TeslaFi vs. native efficiency reporting differences

[voxel]

I've noticed TeslaFi reports different average energy stats compared to the in-car Wh/mile stats. Sometimes as great as 20 Wh/mile and this happens on both my Model 3RWD and Model YLR. TeslaFi appears to report on the low-end. Which stat is "correct"? The in-car one?

Here's a quick trip today:

First the car gave me 252 Wh/mile

Then a dozen seconds later I saw it report an even lower number - without the car moving (I was parked with AC):

 

[KenC]

Obviously Teslafi is using the 8.93 miles and 2.12kWh to get its efficiency number. Tesla, is less granular, and does a lot of rounding, less precision, which causes the difference.

 

[GtiMart]

There is a setting in TeslaFi to adjust the calculation:

For me, 1.038 seemed to give good results but YMMV, which is why it's a setting.

Also note that there are situations where TeslaFi might be trying to let the car sleep as you start your drive. Because of that, TeslaFi sometimes misses a couple minutes at the start of a drive. This might affect your result for that particular drive.

OH: about your second screen capture and an even worse number for the drive: The car only counts energy spent in drive, not parked, so I *think* you were stopped but not in Park for this to happen...
EDIT 2: Oh, not, the number would have become worse, not better. I have no idea what happened. But my Drive/stopped vs Parked comment still applies.

 

[voxel]

There is a setting in TeslaFi to adjust the calculation:
View attachment 789981
For me, 1.038 seemed to give good results but YMMV, which is why it's a setting.

Also note that there are situations where TeslaFi might be trying to let the car sleep as you start your drive. Because of that, TeslaFi sometimes misses a couple minutes at the start of a drive. This might affect your result for that particular drive.

OH: about your second screen capture and an even worse number for the drive: The car only counts energy spent in drive, not parked, so I *think* you were stopped but not in Park for this to happen...
EDIT 2: Oh, not, the number would have become worse, not better. I have no idea what happened. But my Drive/stopped vs Parked comment still applies.

No.. I'm 100% sure I was in park. I stopped at a busy red light (waited 3+ minutes for the light to change) and put it in park to explicitly STOP the trip on TeslaFi (it recorded the end of the first trip there).

 

[GtiMart]

Ok, then I really don't understand why the car readjusted its consumption value to something better.