Does the Battery Drain?

Leaving an electric car unused in a garage for an extended period requires some specific precautions, especially regarding the battery. All batteries, including those in electric vehicles (EVs), experience a gradual energy loss over time, even when not in use. This phenomenon, known as self-discharge, occurs in all battery systems. However, in most modern EVs, this process is relatively slow.

What Happens to an EV Battery Left in Storage?

When an electric car sits idle in a garage for a long time, the following issues may arise:

1. Self-Discharge: Although modern EVs are equipped with battery management systems (BMS) to protect the battery, a small amount of energy loss still occurs over time.
2. Damage from Full or Empty Charge Levels: Keeping the battery at 100% charge or letting it drop to 0% for an extended period can negatively affect battery health.
3. Degradation from Inactivity: In addition to the battery, other components of the vehicle may deteriorate due to lack of use.

Best Practices to Maintain Battery Health

If you plan to store your electric car for an extended period, follow these best practices to preserve battery health:

1. Maintain a Moderate Charge Level

Keep the battery charged between 20% and 80%. Avoid leaving it fully charged or completely discharged for long periods.

2. Check Regularly

Inspect your car at least once a week to monitor the battery level and recharge it if needed.

3. Control the Storage Temperature

Extreme temperatures can damage the battery. Try to store the car in a garage with a moderate and stable temperature.

4. Use Built-in Storage Features

Many EVs come with features like “Storage Mode” to optimize battery management during long-term parking. Enable these features if available.

5. Move the Car Periodically

If possible, drive the car for a short distance once a month. This helps maintain both the battery and other vehicle components in good condition.

Additional Tips for Prolonging Battery Life

• Scheduled Charging: Even if the car is unused, recharge the battery periodically to keep it in the recommended range.
• Software Updates: Stay updated with your vehicle’s software to ensure the battery management system works efficiently.

Conclusion

Electric cars can stay idle in a garage without significant issues if proper care is taken. By following the tips above, you can extend your EV battery’s lifespan and avoid unexpected problems. A little planning goes a long way in maintaining the health of your electric vehicle.