Module efficiencies and performance measurements: Summary of a 10 years measuring program

Since 1994 a photovoltaic test field has been operated at Forschungszentrum Rossendorf near Dresden. It consists of about 15 modules (mono- and polycrystalline Si, a-Si:H and CIS) from different suppliers, which were mounted in a plane with an inclination of 30 degrees and directed to south. The module power and the module temperature were measured every minute. The 10-minute-mean-values were stored together with the corresponding irradiance data. The main results of this comprehensive program will be reported.