Missing miles/kWh in display

[Rex]

In order to investigate why my charge efficiency in my new Mach E exceeds 100%, I did an experiment.
I get more charge into the battery according to the % added to the battery in FP if I assume the specified battery capacity than comes out of the wall box.
My previous Mach E was almost always less than 100%, roughly 95% which is what I would guess at.

Given Ford haven't invented a perpetual motion machine I wanted to investigate further.
I realised that the integral over a reasonable journey of miles/kWh would provide a Charlier's Check of battery percentage vs kWh.
So I made a video of the miles/kWh display in the car on a journey and integrated the readings.

I got an interesting result which I shall check on further journeys.

However it was very apparent some readings don't occur.

The initial readings were from the start and it fairly rapidly approached the 3 area but would flick back and forth between 2.8 and 3.0, 3.1 and 3.3.
The car display spent a long time flicking back and forth between 3.1 and 3.3.
So does the arithmetic in the car not support 2.9 and 3.2 miles/kWhr and possibly other numbers?

Measuring miles is pretty easy and so is kWh so there should not be a digitisation error.

Anyone noticed anything similar?


Is this just my car or others experiencing missing numbers?

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[RickMachE]

I have observed the same - 2.9 specifically. I never get 3.X on any trip, and I don't look during local driving.

 

[Mach-Lee]

I don't think you can integrate a running average to get the desired result. At the end of your trip, just take the miles driven divided by the average trip efficiency to get the kWh used for the trip. There will be discrepancy if the battery pack temperature changes significantly during the trip, since that changes the estimate of kWh remaining.

Not sure what's going on, but the charging efficiency works out on my end. For example, my EVSE says I charged 47 kWh, FordPass reports 44 kWh, so my charging efficiency is about 93%.

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