You don't necessarily need more generation facilities if you charge at night. Just don't charge at peak power and no further generators should be required.
Let's say your average electric car is driven 30 miles a day, and we'll say, just to be ridiculous, at 60mph. That should take an average of 20 hp or so, or less if the car is efficient. That translates to around 13 kilowatt hours. And it assumes that electric cars won't be more efficient, which is probably too pessimistic. That's probably less than most houses use in a day (about the same as mine), so if you make it off peak when the office buildings are not using their AC either, it shouldn't get over current peaks. More fuel usage, yes. Private aircraft would only be a tiny fraction of this.
Pointing out the drawbacks of current batteries is pretty silly. This won't happen without better ones, and certainly not without a lot of effort to make them safer. And how often do you hear of laptop or cell phone batteries bursting into flame lately? The battery management can be built into the vehicle. As far as I know, charging lithium batteries doesn't give off hydrogen the way charging lead acid ones does. And if it did, maybe you could put the hydrogen into a tiny fuel cell and kick the power back into the batteries.
Electric vehicles, with no modifications, will be able to use whatever alternate source of electric power comes down the pike, which is likely to mean just about any source of alternative energy. Which is better than fuel burning vehicles can say.
