2021+ Battery Degradation
For those looking at your cars and wondering what is normal. This is data from Model S listings in the US right now. The battery health comes from a Tesla API. Notice the first 20,000 you lose about huge chunk of capacity. But also note, the degradation slows and then by about 40-50,000 miles it becomes a fairly minimal loss.
Feel free to ask questions or give feedback. I am planning to make a YouTube video with some info and this isn’t my favorite chart, but it’s unfiltered. The degradation curves are better - but saving that for the video.
Honestly - I went down this rabbit hole because my 2017 Model S with 80k miles has a SOH of 87%, but my 2021 Model S with 37k miles with a 86% SOH. It just didn’t compute - so I did the research and I’ll be damned if these batteries don’t seem to have a much steeper curb than the one for my old Model S. I learned a lot about the batteries and at least for myself I’m not too worried. Age - I’d gamble 14 years in the low end and high end could be 20 years for some lucky folks.