Loosely hanging cables with low bending radius were found. Damaged modules that pose performance and safety threat found on-site. It is recommended to (i) optimize the cable layout, (ii) increase cleaning activity, (iii) replace damaged modules (iv) retrofit the mounting structure, (v) re-sort and re-string the modules, and (vi) 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 7.5% and 10.9%.
Strings, tables, and inverters should have a suitable labelling (UV-resistant).
The cable layout can be optimized; the minimum cable bending radius is 10x the cable diameter.
A more effective cleaning is recommended to address module cementing.
Damaged modules shall be replaced as they pose performance and safety threat.
Inverter fans shall be cleaned more frequently.
A re-sorting shall be conducted to have lower performing modules and modules with same power class in the same string for each case, or at least the same MPPT.
Damaged structure vertical posts shall be replaced to restore the structure functionality. Rusted components shall be replaced if possible. To prevent such problems, metal objects vulnerable to corrosion can be painted with zinc.
If possible, modules in the corner shall be moved away from the parapet wall to facilitate easier O&M access.
If possible, table with higher tilt angle shall be spaced adequately to reduce the effects of shading.
A weather station, or at least an irradiation sensor on the module plane shall be installed.