From a comment on the web:
The average power line in a residential neighborhood is capable of transmitting around 500 simultaneous amps before the pole transformers start blowing. That is why you start getting brownouts when everyone uses air conditioning in the summer. As the lines heat up, they get less efficient.
Most American homes have a 100amp service, even though a lot of new construction doubles this. The normal draw of a house is around 20-30 amps, unless you are running a high draw appliance. Then you might hit 40-60.
We barely have enough generation capacity to run everything now. In states like California, they don't have enough and have to siphon energy from other states. Where is the energy going to come from to charge all the electric cars? Nearly all of them will be plugged in at the same time.
It doesn't matter how far the technology goes, the power need is there. The faster the charge, the higher the amperage needed. Current fast charging systems use just over 70 amps. Requiring most homes to install a second 100 amp service. But that is only good for one car. To charge two cars and have enough power for your house, you'll need at least a 300 amp service. You start to notice a problem if you and your neighbor both have a 300 amp service and charge two cars at night. That pole transformer down the street will blow in a few seconds.
The function of that transformer is to step down the voltage from a few thousand volts to the 240v your residence runs on. There are larger transformers that handle more amps, but they are in the local substation. To handle a neighborhood of electric cars, you'll need a substation for every block and a pole transformer outside every house.
It just isn't feasible. The infrastructure needed for 200 million electric cars in the USA will cost trillions. It won't happen. The electric dream of blogs like Electrek and their brainless commenters is really a nightmare for everyone.
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