Cables layout with loosely hanging cables and low bending radius were found. Joints and structures are rusted. Modules were observed to be heavily soiled. It is recommended to (i) optimize cable layout to have optimal bending radius, (ii) increase the cleaning frequency to reduce performance loss and further module damage, (iii) provide safety railings for easier access for the O&M team, and (iv) install a weather station or at least an irradiation sensor on the module plane to monitor the performance ratio. The estimated production n boost expected by the retrofitting actions lies between 18% and 20%.
The system performance was affected by soiling loss of 21%, estimated from IV curve measurements. IR analysis shows presence of hotspots from soiling. Such hotspots may indicate irreversible cell damage due to shading from soiling.