The PV plant considers most of the relevant international norms, standards and industry best practices regarding electromechanical installation. However, the PV system is affected by soiling from construction works and residues from the hard water used for cleaning the modules. Furthermore, the module power performance is significantly lower than the expected values. It is recommended to (i) increase cleaning cycles (filtered/soft water), (ii) reinstallation of the temperature sensor and (iii) module power measurements from a larger module sample (and comparison with manufacturer warranties). The estimated production boost expected by the retrofitting actions lies between 3-5%.
The high concentration of dust on top of the modules is likely originated in the construction site next to the system.
Additionally, the water used for cleaning Picture Gallery
the modules leaves a gray residue that intensifies the soiling in the long term.
On the module where the irradiation sensor is located, there is evidence that a cell temperature sensor was previously attached and the surface not cleaned.