gregincal
Active Member
My battery readings are down 13%. Tesla service says it is due to my charging pattern and asked that I always charge to 90% and not charge again until it gets down fairly low. This is supposed to train the battery management system to give more accurate readings of capacity. So, I now charge to 90% and don't plug-in again until it gets to ~30% unless I plan a trip beyond the remaining range. If I am opportunity charging, and I have enough time, I might charge to 95% or so since I will be driving it down right away; can't do that at home since I need regen for steep hills — even 90% reduces regen by a lot. Charging above 93% is supposed to help balance the cells in the battery pack; I don't know if that is true.
You asked...
It sounds like you weren't charging to 90% previously. The draining part you need to do a couple times to retrain after a long period of not charging to 90%, but after that you can plug in every night and charge to 90% and it will stay accurate (spoken from personal experience).