The indicators that always come up when comparing EV electricity costs are “km/kWh” and “Wh/km”, but the it is not possible to compare unless you standardize on one because the indicators differ depending on the manufacturer. disadvantage is that
However, even after searching for conversion methods, I couldn’t find anything clear, so I decided to leave a guide for myself.
We are referring to the numbers from people who have actually driven and verified the results.
Convert km/kWh to Wh/km → Just divide electricity cost by 1000
The number ○○km/kWh will be written on the meter.
at ○○) by 1000 the electricity cost ( Just divide .
As you can see, 1000÷7.1 is 140.8. This also matches EVSmart’s record above.
The result of flying at high speed with the bz4x I rented was 4.5km/kWh, which is 222.2Wh/km.
Convert Wh/km to km/kWh → Just divide electricity cost by 1000
Conversely, let’s convert Wh/km to km/kWh.
The number ○○Wh/km will be written on the meter.
Just divide the electricity cost (where ○○) by 1000 .
As you can see, the numbers matched.
You must have thought, “Why don’t we divide by 1000 again?”
That’s what I thought most. This is because I arrived at the result after doing a long calculation in the following part…
If I had some free time, I would create a text box using programming that would calculate electricity costs just by typing in a number…
<Rejected: A memo that I diligently wrote for this article>
This calculation formula was abandoned because a better method was found later.
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Assume that the electricity cost of Model Y is 7.1km/kWh.
Since you can run 7.1km with 1kWh, you can run 1km with 0.140kWh.
Next, convert kWh to Wh. Just multiply this by 1000.
In other words, it is 140Wh/km.
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Assume that the electricity consumption of Model Y is 140Wh/km.
This means that it takes 140Wh to run 1km.
Conversely, I would like to find out how many kilometers I can travel with 1Wh.
To do this, we need to divide 1 by 140, so 1÷140=0.00714…
Let me write it a little more clearly.
140Wh : 1km
1Wh : (1 ÷ 140 )km
1Wh : 0.00714km
I want to find out how many kilometers I can travel with 1kWh = 1000Wh, so to do this I just need to multiply both sides by 1000.
1000Wh : 7.14km
1000Wh is 1kWh, so
1kWh : 7.14km
In other words, it is 7.1km/kWh. The calculation results matched.
