Re: No Need to Panic
Overnight is exactly how plugging something into a socket can work today. Most EV/plug in hybrids can be set to only charge at set times *and* in some cases that can be combined with GPS location - so, for example, you can make sure the vehicle only charges overnight when at home, but can charge any time it's plugged in when away from home.
My washing machine and dishwasher have timers, I set them to run overnight on cheap electricity so they finish about the time I get up.
You could even offer people especially cheap power at staggered times to encourage them to set stuff up properly, rather than your solution of overcharging them to behave.
Some problems are not impossible to solve, including the one that figuring out that the 350kW charging system in the article is not likely to be a domestic system - in the same way that the Tesla 120kW chargers aren't.