Can an Electric Car Be Charged While Being Towed? Unveiling the Facts

Many wonder if an electric vehicle (EV) can be charged while being towed. This curiosity stems from the desire to make the towing process more efficient and potentially refill the battery in the process. In this article, we will explore the possibilities and limitations of charging an electric car during towing, focusing on its capabilities and the reasons why it might not be recommended by manufacturers.

Introduction to Charging an EV While Being Towed

Technically, it is possible to charge an electric car while being flat-towing it. However, this method is not without its limitations and risks. This section will delve deeper into the process and explain why it is often discouraged by manufacturers and EV owners.

Flat-Towing: A Possibility for Charging

Under certain circumstances, an electric vehicle can indeed be charged while being towed. This is achieved through the use of regenerative braking, a feature designed to harness the kinetic energy from braking and convert it back into electrical energy. Here's how it works:

Condition 1: The car needs to be switched on, and the vehicle must be moving, preferably in "drive." Condition 2: Regenerative braking needs to be enabled. On my older Nissan Leaf, for instance, regenerative braking is activated by setting the selector to the "B" position. Condition 3: All wheels, or at least the driven ones, need to be on the road. This maintains traction and allows the EV to benefit from regenerative braking effectively.

To execute this, the car is connected to the tow vehicle through a tow rope, with the driver maintaining a fixed distance from the tow vehicle. The EV's engine needs to run to enable the necessary systems for regenerative braking. While this method might seem simple, it is essential to ensure that the car has a dedicated tow bolt for proper safety and to prevent damaging the vehicle's bumper or suspension.

Why Manufacturers Do Not Recommend Towing an EV

Despite the potential for regenerative braking to charge an electric car during towing, several factors make this method less favorable and more risky:

Manufacturers' Recommendations: Most electric car manufacturers discourage the flat-towing of their vehicles. Instead, they recommend using a trailer or towing all wheels off the road. This is because the control system of EVs is not designed for extended towing. The risk of damaging the vehicle's delicate electronics and causing potential malfunctions increases significantly. Hassle and Safety Concerns: Flat-towing an EV is a hassle. It requires continuous monitoring and adjustments to maintain a constant distance from the tow vehicle. There is also the added risk of maintaining tension on the tow rope while accounting for the tow vehicle's braking and traffic signals. This can be quite alarming and requires a high level of attentiveness. Local Laws and Regulations: Some regions may have specific laws or regulations regarding the flat-towing of vehicles, which could restrict or prohibit this practice. It is crucial to consult local traffic and transportation laws to ensure compliance with the law.

The risk of attempting to charge an EV through regenerative braking during towing also comes with potential hazards. The system is not designed for full charging, and forcing too much charge back into the battery can cause overheating and a higher risk of fire. This inefficiency and increased risk make the method less practical and more dangerous than other charging solutions.

Alternatives to Charging an Electric Car While Towed

Given the limitations and risks associated with flat-towing, it is advisable to use more reliable methods to keep your electric vehicle charged. Here are some alternative options:

Regular Charging Points: Always keep an eye on your EV's battery level and plan your journey to include charging stops. Range Estimation: Use car range estimation tools to predict how far your EV can travel based on current conditions. This can help you avoid running out of charge unexpectedly. Quick Charging Stations: Utilize quick charging stations along your route to ensure that you can recharge rapidly when needed.

Conclusion

In summary, while it is technically possible to charge an electric vehicle while being towed, it is not a recommended practice due to the risks and limitations associated with flat-towing. Instead, focus on regular charging, proper range management, and using quick charging stations to keep your EV fully charged and ready for any journey.

By understanding the capabilities and limitations of EVs, and by following the manufacturer's guidelines and local regulations, you can ensure that your electric vehicle remains in optimal condition and safe to drive.