When selecting the best dual fuel portable generators, consider wattage, runtime, noise level, features, and of course, fuel flexibility. Running on gasoline or propane, these models offer versatility, long runtimes, and robust performance during power outages, job sites, or outdoor adventures.
1. Westinghouse 12500 W Dual Fuel Portable Generator
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Why it ranks top: With 12,500 W peak (gas) and 11,200 W peak (propane), a 6.6 gal fuel tank delivering up to 12 hrs runtime, and remote + electric start.
Specification Chart
| Spec | Gasoline | Propane |
|---|---|---|
| Running Watts | 9,500 W | 8,500 W |
| Peak Watts | 12,500 W | 11,200 W |
| Fuel Tank Capacity | 6.6 gal | — |
| Runtime @ 25% Load | Up to 12 hrs – 6.6 gal | Up to 7 hrs – 20 lb tank |
| Engine | 457 cc OHV 4‑stroke | Same |
| Start System | Electric push‑button + recoil; remote key fob | Same |
| Weight | 211–217 lb | Same |
| Noise | ~74 dBA | Same |
| Outlets | 2×120 V GFCI, L14‑30R, 14‑50R, ST Switch Ready | Same |
| Extras | Fuel gauge, auto low‑oil shutdown, VFT meter, wheels, transfer-switch ready, kit included | Same |
| Warranty | 3 yr limited | 3 yr limited |
Summary: A powerhouse suited for whole-home backup, RVs, and demanding work sites. The remote start key-fob and robust feature set make it extremely convenient .
2. WEN Quiet 6800 W Dual Fuel Inverter Generator (DF680iX)
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Why it stands out: Clean inverter power, CO Watchdog sensor, RV-ready outlets, and quiet operation (~64 dBA).
Specification Chart
| Spec | Gasoline | Propane |
|---|---|---|
| Running Watts | 5,100 W | 4,500 W |
| Peak Watts | 6,800 W | 6,000 W |
| Fuel Tank Capacity | ~2.9 gal | — |
| Runtime @ 50% Load | ~6.1 hrs | ~9 hrs |
| Engine | 224 cc OHV 4‑stroke | Same |
| Start System | Electric + recoil | Same |
| Weight | 94.8 lb | Same |
| Noise | 64 dBA (lowest) | Same |
| Outlets | 120 V duplex, 120 V30A (TT-30R), 120/240 V30A (L14-30R), 12 V DC, USB | Same |
| Extras | CO Watchdog, digital display, fuel shut-off, parallel capable | Same |
| Warranty | 3 yr limited | 3 yr limited |
Summary: Ideal for RV use and powering sensitive electronics, offering clean, quiet power and safety features like a CO detector .
3. DuroMax XP13000EH 13,000 W Dual Fuel Generator
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This model rounds out the list with massive capacity suitable for heavy-duty industrial or whole-house backup. The XP13000EH (13,000 W surge, 10,500 W running) runs on gas/propane and is priced competitively on Amazon.
Highlights:
- Heavy-duty 18 hp engine
- Multiple outlets (120 V, 240 V, RV-ready)
- Electric start, wheel kit, transfer-switch ready
- Built-in voltmeter, circuit breakers
Note: Specific Amazon-sourced specs still pending; typical running watts ~10,500 W gas / 9,500 W propane; large fuel tank (~8.3 gal) for long runtimes.
4. WEN 11,000 W Dual Fuel Generator
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Although inverter details aren’t available, WEN’s 11 kW model offers raw power with dual-fuel flexibility, electric start, and a full suite of outlets and safety features.
Expected Features:
- ~11,000 W surge, 8,500–9,500 W running
- Gas/propane compatible
- Rugged frame, fueling gauge, low oil shutoff
- Electric start, transfer switch-ready, wheel kit
5. Westinghouse Super‑Quiet 4000 W Dual Fuel Inverter Generator
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Why it deserves a spot: Compact yet capable, with inverter clean power, CO sensor, RV-ready design, weighing significantly less than traditional open-frame.
Expected Specs:
- ~4,000 W peak
- Gas/propane dual-fuel
- Inverter (low THD <3%)
- Electric start, CO sensor, multiple outlets
- Quiet operation (~60 dBA) and lightweight (~100 lb)
Comparison Table at a Glance
| Model | Running Watts (Gas/Propane) | Peak Watts (Gas/Propane) | Noise | Weight | Notable Features |
|---|---|---|---|---|---|
| Westinghouse 12500 W Dual Fuel | 9,500 / 8,500 W | 12,500 / 11,200 W | ~74 dBA | 211 lb | Remote start, transfer switch, 12 hr runtime |
| WEN Quiet 6800 W Dual Fuel Inverter (DF680iX) | 5,100 / 4,500 W | 6,800 / 6,000 W | 64 dBA | 94.8 lb | Inverter, CO sensor, RV-ready, parallel |
| DuroMax XP13000EH | ~10,500 W / ~9,500 W | 13,000 W | ~74 dBA? | ~235 lb? | High power, electric start, industrial use |
| WEN 11,000 W Dual Fuel | ~9,500 W? / ~8,500 W? | 11,000 W | ~72 dBA? | ~205 lb | Raw power, transfer switch ready |
| Westinghouse 4000 W Dual Fuel Inverter | ~3,500 W / ~3,000 W | ~4,000 W | ~60 dBA? | ~100 lb | Quiet, lightweight, clean inverter power |
How to Choose the Right Dual Fuel Portable Generator
- Determine power needs
- For essential appliances (fridge, sump pump), aim for 5,000–7,000 W.
- Whole-house backup or large rooms + AC: 9,000+ W.
- Runtime and fuel choice
- Gas delivers higher output and longer runtime (~12 hrs+ on big tanks).
- Propane is cleaner/stable but slightly less power and shorter runtime (~6–9 hrs).
- Starting options
- Electric + remote start are highly convenient, especially in bad weather.
- Clean power / electronics
- Inverter models like the WEN produce low THD (<1.2%), safe for laptops, smartphones, and EV chargers.
- Safety first
- CO sensors are vital—standard on modern inverter models.
- Transfer-switch compatibility lets you hook into your home grid safely.
- Noise levels
- Inverter models are quieter (60–65 dBA); open-frame fully loaded units reach ~74 dBA.
- Portability
- Units weighing under 100 lb are manageable; larger units (>200 lb) require wheels and handles.
Frequently Asked Questions
Q: Why choose dual fuel?
A: Dual fuel generators offer flexibility—you can switch between gasoline and propane based on cost, availability, and storage. Propane is more stable long-term, while gasoline provides higher output.
Q: Are inverter generators better for electronics?
A: Yes. Inverter generators produce “clean” power with THD <3%, ideal for appliances, computers, TVs. The WEN DF680iX has THD <1.2% .
Q: How important is the CO sensor?
A: Extremely. Carbon monoxide is odorless, colorless, and deadly. Generators emitting CO can build lethal concentrations quickly. Models like Westinghouse and WEN include sensors that shut off the unit if CO levels become dangerous .
Q: Can I connect to my home panel?
A: Yes—look for transfer-switch ready or ST Switch outlets (e.g., 14‑50R, L14‑30R). Always follow code and use a licensed electrician for safe integration.
Final Ranking: Best Dual Fuel Portable Generators 2025
- Westinghouse 12500 W Dual Fuel Portable Generator – Best for whole‑house backup & high-wattage needs.
- WEN Quiet 6800 W Dual Fuel Inverter (DF680iX) – Best for RVers, quiet camping, and electronics.
- DuroMax XP13000EH – Best for industrial/large-scale power at lower cost.
- WEN 11,000 W Dual Fuel Generator – Balanced middle-ground with high output.
- Westinghouse 4000 W Super Quiet Dual Fuel Inverter – Best compact option for mobile power and quieter operation.
Conclusion
For 2025, these five top-tier dual fuel portable generators lead the Generators & Accessories niche on Amazon US:
- Westinghouse 12500 W delivers sheer power and convenience with remote start.
- WEN DF680iX provides clean, quiet inverter power with RV-ready features.
- DuroMax XP13000EH and WEN 11 kW offer strong performance for demanding power needs.
- Westinghouse 4 kW inverter is perfect for low-noise, portable use.
Choose based on your power demands, runtime preference, and whether you prioritize quiet operation, clean electronics power, or raw output. This guide equips you to make a smart, SEO-informed choice for reliable, dual-fuel backup power in 2025.