Dual fuel generators run on either gasoline or propane, and that flexibility is genuinely valuable during emergencies. When a major storm hits and every gas station in the region has lines stretching around the block — or has run out entirely — the ability to switch to propane from your home tank can mean the difference between power and no power.
Best Dual Fuel Generators 2026
| Model | Gas Watts | Propane Watts | Runtime (Gas) |
|---|---|---|---|
| Champion 100813 | 8,500W | 7,650W | 8 hrs @ 50% |
| DuroMax XP10000EH | 10,000W | 9,000W | 10 hrs @ 50% |
| Westinghouse WGen9500DF | 9,500W | 8,550W | 12 hrs @ 50% |
| Champion 201161 | 12,000W | 10,800W | 9 hrs @ 50% |
| DuroMax XP13000EH | 13,000W | 11,700W | 8.5 hrs @ 50% |
1. Champion 100813 — Best Overall Dual Fuel Generator
The Champion 100813 consistently earns top marks in the dual fuel category for its combination of power, reliability, and price. At 8,500 running watts on gasoline and 7,650 watts on propane, it handles most whole-home essential circuits comfortably. The Intelligauge panel displays voltage, frequency, and runtime hours — genuinely useful for monitoring performance during extended outages.
Switching between gasoline and propane is as simple as turning a selector valve — the generator does not need to be shut down to switch fuels. The 3-year warranty is one of the best in this category.
2. DuroMax XP10000EH — Best High-Power Dual Fuel
When you need maximum dual fuel power, the DuroMax XP10000EH delivers 10,000 watts on gasoline and 9,000 watts on propane. The DuroMax 439cc OHV engine is robust and has developed a strong reputation for reliability in demanding conditions. The MX2 technology allows the generator to operate at full power on 120V or split the load between two 120V lines.
3. Westinghouse WGen9500DF — Best Runtime Dual Fuel
The Westinghouse WGen9500DF stands out for its exceptional runtime: 12 hours at 50% load on a single 6.6-gallon gasoline tank. For multi-day outages, that runtime advantage reduces refueling frequency significantly. Remote start capability adds convenience, and the push-button electric start is reliable in cold temperatures.
Propane vs Gasoline: When to Use Each
Use Gasoline When
- Gasoline is readily available and fresh
- You need maximum wattage output
- Runtime per fuel volume is the priority
Use Propane When
- Gasoline is scarce after a major storm or disaster
- You have a large propane tank at home
- You want fuel that stores indefinitely without degradation
- Running time between refuels is not the priority
Propane Storage Tips
For emergency preparedness, maintain a minimum 100-pound propane tank dedicated to generator use. A 100-pound tank holds approximately 23 gallons of propane. At 50% load on a dual fuel generator consuming roughly 1–1.5 gallons per hour on propane, that provides 15–23 hours of runtime — enough for most short-term outages.
For extended outage preparedness, a 500-gallon permanently installed propane tank is the practical solution. Keep it at 50% full or above during storm season.
Final Verdict
The Champion 100813 is the best dual fuel generator for most homeowners — it balances power, reliability, and value better than any competitor at its price point. For maximum output, the DuroMax XP10000EH is the choice. And for the best runtime between refuels, the Westinghouse WGen9500DF earns serious consideration.