No idea, have a petrol, but I saw this movie online which shows the fuel part of the active info display.
That car has driven 3500 kilometers and a range of 7000 left, so I would say around 10.000 kilometers? Although the consumption depends on driving conditions.
But it's nice that you monitor the range on the display so you would not need to check it very often

It should als be available on the classic dashboard and will display how much you should add, a warning will be shown from a range of about 2000 kilometers according to the manual.