It Is Known How Much the Capacity of EV Batteries Reduces During the Year

EV batteries lose their maximum capacity over time. The more often quick-charge devices are used, the less batteries work.

Geotab conducted research on 6300 fleet and consumer electric cars. The statistics show that, on average, battery degradation is not critical.

How much the batteries of electric cars wear out during the year How much the batteries of electric cars wear out during the year

Geotab discovered that the average battery capacity loss is 2.3% of the initial capacity per year. This means that most batteries will outlast the useable life of the vehicles that they power.

The experts give specific examples. The study involved two electric cars from different manufacturers: a 2015 Tesla Model S’s battery capacity fell by an average of 2.3% each year while the battery pack of a 2015 Nissan Leaf fell by an average of 4.2 per cent during this year. The experts explain that the reason for such distinction may lie in different principles of battery cooling systems; Tesla uses a liquid cooling system while Nissan relies on a passive air cooling system.

It Is Known How Much the Capacity of EV Batteries Reduces During the Year photo 2

Geotab notes that battery degradation is not linear. As a result, the decline may seem to be slow for several years but it may increase dramatically at some point. It is almost impossible to predict changes, as they are affected by many different factors.

The research also showed that the climate in which the electric car is operated also affects the rate of battery degradation: in a hot climate, batteries lose its capacity faster than in a cool one. Frequent quick charge also accelerates battery degradation but the frequency of charges does not affect this parameter.

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