I’m currently out of town for the holidays and before I left I plugged my car in knowing that it would get below freezing while I was gone. I have a slow level 2 charger at home. I’ve been checking the level with the my Chevrolet app for five days and it’s been fine. This morning I woke up and it had charged to 93%. I’ll be back in two days but I’m wondering if I can use the app to run the car for an hour even though I’m hundreds of miles away just to reduce the amount of energy in the battery and let it turn itself off or should I just leave it as is. Thoughts?
Battery Charging past 80% when set to 80%
WhiteLux
41 - 53 of 53 Posts
Just had my EQEV mysteriously overcharge the car. Never had this happen before. I have about 5600 miles on it. The car is set to charge to 75% overnight and finish by 5:00AM, been set that way for months and has always worked. However today for some reason it showed a charge level of 97% when I got in it today.
Messages in the my Chevy app on my phone:
" Charging Started yesterday 3:40AM - Your 2025 Chevy EQ EV began charging at 3:39AM battery level is currently 71% and will charge to 75%"
"Charging complete yesterday 4:12AM - Your 2025 EQEV has completed charging"
No more messages from MyChevy App.
It couldn't have pumped in juice from 71% to 97% in only 32 minutes, right (level 2 240V 40A Blink in my garage)?
So my question is, Does the Chevy App always notify you of a charge event?
I am trying to figure out if the calibration was or is screwed up, or if there could have been an unreported charge event after 4:12AM yesterday.
Messages in the my Chevy app on my phone:
" Charging Started yesterday 3:40AM - Your 2025 Chevy EQ EV began charging at 3:39AM battery level is currently 71% and will charge to 75%"
"Charging complete yesterday 4:12AM - Your 2025 EQEV has completed charging"
No more messages from MyChevy App.
It couldn't have pumped in juice from 71% to 97% in only 32 minutes, right (level 2 240V 40A Blink in my garage)?
So my question is, Does the Chevy App always notify you of a charge event?
I am trying to figure out if the calibration was or is screwed up, or if there could have been an unreported charge event after 4:12AM yesterday.
There is a current bug that has been noticed lately where vehicles will charge past their set points. I believe it's a communications issue with the App.
Maybe might need a new software update?
My car charged past my 75% setting to 100% again last night (second time this has happened), but I believe I just figured out why!
I had gone on a 50 mile trip yesterday and while away, google maps lost connectivity. I navigated home without rebooting and plugged in.
After seeing it had charged to 100% this morning I noticed in the My Chevrolet App that there is a setting to set the target charge level AWAY FROM HOME.
The default is 100%, which is where mine was at. So the car assumed I was still away from home because my maps had stopped working, and charged to 100%.
So just be aware that if your map loses GPS connectivity your car may charge to the default "away from home" charge level even though you are at home.
I set my "away" charge level to 80% which hopefully will solve this problem.
I had gone on a 50 mile trip yesterday and while away, google maps lost connectivity. I navigated home without rebooting and plugged in.
After seeing it had charged to 100% this morning I noticed in the My Chevrolet App that there is a setting to set the target charge level AWAY FROM HOME.
The default is 100%, which is where mine was at. So the car assumed I was still away from home because my maps had stopped working, and charged to 100%.
So just be aware that if your map loses GPS connectivity your car may charge to the default "away from home" charge level even though you are at home.
I set my "away" charge level to 80% which hopefully will solve this problem.
A
And I believe that location for home needs to be updated every so often. I do it in my EUV like once in two or three months.
Google maps is not the cause, just a symptom. The car losing its location via GPS is the root cause of the issue.
Joined
·
7 Posts
I have had the same experience. I don't buy that it is a battery learning experience because the charging stops nicely at 80% the first day, but if I leave it charging for multiple days, the charging will begin to walk upwards. It seems like a software issue. I have not gone through a winter yet. I understand why it is helpful to plug the car in multiple hours before use in cold weather to precondition but I don't understand why it is necessary to leave it plugged in over multiple days in the wintertime if you are leaving town, etc.
It's used to keep the battery at a nice happy temp for battery management, not just before drives.
Joined
·
7 Posts
So this charging-percentage drift then becomes a bigger problem in the winter. Is there a threshold temperature below which heating becomes important, e.g. 0C?
I don’t think that @Nebula1701 is saying that. What he is stating is that leaving the vehicle plugged in, even after the vehicle has reached the target charge, provides the battery management system to feed off of the current from your EVSE and not from the vehicle’s battery.
I charge to 80 without issues. Stops exactly there. I have never left it in there overnight though.
Maybe try it with the L1 EVSE?
I have yet to see it do that. All of last winter in the NE outside and did not see the main battery do the thermal Management even though it was always around the 80% mark. It uses it unplugged until about 30% SOC I believe.
41 - 53 of 53 Posts
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
