charging an electric car with a generator
The automotive industry has been going through a major transformation in recent years, with electric cars surging in popularity. It offers a clean, efficient driving experience that doesn’t pollute the environment with carbon fuel toxins. However, one challenge EV owners may face is ensuring access to charging facilities, especially in certain circumstances.
Which brings us to today’s topic: charging an electric car with a generator. It may seem unconventional, nor the most common way to charge an electric car. But in certain circumstances, it can be a viable option. Read on to learn how to charge an electric car with a generator and explore charging best practices, potential challenges, and safety measures.

Why use a generator to charge an electric car?
- Limitations of the charging infrastructure include the following:
- Charging stations are not evenly distributed, and finding an electric car charging station can be difficult. If your battery runs out while you’re out, it may take some time to find a charging station.
- If you live in a rural or remote area, charging stations may be limited.
- There may be queues at popular locations
- Charging speeds vary
This is where generators come in handy, and you can use them to charge your electric car’s battery.
Feasibility and practicality of using a generator to charge an electric car
Can electric cars be charged with a generator? Most electric cars can be charged with any electricity, as long as that electricity is supplied in a way that is compatible with the car. They can be charged from a generator, but electric cars cannot be charged while driving. As with any solution, there are pros and cons to charging an electric car with a generator.
Advantages
- Emergency backup: Generators can come in handy during power outages. It can be an emergency backup solution if the grid fails. It can also be used for off-grid charging, using electric cars in remote areas
- Flexibility and convenience: Generators offer flexibility. They are ideal for long trips, camping vacations, and places where there are no electric car charging stations, as they can be used anywhere and at any time.
- Extended range: Generators can extend driving range in areas with limited charging stations.
Disadvantages
- Efficiency issues: Charging an electric car via a generator is less efficient than charging directly from the grid. Generators convert fuel (gasoline, propane, or diesel) into electricity, and energy is lost.
- Environmental impact: One of the main advantages of electric cars is that they are less harmful to the environment than internal combustion engine cars. Using a generator to charge an electric car, the emissions from fuel combustion contradict this advantage.
- Cost: Generators may be cheap at first, but over time, operating costs increase, especially for maintenance and possible repairs. In addition, a constant supply of fuel is required, and fuel costs are generally higher than the cost of grid power.
- Noise pollution: Can be a problem in quiet areas.
Finding the right generator
Using a generator to charge your electric car may be convenient, but the right generator is essential to ensure efficient and safe charging. Here are some important things to consider:
Types of generators
When considering a generator for charging your electric car, it is important to evaluate the different types available, each with their own advantages and disadvantages.
- Gasoline generators: Gasoline generators are widely available and portable, making them a popular choice for charging electric cars. Their lower initial cost compared to some alternatives adds to their appeal.
- Diesel generators: Diesel generators are known for their high efficiency and long run times. Ideal for larger electric cars or situations where faster charging is required, they offer higher power outputs. Their powerful power typically starts at 5,000 watts.
- Inverter generators: Great for sensitive electronic devices, they provide steady, clean power. Inverter generators typically range from 2,000 to 5,000 watts, making them suitable for home charging or light-duty needs.
It is highly recommended to use a pure sine wave inverter generator rather than a modified sine wave generator. The quality of power generation is the reason. Pure sine wave generators produce electricity comparable to that produced by the grid. Sensitive electronics, such as those in electric cars, require this power. Using a modified sine wave generator could damage the electronics in your car.
Generator sizing
Start by matching the generator’s output to the car’s charging needs. You’ll need to consider the EV’s charging specifications including the required charging wattage and any specific adapter requirements, as well as the total amperage and wattage the generator provides. It’s difficult to determine the minimum size needed for EV charging because there are so many factors.
Look for a generator with enough power to support your EV charging system. Understand the difference between continuous power output (what the generator can sustain for a long period of time) and surge power (extra power provided for short bursts). Making sure the generator can handle both types of power needs will help prevent any problems during charging.
A 7kw inverter generator can charge a typical 60kWh EV battery from empty to full in 8 hours. An inverter generator rated at 3.7kW will take about 16 hours.
Environmental impacts
Using a generator to charge an EV can have an environmental impact through emissions and fuel consumption. Fuel costs can also add up over time, especially if you use the generator frequently. It is estimated that a small electric car requires ten to twenty gallons of gas to fully charge. Whenever possible, choose a generator that runs efficiently and produces fewer emissions.
By following these guidelines, you can effectively use a generator to charge your electric car while being mindful of safety and environmental considerations.
Step-by-step guide to charging an electric car with a generator
Charging an electric car with a generator can seem daunting, especially if you’ve never done it before. Charging an electric car with a generator is simple if you follow the steps below carefully.
The main challenge you face is consistency. Before charging an EV with an inverter generator, you should:
- Consult your car owner’s manual for information about specific charging requirements and safety precautions for electric cars.
- Check the features and capacity of the generator you are considering.
Using an EV’s onboard charger
Most electric cars come with an onboard charger that automatically manages the charging process. The system regulates the charging rate and monitors the battery level to ensure safe and efficient charging.
Not every electric car is the same, and some have limitations or require unique adapters to charge with a generator. Be sure to check the manual that came with your electric car for advice.
Setting up the generator
- Choose a safe location: Place the generator outdoors in a dry, flat area away from buildings, cars, or flammable materials to minimize the risk of fire.
- Observe safety precautions: Make sure the generator is in good working order, check for fuel leaks and that the connections are secure. Keep a fire extinguisher nearby.
- Ensure proper ventilation: Operate the generator in a well-ventilated area, away from any windows or vents to prevent carbon monoxide buildup.
- Avoid overloading the generator: Make sure the rated power of the generator is not exceeded to prevent overheating and damage.
- Use the correct cable for connection: Use a compatible electric car charging cable, which may be a standard Level 1 or Level 2 charging cable, to prevent overheating.
- Generators need to be grounded: For most devices, the generator frame serves as an adequate grounding source.
Connecting the car
Plug one end of the charging cable into the output of the generator and the other end into the charging port of the electric car, making sure the connection is secure.
To avoid electric shock, make sure all connections are secure and that the generator’s current is properly grounded before turning on the generator.
Start the generator according to the manufacturer’s instructions. When the electric car is available, start at the lowest charge rate, as it prevents overloading and protects the generator.
Monitor the charging process
Check the generator regularly during the charging process. Monitor the generator’s power output, adjusting the settings as needed to the requirements of the electric car. Monitor the fuel level to ensure the generator has enough fuel to complete the charge. Keep a close eye on the temperature and performance of the generator to detect potential problems before they escalate.
Keep an eye on charging time using your electric car’s dashboard or timer to ensure the generator is running long enough to complete the charge. It’s important to remember that charging with a generator takes much longer than charging at a regular charging station.
By following these steps, you can safely and efficiently charge your electric car with a generator.
Conclusion
Using a generator to charge your electric vehicle is a practical solution, but always keep safety in mind. From choosing the right generator type and size to using the right adapter and following the step-by-step instructions, every detail is critical to ensuring successful charging.
As a professional generator manufacturer in China, MATCHUP encourages electric vehicle owners to stay informed about the various charging options and consider adding our generators to your backup power supply list when necessary. Our company is committed to developing efficient and reliable generators to meet changing needs.
Remember that while generator charging is a valuable option, it is best used as a supplement to regular grid charging.
May Ge
Outdoor Machinery Export Manager 6-Yr Exp 🌍 ∣ BSCI, EPA, EURO V, CE ∣ Generator, High-pressure Washer, Water Pump, Engine, Floor Scrubber ∣ 🚀 24/7 Second Reply
TAIZHOU BISON MACHINERY CO.,LTD | Ningbo University of Technology
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