Broken cables, exposed wires, and faulty system components were observed. Several damaged modules found on site. It is recommended to (i) improve cleaning activity, (ii) replace broken cables (iii) replace faulty components and inverter, (iv) replace damaged modules, (v) retrofit the mounting structure, (vi) re-sort the lower performing modules, and (vii) 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 13.2% and 63.2%.
Strings, tables, and inverters should have a suitable labelling (UV-resistant).
Broken cables and exposed wires shall be immediately replaced due to serious safety concerns.
The 3 modules removed from the string shall be replaced.
Damaged modules shall be replaced since they pose both performance and safety threat.
Non-functional inverter shall be investigated further for root-cause and get replaced to fully utilize the generation. Observed faulty safety components such as the ACB, and fuses shall also be replaced.
A re-sorting shall be conducted to have lower performing modules in the same string, or at least the same MPPT.
The iron rods in front of the modules shall be relocated to avoid hotspot from permanent shading.
Rusted clamps used in the structure shall be replaced. To prevent such problems, metal objects vulnerable to corrosion can be painted with zinc. Sharp edges on purlins must be secured to improve safety of O&M personnel.
A weather station, or at least an irradiation sensor on the module plane shall be installed.