Real wall to wheels consumption for model 3 mpg(Wh/mi)

[djole]

My average wall to wheels mpg for model 3 is 109mpg (308wh/mi) this was measured for 5 thousand miles. It supposed to be 126mpg, would you explain to me why is the difference this big? The car is showing 231 wh/mi

What is your real efficiency (not the one that car shows)?

 

[derotam]

Wouldn't charger conversion losses account for the discrepancy...just asking.

 

[Need]

Wouldn't charger conversion losses account for the discrepancy...just asking.

Yeah. According to this article, it is around 85/86% efficiency. It matches OP's result. 126*0.86 = 108.

Measuring EV charging efficiency - Tesla Living