why Wh/mi and not mi/Wh?

[Teefal]

Always wondered this ... isn't mi/Wh easier for people to understand (like mpg?)

is it just to avoid fractions? 0.033, etc. Could do 1000mi/Wh, I guess.

Anyway ... need to flip your thinking ... 300 is worse than 280.

Could be so the consumption graph looks like the mountains you're climbing

 

[laceyboy]

I would think mi/Wh indicates range which we already have for whole battery pack.
Wh/mi is better for energy consumption.

 

[acarney]

Always wondered this ... isn't mi/Wh easier for people to understand (like mpg?)

 

[kishkaru]

mi/kWh = efficiency. Higher = better.
kWh/mi (or Wh/mi) = consumption. Lower = better.

I think Tesla was one of the first companies that used consumption reporting over efficiecny reporting, and now several other automakers are switching to it too.

I personally like using mi/kWh. I call it MPK (similar to MPG). I can ask other EV drivers "hey, what kind of MPK are you getting in your car?"
3 mi/kWh (or 333 Wh/mi) is my baseline at highway speeds. I have SoC % rather than range, as it makes it easy to guesstimate range on a trip (since rated range is not equal to real range). The math is easy to do in your head while driving.

So say I have 50% battery remaining, this means that I can drive (75 kWh * 50%) * 3 = 112 mi more.
To do the same calculation using consumption, the math is more difficult: (75 kWh * 50%) / 0.333 = 112 mi.

> Could be so the consumption graph looks like the mountains you're climbing
That's the real secret reason Tesla picked it, haha.

 

[Hexo09]

That's a good question. I grew up in Europe (France) and the measure for ICE cars there is the number of liters consumed/100km. So it is closer to what Tesla uses, but it does force you to do some math gymnastics in your head to calculate your range. But I like numbers, so I don't mind.

 

[frankvb]

That's a good question. I grew up in Europe (France) and the measure for ICE cars there is the number of liters consumed/100km. So it is closer to what Tesla uses, but it does force you to do some math gymnastics in your head to calculate your range. But I like numbers, so I don't mind.

But it used to be km/l quite a long time ago (at least in the Netherlands). Can't remember exactly when the switch happened, could actually have been over a long transition period.

 

[SSonnentag]

Miles per Wh would be a very tiny number.
On the order of 0.0033 miles per Wh.

 

[dyau]

would you rather multiply by miles to easily get what the total kwh is for your trip?

or would you rather multiply by kwh to get the total miles for your trip?


i think the first is more useful..