What do you mean by discharge and charging rates, and where are those numbers from? I always thought that 219 Wh/mi was the EPA rating for driving the car.
What he means by that is that there are two measures for calculation. The EPA rating is the same for both, but the total capacity is different for charging and discharging due to a buffer being calculated in full when charging and being hidden below 0% when driving.
I have explained this in my post and video.
Battery Degradation and Rated Range explained
When you charge the car to full, or whatever the BMS thinks is full, the car calculates the range on screen like so.
kWh full capacity /EPA constant in kWh
This is the formula used.
However, when you start discharging the car(driving, idling, etc.) the car pushes a buffer of roughly 3.5kWh below the 0%/0miles mark.
So the discharge formula is now
Full capacity - buffer / EPA constant in kWh
So in effect what this does is, you end up having only 95-96% of the rated range, from 0-100%.
So in effect if you wish to drive the rated range you have to go below the EPA rated consumption (straight line in your Energy consumption graph)
So if you take his values,219 and 209, the difference is almost exactly 95.5-96% of the EPA rated range, which is the size of the buffer which miraculously goes below the 0 mile once you unplug the car.
I explained this in my video post I linked, make sure to watch it to understand where the data comes from.
And since the WLTP rating never changed and it is highly, highly, very highly unlikely that Tesla just decided to add a kWh or two extra and change the production line, they just decided to adjust the EPA rating displayed to you. It is just marketing as someone mentioned, the battery size/gas tank is the same. Which means that if you drive at the EPA rated consumption you will still get only 225-230 miles out of 0-100%
