ALDO:
I do not have a full electric car. We have two plug-in hybrids with stupid range of 40 km.
As far as I have heard it is useful to charge from 10 or 20% up to 60-80% if you are charging during a longer trip. Therefore it is important to predict how much km or miles you get for a 10 or 20 minutes charge.
The same happens to me with my gasoline cars. I can deduct german VAT and driving in CH or AT sometime I fill only gas so I can reach either Germany or my house. In that case I have also to calculate how I will drive and how far I have to drive and then calculate the litres.
Of course it is. But range on a EV is the same as range on a normal car. It varies depending on driving style.
For my driving style in my Taycan, a full charge goes ~420km. Instantly I know I will do ~40km per 10%. But for someone that only uses the EPA rated range as a guideline, their 10% charge only goes 35km. Others might have a lighter foot than me and can get 450km on a full charge, so their 10% means 45km.
How do we know which driving style those published range charged per minute graphs are based on? A 10% charge time using EPA data will only net you 35km, while for that light footed crowd it will be 45km, that's a variation of 10km right there. For a 20-80% charge session, the difference will be 60km, which means the light footed one could have finish his charging much earlier. That 60km difference is the same as the difference between my e-Tron and my Taycan on a full charge.
A gas pump at Shell or whatever doesn't shows miles per litre pumped. Why? Cause every car has a different fuel economy rating, hence even for the same car there will be variations between drivers. You might like to cruise on the highway in 7th gear, maybe I would prefer to keep it in 5th, instantly my range will be less than yours, even in the same car.
Leawood here had been driving his Model 3 for years, he has intimate knowledge on how far he car can go on a full charge. When charging, he does't need a graph to check how many miles per minute his car is charging at. He knows instantly how many miles per 10% charged his car is getting.
A miles per minute charged graph is only useful if they also show how the car is being driven, how much regen the driver is using and how much throttle are applied, and how many of the electric accessories the car has engaged, and the total current draw by the car in their calculation for miles per minute charged.
kW per minute charged or % per minute charge is much more useful, people instantly knows how full their 'tank' is, and how much electricity is being pumped into the car. For a car charging at say 180kW per hour, that's 3kW per minute.
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I think he is just trying to make people wait for his stuff, but he knows he cant deliver and that is really annoying IMO
