Yup.
Like this:
Park on monday, 13%
Start to charge it on Friday night from 13%:
I work for one week about one week each month. My logs show the same each week the car is parked for about a week at the time. (This time it was not a whole week, but it didnt drop a single percent either).
Using scan my tesla and teslalogger i see the 0.1 kWh, or about 0.1 - 0.15% (depending on the car) reduction from the nominal remaining each day.
0.1kWh/day = 4 Watts! Not much.
In cold weather the displayed SOC is adjusted down from the real/measured SOC (most certain to compensate for cold losses etc.) and this only happens “first night” so when the SOC drops for example 3-4% the forst night due to a cold batt, this will not continue other nights.
The cold battery drop is displayed in the app with a blue part of the charging slider:
There can also be a drop just efter parking when the BMS gets the opportunity to measure the real SOC (as SOC during a drive is estimated). If the BMS does an overestimate the SOC will drop when BMS reads the true SOC after the drive.
It can be hard to distinguish these from each other. But as a rule of thumb:
-The BMS adjustments after the drive will happen (most of the adjustment, at least) within 30 minutes after the drive (I have logged data covering this).
- The display of the cold battery will take 3-12 hours or so, depending on ambient temps and the cell temp when parking.
- Sentry use ~ 250W (a bit depending on hardware, I have seen 220W (model 3 intel atom) to 290W (model S AMD Ryzen).
- this is roughly 6kWh / day so between 6-10% depending on car and hardware.
- The car use the same power awake, so sebtry off but not sleeping - same loss/ day.
If you see 6-10% / day loss, the car does not sleep. Either sentry is on or it just aint tired. Reboot the complete car might help in that case.