Is it density or speed? Or both?
I believe speed will become the dominant concern.
If you can go about 3 miles per kW on the freeway and you want to drive
for 4 hours without a major stop, what kind of ESVE do you need? Let's
say your average speed is 60mph.
60 * 4 = 240 miles
240 / 3 = 80kWh
Now, how long do you want to stop? Long enough to use the restroom,
stretch, maybe get a snack. 15 minutes, or .25 hours.
80 / .25 = 320kW
That's a pretty hefty ESVE. And, today, not many people have an 80kWh
battery. (Never mind that you can't charge to 100% at full speed.) But I
strongly think this is what the general public is going to demand.
Right now, putting in 50kW ESVEs along highways and freeways is a waste.
We should be looking at a minimum of 100kW. At least that would make
that 80kWh charge take about 50 minutes. Tolerable if you can fit in an
extended break.
In urban areas, where people might buy an EV without a place to charge
at home, some density will be needed. But along highways and freeways,
not too much. If you can drive 240 miles, you don't need an ESVE every
20 miles.
I realize some people will want to stop more often and do 10 minute
opportunity charges. As much as I respect that, I think that expecting
private enterprise to cater to that tiny segment of the overall
population, or spending large amounts of public funds to that end, is
not realistic.
Peri
------ Original Message ------
From: "Steves via EV" <[email protected]>
To: "Electric Vehicle Discussion List" <[email protected]>
Cc: "Steves" <[email protected]>
Sent: 01-May-18 3:12:15 AM
Subject: Re: [EVDL] Charging station density
Montreal has also been rapidly expanding its system - Circuit
électrique. Best part of it is, in places that it’s normally hard to
find parking, there is usually an EV charging space open and charging
cost is cheaper than the parking rate in most areas!
In the US the Tesla stations seen pretty widespread- too bad they
didn’t add at least one non-Tesla charger at each one. Would have been
a nice gesture.
-Steve
On May 1, 2018, at 2:57 AM, Cor van de Water via EV
<[email protected]> wrote:
For those of you living in rural USA or other hinterland
where there is no public charger within range of your EV,
don't be jealous of the coastal areas where you can actually
find a handful of chargers within reach - because I was shocked
(pun unintended) to see the density of charging locations in
for example The Netherlands, where it is impossible to be more
than a few miles away from several public chargers at all times.
Just one largish city like Amsterdam is home to 4,045 public
charging locations - totally amazing.
I was already suspecting a high density when I noticed that in
the sleepy suburb where some of my family resides, there were
several public charging locations put in next to parking stations
along strip malls and such, as well as noticing a regular office
building complex getting more and more plug in poles next to more and
more of the existing parking spaces, as well as seeing them being
used all the time...
Here a map of charging locations in The Netherlands, including a link
to locations elsewhere in Europe:
https://nederlandelektrisch.nl/opladen/waar-kan-ik-laden-in-nederland
Cor.
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