I set last night's overnight charge to 100%, but charging stopped at 97%. It did a similar thing last time I tried a full charge as well. Any idea what's going on or how to rectify?
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Happens to me all the time when I let it get below 20% then do a 100% charge. It ALWAYS recalibrates to 100% so don't worry.
Canuck
Well-Known Member
Hugh Mannity
Mediocre Member
Set your charge to 100% and it'll work its way back there after a few more charge cycles.
Hugh Mannity
Mediocre Member
Assume the answer is yes since I believe balancing happens above 95%?
The far more enlightened folk here will correct me if wrong.
yes, balancing occurs when you charge to 100% (probably above 93%, if I recall)
no screen shots, or details from op.. so, this is my hypothesis: the car did charge to 100%, then rebalanced and by the time he/she went to car, the car was indicating 97%: a combination of rebalancing and phantom losses.
Advice: activate the notifications on your mobile app, so that you get notifications when the car starts charging and is completed: you will get a notification with time of charge completion and % or miles present when charge completed. Sounds like battery needs balancing, so charge to 100% for three consecutive times (2 more times)...
Please report back with your findings
no screen shots, or details from op.. so, this is my hypothesis: the car did charge to 100%, then rebalanced and by the time he/she went to car, the car was indicating 97%: a combination of rebalancing and phantom losses.
Advice: activate the notifications on your mobile app, so that you get notifications when the car starts charging and is completed: you will get a notification with time of charge completion and % or miles present when charge completed. Sounds like battery needs balancing, so charge to 100% for three consecutive times (2 more times)...
Please report back with your findings
Hugh Mannity
Mediocre Member
I do receive notifications as charging completes. I was notified with Charging Complete 97%.
I think this just happened to me too. I got my 2015 model S about a month ago and had only charged it to 90%. I had read posts about balancing the cells by charging to 100% occasionally and that it wasn't too bad for the battery if you didn't leave it at 100% for long. So, since I needed to make a long drive yesterday I decided to go ahead and charge to 100% for the first time. I checked it about 1 hour after the charge had completed and was pretty surprised to see it at only 98%. I wasn't sure if it had actually charged to 100% and then lost 2% in an hour (which seemed pretty unlikely) or if it only got up to 98%, but I guess it was the latter. I have another longish drive tomorrow, so maybe I'll do another 100% charge and see if it actually gets to 100% this time.
jeffro01
Active Member
jeffro01
Active Member
Don't be obtuse... It's not battery degradation at all it's balancing and how the BMS handles that...
Jeff
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