That's the average energy price, and what typically pay if you have fixed pricing per kWh, but there is lot of variance hourly/seasonally. Sometimes in the night time the price of energy can be almost nothing (e.g. hydro power reverses overfilling), but of course you still have to pay for grid company + taxes. To take advantage of that, you need a "market price" plan with your energy company. E.g. I try to store the cheap night-time energy into water boiler + floor heating.

An electric car is very good match for cheap nigh-time energy, as you typically charge overnight.