Loss investigation
Move from low output to a testable diagnosis.
SolarOZ structures performance-loss investigations around the available data, operating context and actions the plant team can take next.
Discuss the performance issueEvidence before conclusion
Separate data quality, availability, curtailment, equipment and environmental loss pathways.
Separate data quality, availability, curtailment, equipment and environmental loss pathways.
01 / BASELINE
Define the performance gap
Confirm the reference period, expected behaviour, data quality and operating constraints before assigning a cause.
02 / SEPARATE
Test likely loss pathways
Review availability, curtailment, inverter and string behaviour, communications, soiling and relevant field evidence.
03 / PRIORITISE
Set the next action
Rank the likely causes and identify the inspection, test, operating change or repair that can reduce uncertainty.
Inputs that can support the investigation
- SCADA, meter, inverter, alarm and availability records.
- Weather and irradiance information with known quality limitations.
- Plant configuration, maintenance history and recent operating changes.
- String, thermal, IV-curve or inspection evidence where relevant and available.
- Soiling observations, cleaning records and rainfall context.
Not every project requires every input. The diagnostic scope should be proportionate to the value of the decision and the confidence needed.
Related technical guidance
Bring the symptom and the available evidence.
SolarOZ can help define a proportionate path from performance gap to next action.