When it comes to the topic of energy transition, it is usually the big projects that get caught up in our heads: huge offshore wind farms on the high seas, solar farms several hectares in size in the desert or hundreds, even thousands, of kilometer-long transmission lines that bring environmentally friendly electricity to the urban centers. It is true: such mega-projects are necessary when conventional large-scale power plants are taken off the grid. However, an important part of the energy transition takes place at the lowest voltage level – the local grids.