Calibration of solar cells beyond STC using the DSR method

Traceable measurements of PV devices is essential ensuring worldwide comparability of PV products. However, a continuously growing market and increasing diversity of PV products and their application raises the demand for calibrations and testing services beyond the well-established standard test conditions (STC). Examples for this development is energy rating of PV modules and the operation of solar cells in space. The PV-calibration laboratory at PTB meets this demand by extending its calibration services using the differential spectral responsivity (DSR) method with expanded uncertainties of 0,4% to 0,7% (k=2).