Fact: Figures/details may be anonymized for data protection reasons; the methodology reflects real projects.
750 kWpPlant size
≈ 30%Underperformance vs. forecast
BestandIssue occurred during operation
ErgebnisTechnische Ursache identifiziert
Situation
An operator reported persistently low yields compared to forecasts and expected values. Monitoring showed deviations, but no clear cause. The goal was solid evidence including root-cause reasoning and an action plan.
Questions
- Is the underperformance technically justified and quantifiable?
- Welche Komponenten/Strings sind betroffen?
- Which measures lead to sustained yield improvement?
Actions taken
- Data review: Yield data, weather correlation, plausibility, comparison periods.
- String-/Planing pausability: Wiring, string lengths, MPP ranges, design documents.
- On-Site Inspection: Visual inspection, documentation, as-built vs. target comparison.
- Measurement: electrical tests (string-specific) and verification of anomalies.
- Result: Root-cause rationale, yield impact, actions + prioritization.
Result
The analysis revealed a combination of causes including fehlerhafter Stringauslegung and sub-areas with deviating performance, causing some strings to operate outside optimal ranges. The deviation was reproducible and the yield impact could be quantified.
Outcome: Technical root cause documented in a traceable way, underperformance quantified, action plan created (e.g., wiring corrections/component checks/optimization depending on findings).
Benefits for the client
- Robust basis for decisions (warranty/insurance/installer)
- Klare technische Argumentation statt Vermutungen
- Concrete actions with priority and expected impact
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