Energy storage with a capacity of 60-200 kWh is the most common. There are also larger energy storages. The xcharge charger has 2x233kWh energy storage.
The average value of charging the car battery while stationary is 30kWh. The station can provide from 2 to several charging sessions using an energy storage solution. The energy storage station generates savings for the owner in the form of a lower connection maintenance fee (50kW vs. 300kW)
It is projected that by 2030 there will be around 5 million DC fast chargers worldwide. They will be able to function only on the basis of stored energy.