The convenience and extended range offered by electric vehicles (EVs) are undeniable. However, range anxiety remains a concern for some drivers, especially during long road trips. This has led to the exploration of alternative charging solutions, including the concept of flat-towing EVs to recharge their batteries.
This blog delves into the feasibility of flat-towing EVs for recharging, exploring the technical aspects, potential benefits, and important considerations.
1. Can You Flat Tow EVs to Recharge Them? Yes, but There Are Asterisks:
While flat-towing an EV might seem like a straightforward way to generate electricity through its regenerative braking system, the reality is more nuanced. Here’s why:
- Limited Regen Potential: Regenerative braking in EVs recovers a portion of the kinetic energy lost during deceleration, converting it back into electricity. However, the amount of energy recovered through flat-towing is minimal compared to what’s generated during regular driving with frequent braking.
- Vehicle-Specific Compatibility: Not all EVs are designed or equipped for flat-tow charging. Manufacturers may have specific guidelines or restrictions regarding this practice, and exceeding them could void warranties or damage the vehicle’s drivetrain.
Therefore, while flat-towing for recharging is technically possible in certain situations, it’s crucial to consult your vehicle’s owner’s manual for specific instructions and compatibility information.
Related: Can you flat tow an electric car?
2. What Mode Should the EV Be In?
For EVs that allow flat-tow charging, the recommended driving mode might vary depending on the manufacturer’s specifications. Some common recommendations include:
- Neutral Mode: This is often the preferred mode, allowing the wheels to spin freely and engage the regenerative braking system.
- Tow Mode: If available, this mode might be specifically designed for flat-towing and optimize energy recovery.
It’s essential to follow the manufacturer’s guidelines to ensure safe and efficient operation during flat-towing.
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3. At What Rate Does Flat-Tow Charging Occur?
The rate of electricity generation through flat-towing is significantly slower compared to traditional charging methods like Level 2 or DC Fast Charging. Factors like towing speed and the vehicle’s regenerative braking capabilities influence the charging rate.
While it might not be enough to fully recharge a depleted battery, flat-towing can potentially provide a slight range boost or help maintain the current charge level while traveling.
4. Bi-Directional “Jump Charging”
While flat-towing primarily relies on the EV’s regenerative braking system, the concept of bi-directional charging offers another potential avenue for recharging while being towed. This technology allows EVs to act as power sources, potentially transferring some of their stored battery power to another EV in need.
However, bi-directional charging technology is still under development and not yet widely implemented in commercially available EVs.
5. Where to Fasten the Tow Rope?
When flat-towing an EV, it’s crucial to use the designated tow points specified in the owner’s manual. Using incorrect attachment points can damage the vehicle’s frame or towing components.
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6. Potential Dangers of Flat-Tow Charging:
Despite its potential benefits, flat-towing for recharging EVs comes with inherent risks:
- Overheating: The continuous operation of the regenerative braking system while towing could lead to overheating, potentially damaging the electric motors or battery.
- Drivetrain Strain: Flat-towing can put additional stress on the EV’s drivetrain components, especially at higher speeds or over extended distances.
- Warranty Voiding: Improper flat-towing techniques or exceeding manufacturer guidelines could void the vehicle’s warranty.
Therefore, it’s crucial to exercise caution and strictly adhere to the manufacturer’s recommendations to minimize potential risks.
7. Ford Patent: Battery Charging by Towed Regenerative Braking:
Recognizing the potential of flat-tow charging, Ford has filed a patent for a system that utilizes towed trailers equipped with regenerative braking systems to contribute to charging the towing EV. This technology, while still under development, could potentially enhance the range extension capabilities of flat-towing in the future.
While flat-towing for recharging EVs might not be a revolutionary solution for range anxiety, it holds promise as a supplementary charging method in specific situations. As EV technology evolves and bi-directional charging becomes more widespread, the future of recharging on the go might offer even more convenient and efficient solutions for electric car owners.
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FAQs: Can you flat tow an electric car?
Can I flat tow any electric car?
It depends! Always consult your car’s owner’s manual for specific instructions and limitations. Some EVs explicitly prohibit flat towing, while others allow it with certain precautions.
Why is flat-towing an EV different than a gasoline car?
Electric cars lack a neutral gear, and the rolling wheels can engage the motor, potentially draining the battery and causing overheating. Additionally, some EV braking systems might not function properly during towing.
Is it ever safe to flat tow an electric car?
It can be done in a pinch if your manual permits it and you follow all safety precautions (right tow bar, battery disconnect, short distance, etc.). However, prioritize professional towing whenever possible.
What are the 5 key tips for safe flat towing an EV?
Prepare the Tow Vehicle: Ensure it’s in good condition and can handle the weight of your EV.
Double-Check Connections: Inspect and secure the tow bar and safety chains before driving.
Monitor the Battery: Monitor the level and stop if it drains rapidly.
Use Caution on Hills: Avoid steep inclines and descents to minimize strain on the motor and brakes.
Get it Checked Out: After the tow, have a mechanic inspect your EV for any potential damage.
Are there alternatives to flat towing an electric car?
Yes! Consider professional towing services with experience handling EVs, using a trailer, or calling roadside assistance for a battery boost or repair.
What if my car manual doesn’t say anything about flat towing?
Err on the side of caution and avoid flat towing. Contact the manufacturer or a qualified mechanic for guidance.
