Phantom Drain Question

[Dan123]

So my car was parked outside for a week. Outside temperature was about 70-85 degrees (mostly sunny). during that time, the range decreased from 102 miles to 61 miles. Is that normal phantom drain, or does it mean that the car was actively trying to condition the battery?

It also appears that the display that shows kWh since last charge does not take into account phantom drain. So the kWh usage displayed in the car is kind of misleading, as it only takes into account kWh while driving, and does not take into account significant energy lost while parked.

 

[ChrisH]

So my car was parked outside for a week. Outside temperature was about 70-85 degrees (mostly sunny). during that time, the range decreased from 102 miles to 61 miles. Is that normal phantom drain, or does it mean that the car was actively trying to condition the battery?

It also appears that the display that shows kWh since last charge does not take into account phantom drain. So the kWh usage displayed in the car is kind of misleading, as it only takes into account kWh while driving, and does not take into account significant energy lost while parked.

That seems a little high for range loss. I parked mine for 6 days and lost 24 miles. Mine was in a garage at about 45-55 degrees.

I will add that mine started at 248 and dropped to 224 so not sure if that makes a difference.

 

[derotam]

Did you have overheat protection on? 41 miles of loss is 13% which is ~1.8% per day over 7 days which is a bit high on average but definitely could easily be explained by overheat protection. those outside temps could definitely push the cabin temp above 105F

 

[derotam]

Also, if it was cabin overheat protection(page 101 of manual), you may have lost more than 41 miles if you had had a higher starting charge level because it disables once the battery gets to 20%.

 

[Dan123]

Did you have overheat protection on? 41 miles of loss is 13% which is ~1.8% per day over 7 days which is a bit high on average but definitely could easily be explained by overheat protection. those outside temps could definitely push the cabin temp above 105F

I think it was off. I will check.

 

[TexasEV]

As is always asked in every thread on vampire drain, do you have any third party crap communicating with your car? If so, it likely prevented the car from getting as much sleep as it otherwise would.

 

[Dan123]

As is always asked in every thread on vampire drain, do you have any third party crap communicating with your car? If so, it likely prevented the car from getting as much sleep as it otherwise would.

No I changed the password on purpose to prevent any third party apps from accessing the car. Only the official Tesla app.

 

[TexasEV]

No I changed the password on purpose to prevent any third party apps from accessing the car. Only the official Tesla app.

Did you open the Tesla app to "check on" the car while you were gone? That will also wake the car up or delay when it goes to sleep.