You can hardly drive into an industrial area or residential area without seeing a roof or lawn with solar panels. More and more people and companies are choosing to install solar panels to meet their own energy needs. The challenge here is only becoming increasingly clear: our electricity grid is not able to process the large amount of energy that is generated locally. We are almost used to using our electrical grid connection as a battery. We produce an excess of energy during the day and at night we use what we had left and fed back to the grid. In some cases it already happens that a maximum is set for the energy to be returned to the grid, so that valuable energy is lost because it cannot be used. And what do you do with the space you have left for solar panels, if you cannot use or store the energy yourself?