The system's DC cabling is in poor condition and should be fixed. The monitoring system shows incorrect values and the system is partially shaded by trees and cables. Furthermore, the modules showed substantial underperformance and some are affected by shunts. It is recommended to (i) repair the monitoring system, (ii) improve plant cleaning, (iii) replace modules exceeding the manufacturer’s guaranteed performance drop and (iv) replace modules with defects shunts or broken diodes. The estimated production boost caused by the retrofitting actions lies between 5-14%.
String cables damaged by or in contact with sharp edges were spotted.
Some parts of the plant are permanently shaded by trees or cables. The simulation of the system showed a shading loss of 1.5%.
Total Estimated Energy Loss
The entire DC wiring should be checked for safety.
Broken modules that do not meet the warranty requirements should be replaced.
Local shading caused by trees or cables should be removed.
The frequency of cleaning should be increased and significant dirt should be removed.
PV modules showing power drops above the warranty conditions should be replaced. If the replacement is not possible, the modules should be regrouped in power classes within the same string and assigned to individual MPPTs.