Causes for Yield Shortall
If the power or energy output of the system is not as expected, this yield shortfall could have a number of causes
Errors in forecasting, planning, design and quality assurance of modules occur frequently. In most instances, they cannot be fixed afterwards. High quality design and engineering is required.
Operational - internal
Component errors include inverter defects, loose cable connections, defective fuses, mechanical defects in trackers, module defects (mechanical or pv material) and insulation faults (e.g. from animal bites). Real-time monitoring help with detection and to keep maintenance costs low.
Operational - external
External events beyond the control of the operator include natural disasters, theft, vandalism expropriation. Stakeholders may require insurance against those risks.