Researchers from HZB, Bielefeld University, University of Applied Sciences (HTW) Berlin, University of Ljubljana and Ben-Gurion University of the Negev have identified how to realistically accelerate and replicate real‐world degradation in perovskite solar cells (PSCs) by carefully tuning light intensity and electrical bias, rather than relying solely on high‐temperature stress. The team started from a central challenge in perovskite photovoltaics: long‐term stability remains the missing “golden