> Seems like it’s common across all EVs for the range to be inflated by around 20%, at least for freeway driving.
Most people speed on the freeway. Extra speed reduces range significantly.
Most people speed on the freeway. Extra speed reduces range significantly.
The linked figure[0] and associated paper report that efficiency peaks for EVs at around 20mph and then the cost per mile increases roughly linearly, by about 25 watt-hours when the speed increases by 10mph.
Please excuse the archaic units.
[0] https://www.researchgate.net/figure/ehicle-energy-economy-at...
I just finished a long drive for summer vacation. Driving through Denmark (completely flat) at 130 km/h would absolutely wipe the battery, would be surprised if I managed even 350 km on a full charge. Driving over the mountains in Norway however, from 0m elevation to over 1000m and down again, at slower mountain roads (max 80 km/h), yielded almost 500 km on single charge.
I did not expect flat+high speed vs hill-climbing+low speed would be that dramatically different.
And it is true of petrol cars as well. In my old clunker going from 110 km/h to 120km/h is a 9% speed increase but nets about 15% extra fuel consumption.