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Potential Induced Degradation

Key Takeaways

72% of BOMs produced in 2024 degraded by < 2% following PID(-).

Results remained aligned across cell technologies and laminate types.

PID is typically lower for positive-polarity than for negative-polarity.

Similar to the 2024 Scorecard, 9% of BOMs experienced a failure during PID testing.

PID Test Result Spotlight

Initial

The pre-stress image shows no indication of PID susceptibility.

PID192(-)

After 192 hours of PID(-) testing, most cells show significant darkening due to an accumulation of polarization charges.

UV Recovery

After 2 kWh/m2 of UV exposure, much of the polarization effects have been reversed.

Power Degradation of PID BOMs

See Potential Induced Degradation Top Performers

1 Peter Hacke, Cecile Molto, Dylan Colvin, Ryan Smith, Farrukh Ibne Mahmood, Fang Li, Jaewon Oh, Govindasamy Tamizhmani and Hubert Seigneur. EPJ Photovolt., 16 (2025) 16. Polarization-type potential-induced degradation in bifacial PERC modules in the field. https://doi.org/10.1051/epjpv/2025004

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