Last year, the amount of newly installed glazed collector area added up to 2.7 million m² (1.9 GWth) in the European Union’s E28 and Switzerland combined. It is another decline compared to the previous year, this time by 7 %.Last year, the amount of newly installed glazed collector area added up to 2.7 million m² (1.9 GWth) in the European Union’s E28 and Switzerland combined. It is another decline compared to the previous year, this time by 7 %.