IV-curves taken at 1000W/m², 200W/m² and in the dark are shown for the front and rear side of a TOPCon 16 busbar M10 cell in both Isc–> Voc and Voc −> Isc direction. a) The hysteresis in the 1st-quadrant is clearly visible due to the long IV-curve sweep required to measure to breakdown (appr. 85ms). There is no indication of a hysteresis effect at reverse breakdown as curves lay directly over each other. b) Same IV-curves but always moved by Isc of correlated intensity. On the front side a low irradiance dependence is visible at voltage above 20V.