Charge Limit Ignored

[ptbeale]

Recently, I've noticed that my Model S is ignoring the charge limit that I have set. Each morning I find the car charged well beyond the 85% limit that I have set.

I do have "scheduled departure" enabled and I'm wondering if this is possibly the culprit. The scheduled departure time is much earlier than I have actually been leaving the house. Possibly there's a bug that fails to stop charging in this case?

Has anyone else noticed similar behavior?

-Pete

2017 - Model S 75D w/2020.4.1.4a4ad401858f

 

[Obsoletion]

Yep, same here on both of mine. I stopped using scheduled departure because of it.

 

[boaterva]

Never have this problem. Always charges to (limit of) 90% exactly. Only time I’ve seen overcharge is after a firmware load and I forgot to reboot. Tried that?

(3 uses scheduled; X doesn’t, both charge correctly)

 

[AustinP]

Same here but the other way round: it never reaches the limit set
At first it missed like 10% (80 instead of 90), so I could live with it, but once it barely charged to 70%.
As many people also report if work great, I guess there is something specific in my car that is not handled correctly, and there is hope for a solution.
I documented it (screenshots day before and next morning) and sent all to Tesla, so I'm patiently waiting for that one future update that will fix it.

 

[chrisgla]

I noticed this once recently on P90D. Left car at 7kW airport charger, came back and when driving noticed range was through the roof. Car had charged to 100%, had been set to 90%

 

[David99]

It will do it if there is a destination in the navigation system and it requires a higher charge level to get there than set. But I don't think that's the problem here.

 

[Dypkny845]

It has to be a bug. I noticed my 100% charge limit being ignored and would not stop charging. Once it hit 100% it slows down to about 5amp an hour

 

[David99]

It has to be a bug. I noticed my 100% charge limit being ignored and would not stop charging. Once it hit 100% it slows down to about 5amp an hour

The battery can't be charged more than 100%. When the car switches from 99 to 100% the true percentage is actually 99.5%. It i just rounded up. The car will continue very slowly until you have true 100% and then shut off. Same any other specific value. Say you set it to 88% the car will shut off at exactly at 88.0% but the display will show 88% when it is actually 87.5%.