Tesla overcharge?

[bktiger86]

Hi all. Happy Holidays. I kinda want to do a poll to find out has anyone been experiencing the same "issue" as I am. I am not sure if this is an issue I need to bring up to the service center but lets say the night before I will set a charge of 90%. However, the next morning I wake up...it will charge sometimes to 95 or in this case 98%.

It doesn't happen all the time. Any thoughts?

 

[gaswalla]

2 years into model 3 ownership - yep happens to me occasionally. I think it’s due to the temperature changes from overnight to daytime and rebalancing

 

[ran349]

Hi all. Happy Holidays. I kinda want to do a poll to find out has anyone been experiencing the same "issue" as I am. I am not sure if this is an issue I need to bring up to the service center but lets say the night before I will set a charge of 90%. However, the next morning I wake up...it will charge sometimes to 95 or in this case 98%.

It doesn't happen all the time. Any thoughts?

It shouldn't happen. Certainly not 90% to 97%. I would bring it up with the service center. Also, you should watch it sometime to see if it stops at 90%, and then resumes later, or something else is going on.

 

[ShawnA]

Hi Bktiger86,

I have seen some other reports of this on some of the recent software 2019.36.x.x
Are you charging on a HPWC?
If you are on 2019.40.2.1 and are still having the problem contact your Service Center.

Shawn

 

[bktiger86]

I am using the HPWC. The firmware version is 2019.40.2.1. I will keep an eye on it to see if happens more consistently.

 

[NoirMS]

Hi all. Happy Holidays. I kinda want to do a poll to find out has anyone been experiencing the same "issue" as I am. I am not sure if this is an issue I need to bring up to the service center but lets say the night before I will set a charge of 90%. However, the next morning I wake up...it will charge sometimes to 95 or in this case 98%.

It doesn't happen all the time. Any thoughts?

never experienced this.... 15 months owning a cpo 2015 ms..... I read this thread and the next night (last night) I overcharged.... barely but it did happen...
still on v9...
weird...

 

[bktiger86]

Very interesting...yeah I'm not sure if it is weather related or not. I live in California and lately it has been pretty cold in my garage.

 

[NoirMS]

Very interesting...yeah I'm not sure if it is weather related or not. I live in California and lately it has been pretty cold in my garage.

def not weather for me... had the car too long and been through all 2 seasons we have, lol... I'm still simply blown away that I woke up to my 1st ever overcharge after reading this thread about overcharging for the 1st time....
will be monitoring next few charges and will post any anomalies....

 

[beatle]

Do you have a service like TeslaFi that can monitor the charging? This can give you a bit better insight as to what is happening.

 

[SeminoleFSU]

Hi all. Happy Holidays. I kinda want to do a poll to find out has anyone been experiencing the same "issue" as I am. I am not sure if this is an issue I need to bring up to the service center but lets say the night before I will set a charge of 90%. However, the next morning I wake up...it will charge sometimes to 95 or in this case 98%.

It doesn't happen all the time. Any thoughts?

This happened to me for the first time in years of ownership (two cars since 10/2013) when I tried the new "depart at" option in the charging scheduler. Once I realized it was still charging even when the car was at or above the charge limit I had set, I immediately went back to my the start charge at 2am option and it hasn't happened again since.

 

[JohnnyLounge21]

This happens to me periodically. Came on here to see if there was anything to be alarmed at. Kinda makes no sense and is a little annoying. . .

As per below, it overcharged the car pretty significantly. I use a bunch of different Level-2 chargers when I fill up at different places. Maybe that has something to do with it? I dunno - the car should know where it's set to fill to and STOP it where it's set. End of story. . .

 

[ucmndd]

This happens to me periodically. Came on here to see if there was anything to be alarmed at. Kinda makes no sense and is a little annoying. . .

As per below, it overcharged the car pretty significantly. I use a bunch of different Level-2 chargers when I fill up at different places. Maybe that has something to do with it? I dunno - the car should know where it's set to fill to and STOP it where it's set. End of story. . .

View attachment 777081

“238 miles added during last charging session”

This is why, your battery was almost completely empty when you started charging.

In recent firmwares, it seems relatively common for the car to suddenly “lose” about 5% state of charge within an hour or so of parking with a low battery (less than ~20%).

Then it starts charging, charges to your set limit, and at some point after that the “missing” 5% suddenly comes back, resulting in the appearance the car charged past its set point.

I can’t explain why this happens, only comment that it seems to be common, and seems to be harmless. More examples in this thread, and others:

Battery level decrease and increase while parked

Battery level of my S 90D 2016 usually decrease few % per day, unless it passes 12%, then decreasing 1% per hour until 5% while parked. Then charging until 80%, charching stopped and next hours the level increase until 84%. Anybody has explanation for this phenomenon?

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