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Across published field studies reviewed by NREL, about how much output do PV modules typically lose per year?

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  1. About 5% per year
  2. About 0.05% per year
  3. About 0.5% per year

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References

  1. NREL: Photovoltaic Degradation Rates, An Analytical Review (Jordan and Kurtz) docs.nlr.gov/docs/fy12osti/51664.pdf Checked 2026-10-10.

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