 This study examined the impact of various factors on photovoltaic, PV, module performance across Eurasia and Africa. It found that shallow angle reflectivity has a minimal effect on PV performance, while spectral effects can vary significantly depending on location and module type. Additionally, the study showed that the dependence on irradiance and module temperature can be quite significant, ranging from minus 20% to plus 5%. This article was authored by Thomas Hould and Anna M. Gracia Amillo.