute for running the unit outdoors, 20+ feet from the house, with working CO detectors inside.
Warranty and long-term support
Generators last 10–20 years with maintenance, so buy the company, not just the machine. DuroMax offers 5 years on its big units; most others offer 2–3. Check parts availability too — mainstream brands like Champion, Westinghouse, Generac, and DuroMax have broad dealer networks for filters, carburetors, and service years from now.
Dual fuel generator FAQs
What is a dual fuel generator?
A dual fuel generator runs on two fuels: gasoline and liquid propane (LPG). It has a standard gasoline tank plus a propane inlet with a regulator hose that connects to a propane tank. You switch fuels with a selector dial — no tools or conversion kit needed. Tri-fuel models add a third option, natural gas; see our tri-fuel roundup if you have a home gas line.
Is the Generac GP8000E a dual fuel generator?
No — this is a common point of confusion. The Generac GP8000E is gasoline-only. Generac’s dual fuel model in this size class is the GP7500E, which is the one we included in this roundup. Similarly, the FIRMAN H03655 is dual fuel (gasoline + propane) only, despite some third-party listings calling it tri-fuel — FIRMAN’s own manual confirms there is no natural-gas version.
How much less power do you get on propane?
Typically about 10% less running power on propane than gasoline. For example, a generator rated 4,500 running watts on gasoline usually delivers around 4,050–4,100 on propane. Size your loads against the propane rating if that is your planned outage fuel.
How long does propane last in storage?
Essentially indefinitely. Unlike gasoline, which goes stale in 3–6 months (even with stabilizer it degrades within about a year), propane in a sealed tank does not degrade. That is the main reason dual fuel owners keep propane as their emergency fuel: the generator will start on year-old propane just as well as on fresh fuel.
Can I run a dual fuel generator on natural gas?
Not safely without an aftermarket conversion kit — and we do not recommend third-party fuel conversions, since they can void the warranty and create safety risks. Dual fuel generators are engineered and certified for gasoline and propane only. If you want natural gas, buy a tri-fuel model designed for it from the factory.
Is it safe to store propane tanks in the garage?
No. Propane tanks should always be stored upright, outdoors, in a ventilated area away from heat sources — never in a garage, basement, or enclosed shed. Propane is heavier than air and can pool in low enclosed spaces, creating an explosion risk. Keep tanks away from the generator’s exhaust heat while running, too.
Our verdict
The Westinghouse WGen9500DF is the best dual fuel generator of 2027 for most homeowners: 12,500 peak watts, remote start, transfer-switch-ready outlets, and proven reliability on propane. Need maximum power? Get the DuroMax XP13000EH. Want quiet, clean power for an RV or electronics-heavy backup? The Champion 201319 inverter is the pick. On a budget, the WEN DF475T delivers real dual fuel capability for essentials at the lowest price here.
How we researched: We did not perform hands-on testing. We compared manufacturer specifications for eight dual fuel generators verified on Amazon in October 2026, confirmed each model’s fuel type against brand websites and manuals (which is how we caught the FIRMAN H03655 tri-fuel mislabeling and the gasoline-only Generac GP8000E), and reviewed aggregated owner feedback on reliability and propane performance. We never invented specifications — where a manufacturer had not published a figure, we said so. Check the live listing for current prices and availability.
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