The PV plant makes no profit because it is not connected to the electricity meter. Furthermore, the installed system is affected by near shading. Some parts of the site are poorly ventilated. There are no walkways to carry out the O&M tasks. It is recommended to (i) connect the electricity meter, (ii) install an irradiation sensor (iii) continuous cleaning of the modules and the inverter-fan filters, (iv) re-stringing of shaded modules, and (v) trim surrounding trees. The estimated production boost expected by the retrofitting actions lies between 3 and 12%.
Poor Cable Management, which makes O&M activities more difficult.
Cables should have suitable labelling and should be protected from UV.
The metering system must be connected in order to gain any financial benefits from the site.
A weather station, or at least an irradiation sensor on the module plane, shall be installed so that the performance of the system can be properly determined.
The trees surrounding the system shall be trimmed if allowed. Otherwise, a re- stringing of the modules shall be conducted in the following way: modules with similar shading conditions shall be installed in the same string or at least assigned to one MPPT.
The cleaning of the modules and inverter filter should be carried out frequently. Especially the elimination of bird drops could be implemented in the maintenance.
A re-stringing of the modules from the shaded areas shall be conducted in the following way: modules with similar shading conditions shall be installed in the same string or at least assigned to individual MPPTs.
The site should have walkways installed in order to carry out O&M tasks.