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  4. Electric car efficiency.
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Electric car efficiency.

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Offline Bored chemist

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Re: Electric car efficiency.
« Reply #20 on: 09/06/2021 10:24:48 »
Quote from: alancalverd on 09/06/2021 08:34:40
spend over an hour charging  your car so you can drive to the next motorway charging station.
It will not take an hour to provide the energy for a 28 mile/ half an hour journey
"Current government policy is that the interval between core motorway service areas should be no more than 28 miles or 30 minutes travelling time, whichever is the lesser."
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Offline alancalverd

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Re: Electric car efficiency.
« Reply #21 on: 09/06/2021 22:18:11 »
Standard consumption figure is 300Wh/mile. Just over 30 MJ. So it takes 17 minutes at 30 kW to get enough charge to each the next charging station. :Let's do it at the most economical speed of 50 mph or thereabouts - say 30 minutes to get there, 15 minutes to recharge enough to get to the next one.....If every charging station delivers 30 kW your average speed over a long journey will be 33.3 mph.

Please don't get me wrong. In a perfect world I'd love to have an electric car. But not in the real world.

Quote
BTW, you do realise that all the arguments you have put forward for not going electric, are the same as you could have used a hundred years ago for why ICE vehicles couldn't be practical, don't you?
Electric vehicles cars were indeed on the road 100 years ago. The reasons I give explain why they have not superseded ICE vehicles to date, and why the infrastructure and environmental costs of rapid adoption of electric cars are unacceptable. 
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Offline Bored chemist

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Re: Electric car efficiency.
« Reply #22 on: 09/06/2021 23:12:19 »
Quote from: alancalverd on 09/06/2021 22:18:11
But not in the real world.
In the real world, you would start by charging the car overnight.
For most journeys, that would get you to your destination.

For longer journeys you would charge when you stopped for lunch.
If we accept the number you pulled out of the air of 30KW  as a charging rate  then an hour's lunch gives you about another 120 miles.

Why do you post such a silly figure as 33 MPH?
You must realise that electric cars exist, and that they go- on average- faster than that.
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