The PV plant is heavily affected by soiling due to the not functioning of a cleaning system. Many of the modules have back-sheet damage. Also, the plant capacity is overestimated by 1kW. It is recommended to (i) replace broken modules, (ii) find another cleaning system as the actual one causes permanent shading on the modules, (iii) install a new earthing system, (iv) install a weather station or at least an irradiation sensor on the module plane to quantify and monitor the Performance Ratio, and (v) retrofit the mounting structure. The estimated production boost expected by the retrofitting actions lies between 15 and 25%.
Clamping distance was found not to be appropriate, resulting in micro cracks on modules.
Modules were installed beyond the edge area of the building.