Odd charging behavior

[steilkurve]

Have noticed a few times now that my X keeps taking on power even past the set SOC. Car was set to 90% and I get in after a night plugged in and it’s at 93%. Today, I get in the garage and see the HPWC is working. Get in the car and it’s at 82% on a setting of 80%. Again, the car showed power being drawn. Car was locked both times and no preconditioning taking place. Anyone else? What’s up?

 

[ShawnA]

Hi Steilkurve,

There was some peculiar charging behavior around December (2019).
It was thought to be software related.
If you are current 2020.8.1 your charge behavior could be / should be better...

Also there may have been peculiar charging behavior related to "scheduled" charging.

Please check your software - if you are current try a reboot.

Good luck,

Shawn

 

[tedsla]

Hello,

I have a 2016 MX and 2018 M3 both on 2020.4.1.

I have noticed this +1 or 2% behavior on home charging, a few times. When I display Miles instead of percent it seems to jump around a bit. I have noticed 3 or 4 miles of range to suddenly disappear when the car goes to sleep and then reawakens. Weird - hope it goes back to normal after next update.

 

[Tdreamer]

Have noticed a few times now that my X keeps taking on power even past the set SOC. Car was set to 90% and I get in after a night plugged in and it’s at 93%. Today, I get in the garage and see the HPWC is working. Get in the car and it’s at 82% on a setting of 80%. Again, the car showed power being drawn. Car was locked both times and no preconditioning taking place. Anyone else? What’s up?

I had an odd issue linked to the use of the somewhat recently added scheduled departure feature. (Charge port red after successful HPWC charge completion). While my symptom was a charging fault after successful completion of the overnight scheduled charge, Tesla ultimately confirmed there was a bug that would sometimes manifest itself in charging beyond the setpoint which sounds like what you are seeing. See post #14 in that thread for the message Tesla ultimately sent confirming the bug. As with most bugs, there was no suggestion of when it would be fixed.

 

[steilkurve]

Hi Steilkurve,

There was some peculiar charging behavior around December (2019).
It was thought to be software related.
If you are current 2020.8.1 your charge behavior could be / should be better...

Also there may have been peculiar charging behavior related to "scheduled" charging.

Please check your software - if you are current try a reboot.

Good luck,

Shawn

I’m on 2020.8.1 and the ‘incidents’ have happened before and after this update.

 

[ShawnA]

Hi Steilkurve,

Sorry to hear that the current software has not helped.
In December I had the opposite problem - The charge would
consistently stop as "complete" before the set limit...
For me it was resolved with the 2020.x.x software.

Good luck,

Shawn

 

[Hebert]

This started happening to me sometimes after I started using scheduled departure. It seemed to happen most often when I left a few hours after my set departure time. I switched to start charging at a set time and have not had any more occurrences. Hopefully that will work for you also.

 

[steilkurve]

This started happening to me sometimes after I started using scheduled departure. It seemed to happen most often when I left a few hours after my set departure time. I switched to start charging at a set time and have not had any more occurrences. Hopefully that will work for you also.

Interesting you say that. This is one of the things I tried after noticing the second occurence of overcharging and have not seen it since.

What's also interesting is that I have a 3 as well and Depart At doesn't seem to create problems on that car. Maybe it's the older gear in my X? At any rate. I'll see if that fix holds. Thanks.