We should be mandating these requirements now for EVs:

1. Allow smart charging and discharging to the grid, to lower the overall peaks of energy demand (these peak periods are what drive power prices/shortags).

2. Direct user road charging, based on time of day, location, miles travelled, and vehicle class.

Its particularly dumb to add more energy demand to peak hours - ie. by allowing cars to just charge as soon as they've plugged in once the driver gets home (which is typically peak demand, right at the same time as solar generation fading).