E-cars don't need lots more power stations. Go though the eight pages of this thread to read my replies to all those who think the way you do and you'll see there is no problem.
For starters e-cars carry out almost all their charging at night and they all have charge timers. And they aren't greedy like i.c. cars, the equivalent cost of 200 mpg is easy, and even 400 mpg from some night electricity deals. Only today one energy company is offering the equivalent of 500 mpg compared with a 30 mpg i.c. car. That's because there's so much electricity available during the night it's embarrassing since power stations can't just be shut down in a instant so they need to get rid of the surplus.
And in future e-cars not being used will be supplying the grid at times of high demand, they already do in Denmark and the same is being planned for here. Nissan and one of the energy companies have just launched a government backed trial scheme.
And we only buy 2 million cars a year so replacing our 30 million I.C. ones would take 15 years even if all of us only buy e-cars. But we won't of course, for 15 years many will still buy i.c. ones while they can. So the demand for more current will be very gradual.
Charging stations will be providing a lot of their own solar power anyway. One fully open by the A9 in Scotland can charge 26 cars at a time and supplies 30% of the power needed from it's solar roofing. Here's a photo of it:
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