[schiffern]

> Personally, I think it's when an EV can make a 9-hour drive without needing more than about 30 minutes of total charging.

The Model S 100D can almost do that already: start in your garage with a 100% charge, drive 300 miles, recharge 80% in 40 minutes, drive another 240 miles. Under ideal conditions it can even achieve it (the EPA range being 335 miles).

Current Superchargers can put out 145 kW, but the cars can only accept 120 kW. So the network already has some future-proofing for when the chemistry catches up.

Of course the old goalpost used to be 300 miles without charging. I have no doubt it will move yet again, and "24 hours of driving with only 5 minutes of charging" will become the new benchmark for practicality. :p