Callab PV Cells: 30 Years of High Precision Measurement in Freiburg

If you want to know the efficiency of a solar cell exactly, it is likely that you will land in Freiburg, Germany sooner or later. For 30 years high-precision reference solar cells – and for almost 25 years reference modules – have been measured at the CalLab PV Cells of Fraunhofer ISE. Researchers, producers and …