Climate, parking and long-term storage
Protecting a pack when the car is not being used.
You'll learn
- Explain climate, parking and long-term storage at engineering level
- Read the numbers that define the behaviour
- Apply the idea to a real pack
Overview
Calendar ageing depends on two things you control while parked: state of charge and temperature.
In depth
- Store at 40–60% state of charge for long periods
- Park in shade or a garage in hot climates
- Leave the car plugged in so the BMS can maintain the pack
- Avoid leaving the car at 100% for days
- Check state of charge monthly during extended storage
See storage effects
Raise the average climate and time spent above 90% and watch state of health fall.
Years of ownership8 yr
Annual mileage15,000 km
Pack capacity75 kWh
Rapid charging share20 %
Average climate20 °C
Time parked above 90% SOC30 %
Estimated SOH
91.4%
Capacity remaining
68.5 kWh
Capacity lost
6.5 kWh
Range lost (at 18 kWh/100 km)
36 km
State of health over time
0 yr8 yr
Stays above the 80% warranty threshold for the whole period modelled.
Key takeaways
Remember this
- Store cool and mid-charge.
- Time at high SOC and high temperature is the worst combination.
- Plugged-in parking lets the BMS look after the pack.
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