Flevonice is the location where the batteries were placed. The batteries are charged when there is a surplus of renewable energy. The batteries are then discharged when there is a demand for power that is not sufficiently available in the grid. For example, when the sun is shining, this energy is stored in the batteries to be used in later moment when the sun is not shining. In this way, the batteries help to balance the grid and solve congestion problems. And that is essential for a sustainable and reliable energy supply in The Netherlands.