When the power goes out, the last thing you want is to be stuck with a generator you can’t refuel. That’s one reason dual fuel generators have become so popular — they run on either gasoline or propane, giving you more options and better flexibility in emergencies, on job sites, or during off-grid adventures.
In this detailed review, we’ll cover how dual fuel generators work, why they’re worth considering, and highlight some of the best models on the market. We’ll also look at their pros and cons, maintenance needs, and how they compare to fuel-free alternatives.
What Is a Dual Fuel Generator?
Simply put, a dual fuel generator is a machine that can operate on two types of fuel — typically gasoline and propane. Switching between fuels is often as simple as turning a dial or flipping a switch, and some models can even run continuously by connecting to large propane tanks.
Why does this matter? Gasoline is easy to find but has a shorter shelf life and can be harder to get during widespread outages. Propane stores longer, burns cleaner, and can be kept in large tanks, making it a great backup option.
Top Dual Fuel Generator Models
1. Champion 4500-Watt Dual Fuel Inverter
This portable inverter generator offers 4,500 starting watts and 3,150 running watts on gasoline, slightly less on propane. It’s quiet for its size, making it perfect for RVs, camping, and home essentials. Inverter technology ensures clean power for sensitive electronics.
- Pros: Quiet operation, clean power, RV-ready outlet
- Cons: Smaller fuel tank means shorter runtime at full load
2. DuroMax XP12000EH
Nicknamed the “Beast,” this open-frame unit delivers up to 12,000 starting watts on gasoline and 11,400 on propane. It’s capable of powering a whole home during an outage or running multiple heavy-duty tools on a job site.
- Pros: Massive power output, multiple 120V/240V outlets, electric start
- Cons: Loud and heavy — not for casual portability
3. Westinghouse WGen9500DF
Offering 9,500 running watts and 12,500 starting watts on gasoline, this model is a strong choice for home backup. It features remote start capability and plenty of outlet options, including a transfer switch-ready outlet for home integration.
- Pros: Remote start, transfer switch-ready, high runtime on propane
- Cons: Large footprint and heavier than average
4. Pulsar G12KBN
This budget-friendly dual fuel generator delivers up to 12,000 watts starting power and includes both electric and recoil start. It’s a solid choice for those wanting big power without breaking the bank.
- Pros: Affordable for its output, dual starting methods
- Cons: No inverter — not ideal for sensitive electronics
Benefits of Dual Fuel Generators
- Fuel Flexibility: Switch between gasoline and propane depending on availability.
- Extended Runtime: Run longer by switching fuels or connecting to large propane tanks.
- Longer Shelf Life for Propane: Store propane for years without degradation.
- Cleaner Emissions: Propane burns cleaner than gasoline, producing less carbon buildup.
Potential Drawbacks
- Higher Cost: Dual fuel models are usually more expensive than single-fuel equivalents.
- More Complex: Extra components mean more potential maintenance needs.
- Performance Variance: Slightly less wattage output on propane compared to gasoline.
Maintenance Tips for Dual Fuel Generators
- Run the generator monthly for 15–20 minutes to keep parts lubricated.
- Use fuel stabilizer for stored gasoline to prevent carburetor issues.
- Drain gasoline if storing for long periods — propane can be stored as-is.
- Clean the air filter regularly and change oil per the manufacturer’s schedule.
Dual Fuel vs. Single Fuel Generators
Single fuel generators are often cheaper and slightly simpler to maintain. However, dual fuel models give you far more flexibility, especially in emergencies where one fuel type might be scarce. For many buyers, that peace of mind outweighs the extra upfront cost.
Fuel Dependency: The Common Limitation
Even with the flexibility of gasoline and propane, dual fuel generators still rely on stored fuel. In extended outages or supply chain disruptions, this can be a limiting factor. That’s why more people are combining traditional generators with fuel-free backup systems.
The Ultimate OFF-GRID Generator
The Ultimate OFF-GRID Generator is an untapped source of on-demand electricity that runs quietly, produces no emissions, and doesn’t require refueling. It’s ideal for keeping lights, electronics, and small appliances running indefinitely, while your dual fuel generator handles heavier loads.
By pairing the two, you can stretch your fuel supply and stay powered through outages of any length.
The Bottom Line
Dual fuel generators offer a great blend of power, flexibility, and reliability. Whether you choose a small inverter for travel, a mid-size model for home essentials, or a massive unit for whole-home backup, having two fuel options gives you an edge in emergencies. Combine that with a fuel-free backup source, and you’ll have a power strategy that covers both short-term and long-term needs.
Click here to see how the Ultimate OFF-GRID Generator works and take the first step toward complete energy security today.