ADAC, the biggest German automobile association, measured a Tesla Model Y’s battery health after 87,000 miles.
Its peak charging power fell from 257 kW to barely above 200 kW.
In 30 minutes, it now adds 13% less energy than when it was new.
Most of the EV battery degradation stories we cover come from owners testing their vehicles. This one is a lot more in-depth, since it was done by the ADAC (Germany’s equivalent of AAA), which has been running a Tesla Model Y as part of its fleet since the fall of 2022.
It has now covered 140,000 km, or around 87,000 miles, making it one of the busiest vehicles in the ADAC fleet. Even though it’s an EV, the automobile association says it was preferred for longer journeys because it can deliver up to 400 km (250 miles) on a single charge, thanks to an average measured efficiency of 21.2 kWh/100 km (2.93 miles/kWh).
