Che cos’è un generatore inverter a doppia alimentazione? Guida completa all’acquisto
A dual fuel inverter generator is a portable generator that can operate on either gasoline or LPG while using inverter technology to provide clean, stable electrical output.
The term “dual fuel” does not normally mean that the generator burns two fuels at the same time. It means the operator can select one of two available fuel sources, typically gasoline or liquid propane, according to fuel availability and the intended application. Official dual-fuel generator specifications from Generac also describe this type of equipment as operating on gasoline or liquid propane.
For buyers, the main advantage is simple: a dual fuel inverter generator combines the fuel flexibility of a dual-fuel engine with the lower noise, stable output and efficient operation associated with inverter technology.
How Does a Dual Fuel Inverter Generator Work?
A dual fuel inverter generator contains two main systems:
- A fuel system that allows the engine to operate on gasoline or LPG.
- An inverter system that controls the electricity supplied to the outlets.
The engine first drives an alternator to generate AC electricity. That electricity is converted into DC power and then converted back into regulated AC power by the inverter module.
This process helps produce a more consistent sine wave and allows engine speed to respond to the connected load. Honda explains that inverter generators convert AC to DC and then back to AC, helping provide cleaner and more consistent electrical output than a traditional generator.
You can read more about the basic technology in Honda’s inverter generator guide.
What Is the Difference Between Dual Fuel and Inverter Technology?
These terms describe two different parts of the generator.
Dual fuel describes the engine’s fuel options.
Inverter describes how the generator processes and controls electrical output.
A generator may be:
- Gasoline-only and conventional
- Gasoline-only and inverter
- Dual fuel and conventional
- Dual fuel and inverter
- Tri-fuel and inverter
A dual fuel inverter generator therefore provides both fuel flexibility and electronically regulated power output.
Gasoline or LPG: Which Fuel Should You Use?
There is no single fuel that is best for every situation. The right choice depends on the application, available fuel and required output.
| Fattore | Benzina | LPG |
|---|---|---|
| Fuel supply | Filled into the generator’s onboard tank | Supplied from an external LPG cylinder |
| Uso tipico | Mobile work, outdoor activities and regular operation | Backup use and locations where LPG cylinders are readily available |
| Refueling | Fuel is poured directly into the tank | Cylinder and regulator connection required |
| Generator output | Often used as the main reference for rated and maximum output | Output may differ depending on the model |
| Storage setup | Fuel remains inside the onboard tank | Cylinder can be disconnected from the generator |
| Best suited for | Users needing convenient mobile operation | Users wanting an additional fuel option |
Buyers should not assume that output and runtime are identical on both fuels. Always confirm the rated output, maximum output and runtime data for gasoline and LPG separately.
The product manual should also be checked before switching fuels. Fuel-selector position, hose connection, regulator requirements and starting procedures may differ between models.
What Are the Main Advantages?
1. Greater Fuel Flexibility
During a power outage, outdoor project or remote job, one fuel may be easier to obtain than another. A dual fuel inverter generator allows the operator to select gasoline or LPG instead of depending on only one fuel source.
This flexibility is particularly useful for distributors serving markets with different fuel habits and availability.
2. Clean and Stable Power Output
Inverter technology controls voltage and frequency before electricity reaches the outlets. This makes the generator suitable for many appliances and electronic devices that require stable power.
Examples may include:
- Laptops and mobile chargers
- Televisori e apparecchiature di comunicazione
- Refrigerators
- Sistemi di illuminazione
- Electronic tools
- RV appliances
- Audio and event equipment
The generator must still have the correct voltage, frequency, rated power and starting capacity for the connected equipment.
3. Lower Noise at Partial Load
Many inverter generators can reduce engine speed when electrical demand is low. Enclosed housings and sound-dampening structures can further reduce operating noise.
When comparing noise levels, always check the measurement conditions. A rating measured at 25% load and seven metres should not be compared directly with a rating measured at full load or from a shorter distance.
4. Improved Fuel Management
Because the engine does not always need to operate at maximum speed, an inverter generator can use fuel more efficiently when the connected load is low. Actual consumption still depends on engine size, load percentage, fuel type and operating conditions.
5. More Application Options
Dual fuel inverter generators can be used for:
- Home backup power
- Camping and RV applications
- Eventi all'aperto
- Mobile service work
- Construction and maintenance
- Retail and rental markets
- Emergency power preparation
Higher-output models may also support larger appliances and professional equipment, provided their starting and continuous power requirements remain within the generator’s capacity.
Which Fullas Models Offer Dual-Fuel Operation?
According to the Fullas specification sheet, two iS Series models operate on gasoline and LPG.
Fullas Dual Fuel Inverter Generators
| Modello | Tipo di carburante | Potenza nominale | Max. Output | Motore | Gasoline Runtime at 1/2 Load | Noise Level |
|---|---|---|---|---|---|---|
| FP3500iS(E) | Gasoline/LPG | 3200W | 3400W | 150 cc | 4.5 hours | 62 dB(A) |
| FP4500iS(E) | Gasoline/LPG | 3800W | 4200W | 174 cc | 7.5 hours | 63 dB(A) |
Both models support recoil, electric and remote starting options. The FP4500iS(E) also includes handles and wheels, making it more convenient for applications requiring frequent transportation.
Explore these models on the Fullas inverter generator product page.
Which Fullas Models Offer Three Fuel Options?
Fullas also provides higher-output models that support gasoline, LPG and natural gas.
| Modello | Tipo di carburante | Potenza nominale | Max. Output | Gasoline Runtime at 1/2 Load | Noise Level |
|---|---|---|---|---|---|
| FP7000iS(E) | Benzina/GPL/GN | 6000W | 6500W | 8.5 hours | 63 dB(A) |
| FP8500iS(E) | Benzina/GPL/GN | 7200W | 7600W | 7 hours | 63 dB(A) |
| FP12000iSE | Benzina/GPL/GN | 10000W | 11000W | 9.5 hours | 60 dB(A) |
These models should be described as tri-fuel inverter generators o multi-fuel inverter generators, rather than only dual fuel models.
The FP12000iSE also supports single-phase and three-phase configurations, making it more suitable for higher-output and professional power requirements.
How to Choose the Right Model
Choose FP3500iS(E) when:
- A compact dual-fuel model is required
- Rated output of approximately 3.2kW is sufficient
- Lower product weight is important
- The generator will be used for outdoor activities, basic backup or mobile power
Choose FP4500iS(E) when:
- More continuous and starting power is required
- Longer gasoline runtime is important
- Wheels and handles are preferred
- The application includes larger appliances or professional equipment
Choose FP7000iS(E) or FP8500iS(E) when:
- The customer requires gasoline, LPG and natural gas options
- Rated output above 6kW is required
- The generator will support larger backup loads
- Electric and remote starting are important
Choose FP12000iSE when:
- Up to 10kW rated output is required
- Single-phase or three-phase configurations are needed
- Longer runtime and a larger fuel tank are important
- The buyer is targeting professional or higher-output backup applications
What Should Importers and Distributors Check?
B2B buyers should compare more than the advertised maximum wattage.
Important specifications include:
- Rated output on each fuel
- Maximum or starting output
- Gasoline and LPG runtime
- Engine displacement
- Fuel-selector design
- Recoil, electric or remote start
- Voltage and frequency
- Outlet configuration
- Noise-test conditions
- THD level
- Product weight
- Requisiti di certificazione
- Spare-parts support
- OEM branding and packaging
For sensitive electronic equipment, the THD specification is especially important. The Fullas models listed above are specified with THD of no more than 3%.
Can You Switch Fuels While the Generator Is Running?
This depends on the generator design.
Some dual-fuel generators allow relatively simple fuel selection, while others require the engine to be stopped before changing fuel sources. Do not assume that every model supports fuel switching while operating.
Always follow the instructions for the specific generator, including:
- Closing the original fuel supply
- Selecting the correct fuel position
- Connecting the LPG hose and regulator properly
- Checking for leaks
- Following the correct restart procedure
An official example of a gasoline/LPG dual-fuel inverter generator can be found on Generac’s dual-fuel inverter generator page.
Important Safety Reminder
Gasoline, LPG and natural-gas generators produce carbon monoxide and must not be operated inside a home, garage, warehouse, tent or other enclosed area.
The U.S. Consumer Product Safety Commission advises operating portable generators outside, at least 20 feet away from the home, with the exhaust directed away from windows, doors and vents. Working carbon-monoxide alarms should also be installed in occupied buildings.
Domande frequenti
Is a dual fuel inverter generator better than a gasoline-only generator?
It is more flexible because it provides two fuel options. However, whether it is better depends on the buyer’s budget, local fuel availability, required output and operating conditions.
Does a dual fuel generator use gasoline and LPG at the same time?
Normally, no. A dual fuel generator is designed to operate on either gasoline or LPG. The operator selects one fuel source according to the model’s instructions.
Does LPG produce the same output as gasoline?
Not necessarily. Rated and maximum output may change according to the fuel being used. Buyers should check the separate output specifications for each fuel.
Is a dual fuel inverter generator suitable for sensitive electronics?
It can be, provided the model supplies stable voltage, the correct frequency and sufficiently low THD. The total connected load must also remain within the rated output.
What is the difference between dual fuel and tri-fuel?
Dual fuel normally means two fuel options, such as gasoline and LPG. Tri-fuel means three fuel options, such as gasoline, LPG and natural gas.
Pensieri finali
A dual fuel inverter generator combines two useful functions: the ability to operate on gasoline or LPG and an inverter system that delivers controlled electrical output.
For buyers, the most important benefits are fuel flexibility, quieter operation, stable power and improved performance under changing loads. However, the right model should be selected according to rated output—not only maximum output—as well as runtime, fuel availability, noise level and target-market requirements.
Fullas offers the FP3500iS(E) e FP4500iS(E) as gasoline/LPG dual-fuel inverter generators. For customers requiring an additional natural-gas option, the FP7000iS(E), FP8500iS(E) e FP12000iSE provide multi-fuel configurations with rated outputs up to 10kW.
View the complete Serie di generatori con inverter Fullas to compare dual-fuel, multi-fuel, portable and high-output models.