“At minimum the charging station should be installed on a dedicated 40-amp circuit, but if you want to future-proof your wiring, 50 or 60 amps is better.” from Green Car.
This will be a huge deterrent (or should be) for most. In many homes this will require a service upgrade or the addition of a sub-panel. It is my understanding many new homes are being installed with 400 amp service. When I built in the early 90s 200 amp service 40 slot panels were very typical. 40 slots fill up fast and homes older than 40 years were built with less.
There will be money to be made in the electrical trade.
Most of the homes older than 30 years out here in the West only have 100amp service. The utility will charge you an arm and a left one to upgrade the transformer. Here in Nevada they may even charge you a portion of the cost of upgrading the grid back to and including the power plant - that is rare but they have tried.
Heck, here in the Northeast one hundred year old plus houses still have 60 and 100 amp service with knob and tube, push button switches, fuses, and ungrounded.
Don’t you also need a similar upgrade to switch to solar?
At the electric rate I pay if I charge my car at 60 amps for 6 hours that’s about $50. That gets me maybe 300 miles. I can drive 600 miles in my present car for about $40 in diesel fuel. Two and a half times more for me to fuel and electric car.