The PV plant is affected by significant soiling due to pollution, near shadings caused by surroundings, and modules with cracked cells. A sub-array is disconnected, and damaged modules were found. Earthing, cabling, and structure are in poor conditions. It is recommended to: (i) increase the cleaning frequency, (ii) rearrange the strings based on the shading, (iii) re-sort the modules according to level of mechanical damage, (iv) install an irradiation sensor on the tilted plane to compute and check the Performance Ratio, and (v) replace damaged modules. The estimated production boost expected by the retrofitting actions lies between 20% and 30%.
Earthing strips used to connect the system for grounding were disconnected or broken.