Long-term winter storage of an EV — what to do
If your EV sits parked for weeks or months, the battery needs different care than a fuel tank does. We explain how to prepare it properly.
If you're planning to leave your EV unused for an extended period — for example while traveling abroad or during seasonal use of a second car — the battery needs a different preparation approach than leaving a combustion car with a full tank.
Optimal charge level for storage
Unlike the habit of charging to 100% before a trip, for long-term storage manufacturers usually recommend a charge level between 50% and 80%. Storing at a full or nearly depleted charge accelerates long-term battery degradation more than storage in the mid-range.
Turn off or limit background systems
Modern EVs run background systems (telematics, app-requested climate control, security) that consume a small amount of energy even while the car is parked and switched off. For storage lasting months, it's worth checking the settings to minimize this background drain and avoid excessive battery discharge.
Temperature of the storage location
Storage at extreme temperatures — both very low and very high — accelerates the battery's chemical aging even without active use. If possible, choose a garage or enclosed space with a more stable temperature for long-term parking.
Periodic checks for very long storage
For storage longer than a few months, it's good practice to periodically check the charge level (remotely via the app, if available) and top up to the recommended range as needed, rather than leaving the car completely unmonitored for the entire period.
Tires and mechanical condition
Besides the battery, pay attention to the tires during long-term parking — staying in the same position for a long time can cause slight flat-spotting at lower pressure. Maintain the recommended pressure before putting the car into storage.
Conclusion
Proper preparation for long-term EV storage differs from the "full tank before a long break" habit with combustion cars. A charge between 50-80%, minimizing background drain, and a stable ambient temperature are the three key factors for a healthy battery on your return.
Browse more battery care guides on the FindVolta blog.