CT loses electric miles overnight (vampire drain)

[Mastoridis]

Does this happen to you?
I was 181 miles at 10:30pm and the next day at 8:30am my CT showed 172. Sentry mode is turned off when I am at home. I lost 9 miles overnight. Is this normal?

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[dalton108]

Yes. This is normal behavior on all electric cars, not just the Cybertruck. It’s wintertime, so you’re seeing thermal management. A big hint is that snowflake!

I don’t mean to be rude to you, but this is a very basic question that you should’ve known/understood before you ever even considered purchasing an electric car.

If you don’t know this, I’m fearful for what other things you don’t know. You need to give yourself a crash course on the basics. There are many sources for that the manual, YouTube, simple Google search, Chat.

 

[mongo]

Does this happen to you?
I was 181 miles at 10:30pm and the next day at 8:30am my CT showed 172. Sentry mode is turned off when I am at home. I lost 9 miles overnight. Is this normal?

The pack is cold and is really at 60%
Blue bars is energy not currently available due to cell temperature.

2% = around 7 miles
9 miles = around 3% additional cold loss

 

[voxel]

Yes. This is normal behavior on all electric cars, not just the Cybertruck. It’s wintertime, so you’re seeing thermal management. A big hint is that snowflake!

No it's how li-ion cells work. There's actually different kWh capacities for warm and cold temps.

The pack is cold and is really at 60%
Blue bars is energy not currently available due to cell temperature.

2% = around 7 miles
9 miles = around 3% additional cold loss

This.

 

[mark555055c]

Does this happen to you?
I was 181 miles at 10:30pm and the next day at 8:30am my CT showed 172. Sentry mode is turned off when I am at home. I lost 9 miles overnight. Is this normal?

Yes, completely normal, especially in the cold.

 

[MyOtherTruck]

Could just be adjusting to the temp. Observe %, instead of miles.

 

[dalton108]

No it's how li-ion cells work. There's actually different kWh capacities for warm and cold temps.



This.

No it's how li-ion cells work. There's actually different kWh capacities for warm and cold temps.



This.

I guess I used the wrong nomenclature. Beyond the physics, isn’t the car also managing this situation which is what I meant?

The snowflake is letting you know what’s going on and isn’t that an indication that the capacity has been reduced? Then the car reduces regen etc. until the battery is warm enough?

 

[REM]

Most people never RTFM lol:

https://www.tesla.com/ownersmanual/...er tires to increase traction in snowy or icy

 

[Crissa]

I guess I used the wrong nomenclature. Beyond the physics, isn’t the car also managing this situation which is what I meant?

The snowflake is letting you know what’s going on and isn’t that an indication that the capacity has been reduced? Then the car reduces regen etc. until the battery is warm enough?

Yes, the entire vehicle would also expend more energy preconditioning. I don't know if it would expend much overnight, specifically. But the snowflake represents how less efficient the battery is at giving you electrons since the chemical reactions it depends upon are less efficient in the cold.

If the outside temperature warmed up the pack, you'd see that blue part 'magically' return without having to charge the battery.

-Crissa

 

[AlmostHuman]

Wanted to post some data from our 2020 Model X for reference on the statement “Give Tesla time, they will get the software fine tuned.”

Our X does amazing with vampire drain. Keeping in mind we make sure our key fobs are away from the vehicle so they do not keep it awake. No Sentry Mode active. Often see it “asleep” for 4 plus days.

 

[ABILISK]

Sorry, I forgot your question when I noticed you prioritize “fart” enough to move it to your top row. Proud of you ? ? ?

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