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Anonymous Poster #1

Charging stations

09/21/2022 3:44 PM

Hello,

How many electrical vehicule charging stations of 22 KW each can be fed by one distribution board please? Is there a limitation on the power of the distribution board?

Thank you

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#1

Re: charging stations

09/21/2022 6:05 PM

..." L1 is the slowest type of charging equipment. L1 chargers plug directly into a standard 120 volt (V) AC outlet supplying an average power output of 1.3 kW to 2.4 kW. "...

..."L2 chargers operate at 208-240 V and output anywhere from 3 kW to 19 kW of AC power. "...

https://freewiretech.com/difference-between-ev-charging-levels/

The number of chargers is going to depend on the circuit available...40,50 or 60 amps depending on what's available, and how fast you need to charge...amps times volts equals watts....so if you have a 60 amp circuit at 240 volts you've got around 14kw to play with...Overall, electric cars consume between 0.24 kWh and 0.87 kWh per mile....depending on car type and driving conditions and style...So figure out how many miles you're going to drive each day, and how much time you have to charge the vehicle , then size the circuit accordingly, with some excess....

https://ecocostsavings.com/electric-car-kwh-per-mile-list/

The number of chargers per distribution board is predetermined ....choose your board according to how many charging ports you want and at what power levels...

https://search.abb.com/library/Download.aspx?DocumentID=2CGC0108&LanguageCode=en&DocumentPartId=&Action=Launch

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#2

Re: charging stations

09/21/2022 9:17 PM

Several hundred, probably.

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#3

Re: charging stations

09/22/2022 2:51 AM

A1) It depends upon the size of the <...distribution board...> and the diversity, both of which have been withheld from the forum.

A2) It is limited by the capacity of the upstream circuit protective device(s) and its feeder cable(s) , which has/have been withheld from the forum.

Protocols for sizing and selection can be found in the appropriate national electrical code; in the UK, for example, BS7671 applies.

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#4

Re: Charging stations

09/22/2022 5:04 AM

Really that depends on the size of the Transformer connected to the distribution board not the distribution board, a 1MW transformer can drive 45x 22KW charging stations. The distribution board needs to be able to supply 45 charging stations of 22KW through 53 amp supplies at 415 volts.

If allowance is made for 95% efficiency then the number becomes 42 at 90% it is 40. It is just a pure case of mathematics.

Of course there needs to be a spare 1MW of capacity in the supply system.

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#5

Re: Charging stations

09/22/2022 8:30 AM

For you, no charging stations can be installed. You don't tell us anything about the distribution board or anything about the upstream grid powering this board. You don't even give us a generic location (residence, industrial park, parking garage, a farm, etc.) where we can make some moderately informed guesses about the grid and other critical missing information.

Do your own homework.

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#6

Re: Charging stations

09/22/2022 9:06 AM

...or even the country of installation. It matters.

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#7

Re: Charging stations

09/22/2022 10:30 AM

You can purchase a distribution board rated as high as 3000 amperes without requiring custom construction. So at an imagined 230 volts 3 phase, you could power 54 stations at once. With diversity factor, you could install 75 stations and be reasonably sure of servicing all stations adequately.

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#8

Re: Charging stations

09/22/2022 12:18 PM

That will have to be phased in, unlike the leadership we have now, that wants an immediate transition.

as far as being phased in, I was in I believe near Amarillo (Texas) botanical garden, there were businesses in that area, that had installed a dual purpose solar panels, one purpose was for shade for their employees, that other was to generated electricity.

this could be used to assist in charging EV’s to take the strain off the existing power grid. And that is and issue throughout the U.S.

unfortunately, who is going to pay for all that free energy production infrastructure…

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#9
In reply to #8

Re: Charging stations

09/23/2022 2:55 PM

Yet another towing range test for the Ford Lightning....really bad, range cut by nearly 2/3...

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