No, I'm not. The Tesla employee clearly stated, that this should trigger the balancing.
Balancing: over time, cells get out of balance, meaning some have a higher or lower voltage than the others. The BMS reads 100% when the first cell reaches 100% of a target voltage (which varies by model and battery vintage). If the cells are out of balance, there will be some with lower voltage at the point the BMS sees the first one hit target. This results in “missing” capacity. Balancing is a process of bleeding voltage from higher voltage cells to lowers voltage cells in order to level capacity. In Model S, it used to happen around 90%, so if you consistently charged less than 90, you would get out of balance over time and appear to lose capacity. Solution is to charge to 90+ several times. I’ve read that the newer cars balance well below 90%.
Calibration: the BMS can lose track of its estimate, so in order to allow it to “re-detect” the edges, you need to drain to a low state of charge, and recharge to a high state of charge several times in a row.
Degradation: the battery’s cells permanently lose voltage capacity.
when owners see a lower rated range, they often assume and (Mis) use the term “degradation”. By balancing and calibration, which are different but often confused (even by Tesla employees), owners can “restore” missing range. In the case of balancing, the BMS is actually increasing how much range the car has. In the case of calibration, it is only improving its guess.
this is not the first time a Tesla employee has been confused. They have grown immensely in the last 8 years, and most of the employees have a tenure of < 1 year, and do not own/drive a Tesla.
do not take as gospel what you hear from “a Tesla employee” nor what you hear in any single post on this forum. Do some fact checking.
