The company Solarr had contacted me by phone within a day. Unfortunately, I did not pick up the first time, because I did not know the number. At the second attempt, however, it worked and I had the opportunity to speak with a consultant. Based on my consumption data, he recommended a system, which was then modeled in 3D planning. Finally, there was an inspection appointment, where the conditions were both checked and measured. The rest went smoothly and was really just waiting for the implementation, which happened less than three months later.