EV battery state of health drops 1pc every 25,000km, Arval finds

The State of Health (SoH) of electric vehicle batteries degrades at a rate of one per cent for every 25,000km, after a larger initial decrease, according to newly published data from leasing and fleet management firm Arval.

EVs tested with 160,000km or six years of use had a battery SoH figure of above 90 per cent. At 70,000km, a battery displays 93 per cent remaining capacity on average.

Arval said that newer generation EV models typically showed battery health figures two or three percentage points higher than older models, benefiting from improvements in design, cooling, and energy‑management systems.

The research was based on 24,000 battery health certificates from across 11 European countries, covering a mix of full-EVs (66 per cent) and plug-in hybrids (33 per cent).

Pascal Seeger, global remarketing director at Arval said the data is “very good news for used car buyers”.

“By providing consolidated and comparable data, we help remove barriers to buying used electric vehicles and accelerate the development of a more transparent and reliable market,” he added.