Oh, I know it is being worked on and the technology does exist, but how many people in the City have their own off-road parking space to accommodate an EV parking space? How many people who live in terraced housing have their own off-road parking space? How many people who live in flats... well, I guess you might get the point by now. And then, of those people who do have off-road parking, how many are daft enough to buy an electric car? "hey, Fellahs! I have this great idea to save the Planet". Not.We're working on stuff like that already.
HCALCS (HAN connected auxiliary load control switch) exist to switch devices such as EV chargers automatically.
There's already live data on the energy mix (e.g. renewable levels) of the grid; e.g. National Grid: Live Status
Weather reporting data API services are widely available.
A huge percentage of the population already use some form a electronic diary / calendar.
All of the basic building blocks already exist. Nothing fantasy about it.