Results of four European round-robins on short-circuit current temperature coefficient measurements of photovoltaic devices of different size

•Four inter-laboratory comparisons of α TC measurements of PV devices are presented.•The comparisons included reference cells, bare cells and full-size modules.•The results were obtained by spectral as well as integral procedures.•Results for αrel are presented showing good agreement between all the applied methods.•Comparison of some spectral TC measurements is also shown and discussed.