SolTech Supreme are effective thin film solar cells! They have higher efficiency than other solutions in diffuse sunlight. They are less affected by temperature increases, which also contribute to a good effect. With the Supreme thin film solar cells it is possible not only to use the 1,500 hours of sunlight in Sweden, even during most of the 2,500 hours a year when it is cloudy and the sunlight is therefore more diffuse. This does not cope with traditional silicon cells. No wonder that most of the world’s largest solar power plants today use the same type of thin-film solar cells.