The (state-owned) power company owning the grid and much of the generation for the country has been pushing this change forward. The country has transitioned from almost pure hydro to wind and has an excess of this type of generation, especially at night when it would be the ideal charging time.

There's also initiatives to encourage permanent grid use by the cars since the batteries can provide capacitive load which locally counters the grid's natural inductive load which is beneficial if it can be leveraged.