Definition
Light Induced Degradation (LID) is the initial power loss in PV modules during the first weeks of sunlight exposure. PERC: 1.5–2.5% LID. TOPCon: <0.5%. HJT: <0.3%. Accounted for in 25-year warranty calculations.
Key Takeaways
- LID = initial PV module power loss under first light.
- PERC: 1.5–2.5%. TOPCon: <0.5%. HJT: <0.3%.
- Manufacturers spec year-1 power ≥ 98% to account for LID.
- TOPCon/HJT advantage in cumulative 25-year output.
Frequently Asked Questions
1 commonly searched questions about LID (Light Induced Degradation).
What causes LID?
Boron-oxygen defect formation under light in PERC p-type cells. Manifests as initial 1.5–2.5% loss. n-type TOPCon and HJT cells use different boron-free chemistry; minimal LID.
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