2019.5.15 - Car topping up charge every 45 min to 1hr

[Techniques]

Has anyone else notice this? got the update today and have notice the car is topping up its charge from 89 - 90%.
I do have sentry mode on, but found a reddit article with someone claiming the same behaviour with Sentry turned off.

2019.5.16 update charging every 56 minutes while idle : teslamotors

 

[akidesir]

I saw this last night after I installed the update at 9pm. 3 times overnight it started charging again for a percent or two after it already hit it's charge threshold.

 

[pcons]

Maybe it's topping up to offset the phantom losses? I typically don't plug in every night but have noticed quite often the charge finishes at 90%, but then in the morning it could be down to 88% and range is at ~440km. I've had it go down as to as much as 436km while still plugged in. I'm not on the new firmware yet.

 

[MikeS1]

Set it on a schedule...

 

[TiggerTime]

I did notice that with Sentry on it drained about 2 miles per hour. I turned it on when I got to work today was not charging and when I moved it about 6 hours later to a charger it was about 12 miles less than when I parked. I haven't tracked it when charging yet.

 

[chevycc]

There is a post on reddit
2019.5.16 update charging every 56 minutes while idle : teslamotors

 

[03DSG]

Set it on a schedule...

This ^^^ Then it won’t even try to top up until the next schedule period. Charged to 50% last night at on schedule at 8:00pm. No activity since (circuit monitor) and sitting at 49%.

 

[Techniques]

Set it on a schedule...

For sure putting it on a schedule will help. I suspect that It could have been because Sentry was on, and was recording frequently.
Sentry seems to be using a fair bit of battery when active.

 

[pcons]

For sure putting it on a schedule will help. I suspect that It could have been because Sentry was on, and was recording frequently.
Sentry seems to be using a fair bit of battery when active.

Based off of some other posts it seems like sentry active basically is the same as never letting the car go to sleep, and has a power draw of around 250-300W. So in an 8 hour workday you would lose around 2-2.5 kWh or about 15 km of range. That's kind of crazy, but it is what it is.

 

[Techniques]

Based off of some other posts it seems like sentry active basically is the same as never letting the car go to sleep, and has a power draw of around 250-300W. So in an 8 hour workday you would lose around 2-2.5 kWh or about 15 km of range. That's kind of crazy, but it is what it is.

Yeah, it will be interesting to see how much it draws if say parked unplugged during a cold day with it turned on.

 

[duanra]

The good thing is the BMS will have less heating to do before charging hence we save power specially if the car is in a cold place.

 

[Prunesquallor]

I’m seeing this too. I do NOT have Sentry on, and I schedule charging to 90% from 9:00 pm to 6:00 am (free power for me). I’ll get one or two notices during the night that charging has started at 89%.

Edit: and temperatures have been quite mild in Houston, so not a battery warm-up function. The car is behaving like it will charge to maintain the pre-set charge level with a 1% deadband. Not a bad feature as long as it’s intentional and is not detrimental to the battery.