Several modules with open j-boxes and corroded contacts were found, posing severe threat to people. Loosely hanging cables with low bending radius were found. Modules are significantly soiled. It is recommended to (i) replace modules with corroded contacts, (ii) increase the cleaning cycles, (iii) reestablish the earthing connection between structures, (iv) retrofit the mounting structure, and (v) install a weather station or at least an irradiation sensor on the module plane. The estimated production boost expected by the retrofitting actions lies between 20% and 25%.