Battery Drain

[Bootneckshuffl]

Hi all

I know this is always a hot topic but hear me out

Since the V11 update, I’ve noticed huge differences in my power consumption

Here’s an example, car preconditioned this morning. Started with 91% battery. Done the school run, came back, went straight out to shops, car sat with sentry on for 1.5 hours and returned home. In total, 13 miles completed and 20% battery used

Surely this can’t be right?

 

[Envchem]

First of all is your car SR, LR or performance? US or China made? 20% can be quite different for depending on total battery capacity.
What was the average consumption during this run?

 

[init6]

Uphill? Downhill? Outside Temp? Lots of sentry alerts or none? Snowflake icon showing at any time?
Have a read at the other battery drain threads and follow the recommendations there for identifying if the loss is normal or not.

 

[Bootneckshuffl]

First of all is your car SR, LR or performance? US or China made? 20% can be quite different for depending on total battery capacity.
What was the average consumption during this run?

Apologies

2020 M3P American made

 

[Bootneckshuffl]

Uphill? Downhill? Outside Temp? Lots of sentry alerts or none? Snowflake icon showing at any time?
Have a read at the other battery drain threads and follow the recommendations there for identifying if the loss is normal or not.

Pretty flat run, no major inclines or declines
4-8 degrees outside temp
no sentry alerts
no snowflake icon
car preconditioned prior to departure

 

[kelvin 660]

car preconditioned prior to departure

But was the car on shore power or was it on battery power?

 

[Bootneckshuffl]

But was the car on shore power or was it on battery power?

Battery, only used 2%

Ive downloaded Teslafi now to see if I can see anything out of the ordinary

 

[Bootneckshuffl]

Just reading there, that setting Scheduled Departure in the app, can cause battery drain throughout the day!

Anyone else heard this?

 

[init6]

Where did you read that?

 

[kelvin 660]

TeslaFi is you best friend when finding out where your battery is being used...

 

[Stranger Dings]

Using 15 KWh for 13 miles is certainly possible at this time of year. Preconditioning from the battery and not the mains must chew a few KWh on its own. Couple that with the super inefficiency that you get for short journeys at this time of year and the figures you have don’t surprise me. Don’t get me wrong, it is high energy usage, but losing 20% over several short journeys in the cold wouldn’t surprise me (I’ve also got a 2020 M3P).

 

[Bootneckshuffl]

TeslaFi is you best friend when finding out where your battery is being used...

Defo, just had a look there. Mostly sleeping through the night but did wake once or twice for around 15 mins through the night, not sure why

 

[Bootneckshuffl]

Using 15 KWh for 13 miles is certainly possible at this time of year. Preconditioning from the battery and not the mains must chew a few KWh on its own. Couple that with the super inefficiency that you get for short journeys at this time of year and the figures you have don’t surprise me. Don’t get me wrong, it is high energy usage, but losing 20% over several short journeys in the cold wouldn’t surprise me (I’ve also got a 2020 M3P).

Thanks man, puts my mind at rest a bit

 

[init6]

Defo, just had a look there. Mostly sleeping through the night but did wake once or twice for around 15 mins through the night, not sure why

You need to read the previous posts. The car does that and it's often commented on.

 

[ElijahEVMan]

I had my M3 LR on charge last night and this morning I checked the app 10 minutes before my planned departure and the SoC was at the expected 81%. I then used the app to put the car into defrost mode. 10 minutes later the SoC was at 78%.

I thought it would be using shore power for the pre-heating but even so, 3% in 10 minutes seems excessive. Don't think I have noticed this before since owning for 16 months now. Outside temperature was -2.

Should the car be using shore power for preheating / preconditioning?