Your graph shows other wise.. at 30mph, aero drag is about 30Wh/mile. Total wh/mile is 150
There is no single cutoff point at which "X" becomes irrelevant; any chosen point is going to be arbitrary. I chose 30mph / 50kph as the point at where aero starts to become irrelevant because it gets down to 15-20% of total consumption there. Also, at those speeds to also tend to encounter a lot more braking losses, making the problem even worse, while at higher speeds you tend to encounter little to no braking. So I think 30mph / 50kph is a quite reasonable point to declare aero as not being significant.
Of course, having such a "cutoff point" is not relevant to the calculation of aero's impact on your total average power consumption.
At 60mph, aero is about 110 wh/mile
There are four dashes between each 50kWh line. It's at the top of the first dash. Which means about 120Wh/mi. Versus 250Wh/mi total. So about 50% of total energy consumption. Which is the number I used in the above calculation.
So, do you believe wheel covers reduce aero drag by 20%?
It was explicitly stated at a 10% aero reduction. 10% aero reduction * 50% of the energy being for aero losses = 5% total energy reduction. Hence, to repeat:
* Your power bill will be 5% lower
* Your range will be 5% longer
* Your vehicle will undergo 5% fewer cycles
* You'll get 5% more distance per minute charging
* Your typical daily cycle depth will be 5% less, which will have about a 15% or so improvement on number of cycles the battery can endure.
If you don't find that meaningful, then that's fine. Others do.
