Indoor-outdoor measurement inter-comparison of c-Si concentrating photovoltaic cells at 1X to 300X

In this work the authors show results of a measurement inter-comparison campaign that saw the cooperation of the University of Applied Sciences and Arts of Southern Switzerland (SUPSI-ISAAC, indoor characterization), the Italian National Agency for New Technologies, Energy and Sustainable Economic Development (ENEA, outdoor characterization) and the University of Cyprus (indoor and outdoor characterization). The measurement campaign is extremely useful to improve the know-how of the centres involved. Aside the well-known spectral mismatch effects, the importance of the “capacitive effect” is highlighted in this work, which arises when the tested high-efficiency CPV cell are characterized indoor on a pulsed solar simulator, depending on the duration of the pulse.