New data on battery degradation in Tesla vehicles suggests that the batteries could retain most of their capacity even after driving 300,000 miles. The analysis looks at 350 Teslas around the world and has been started by the Dutch-Belgium Tesla forum.
Their public Google file collates data from Tesla drivers from all over the world. The latest data suggests that no more than 10 percent of battery capacity is lost over 300,000 kilometres.
Furthermore, most of the loss occurs during the first 100,000 kilometres, when degradation stands at about 5 percent. After that, capacity only declines gradually. The resulting trend line suggests that the average battery pack could cycle through over 300,000 km retaining about 90% capacity.