Battery capacity (and range) degradation over time or distance traveled is one of the several main concerns in terms of electric cars. About 10 years ago, no one really knew how those new EVs would cope and some models were clearly underperforming (for various reasons).
Today, we will take a look at the official data from Tesla, which is extremely valuable because the company already has the most experience (in terms of the number of all-electric cars sold globally).
Tesla says that its battery packs were designed to outlast the cars. The average usage of private passenger cars (ICE) in the U.S. is 17 years and roughly 200,000 miles (322,000 km). The mileage in Europe is lower - about 130,000 miles (209,000 km). So, we have the first indication that the batteries should last longer than that.
Battery capacity is above 85% (on average) after 150,000-200,000 mile
After selling more than 1 million electric cars, Tesla's battery degradation data shows that vehicles with mileage between 150,000-200,000 miles (241,000-322,000 km), on average, still have more than 85% of initial battery capacity (the battery degradation is below 15%).