-
Want to remove ads? Register an account and login to see fewer ads, and become a Supporting Member to remove almost all ads.
Loss of battery charge when on driveway
- Thread starter bl0ckev
- Start date
fancealot
Member
1. Was it still plugged in?
2. Do you have sentry mode on even if at home?
3. Did you pre-heat the car?
The weather being cold does sap some juice out of the battery - was at 39% when parking the car at center parcs last week, when I went back to the car a 5 days later it was at 36% all due to cold loss.
On the drive I always leave it plugged in just to top up every night if I get some loss due to low temps
Sentry mode I leave off unless parked somewhere a bit risky if i'm concerned about battery life.
2. Do you have sentry mode on even if at home?
3. Did you pre-heat the car?
The weather being cold does sap some juice out of the battery - was at 39% when parking the car at center parcs last week, when I went back to the car a 5 days later it was at 36% all due to cold loss.
On the drive I always leave it plugged in just to top up every night if I get some loss due to low temps
Sentry mode I leave off unless parked somewhere a bit risky if i'm concerned about battery life.
Answer is No to all - which worries me specifically on #2 and #3
Feels like after 5 days at centre parcs for me it would be totally dead at a rate of 8% per day
I've noticed this recently too - I don't think its anything wrong with the car.
Recent updates have included a lot of flip flopping on "cold weather improvements" - there have been issues in very cold climates with heating failure which Tesla seem to be having problems root causing (some say its the heat pump, some say its a sensor, some say its an air flap). and have been trying to address via software. My experience has been this drain coming and going with various software updates.
I think this has resulted in a number of software changes that affect the way the car behaves when its parked on the drive and the focus has been on solving the heat failure issue. A little bit of excess battery drain is probably not considered as important and I would expect/hope/believe this would be addressed by another software update "sometime".
Recent updates have included a lot of flip flopping on "cold weather improvements" - there have been issues in very cold climates with heating failure which Tesla seem to be having problems root causing (some say its the heat pump, some say its a sensor, some say its an air flap). and have been trying to address via software. My experience has been this drain coming and going with various software updates.
I think this has resulted in a number of software changes that affect the way the car behaves when its parked on the drive and the focus has been on solving the heat failure issue. A little bit of excess battery drain is probably not considered as important and I would expect/hope/believe this would be addressed by another software update "sometime".
Sorry - M3P 2 months oldNeed more info really.. you haven't even said which car you've got or how old it is.
+1 to this.
Without standing next to your car it's pretty much impossible to tell whether it's asleep or not. Unfortunately, opening the Tesla app - even if it just gets to the logo animation - will wake the car up.
You can end up in a bit of a weird situation where you need a third party app to tell whether your car is asleep or not, but that third party app (if misconfigured) could itself keep the car awake. Intuitively losing that amount of charge would suggest to me that the car isn't going to sleep properly, or is waking up several times.
if you are using third party apps I would suggest changing your password and then repeating the test, ideally with the same weather conditions, and seeing what the battery % loss is like then. I would also hasten to add that in this weather the difference in battery % between a cold battery and one up to temperature (i.e. after you've finished charging it) could be a few degrees. As I write this TeslaMate is telling me there is a 2% delta between the current charge percentage and "preconditioned" state - and it's not sub zero here at the moment.
Yes thats the one, I had mine as "always" as tends to work a little better for the "key" operation but if its means it randomly wakes the car then I'm not sure its worth the battery drain
fancealot
Member
My location is set to always.
I did note when I got home friday evening I saw an update was pending for install, could be if it was unplugged it needed a bit of battery power to download the update?
All historic updates tend to ask permission before downloading and there wasnt any to install Sunday evening or yesterday.
Louis0w
Member
When you entered the car before your short journey, do you remember if the blue snowflake was showing next to the battery %? This time of year, especially if the car is sitting idle for days, it's usual for the battery to be cold. When this occurs, the car will intentionally hold some capacity back until the battery has been sufficiently warmed, whereby it will give return the capacity back to you, so the % charge first indicated will appear to be less. It's explained in the manual :
No, there was no snowflake icon but great to know. Thanks for sharing
Last edited:
Similar threads
