Spectral Rear Irradiance Testing and Modeling for Degradation and Performance of Solar Fields
This work investigates how the spectrum of irradiance incident on the rear of solar modules impacts the degradation and performance of backsheets. We model the spectral irradiance incident on the rear of modules through raytrace simulations and validate with measured field data collected from a 75kW single axis-tracked bifacial test site. A generic equation to estimate relative degradation is proposed, and we show that current acceleration factors for UV damage in chambers can be sub-estimate up to 4.5% absolute from the usually assumed 10% dosage on the rear surfaces.
- Research Organization:
- National Renewable Energy Laboratory (NREL), Golden, CO (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Solar Energy Technologies Office (EE-4S)
- DOE Contract Number:
- AC36-08GO28308
- OSTI ID:
- 1913962
- Report Number(s):
- NREL/CP-5K00-85064; MainId:85837; UUID:552cfc55-4ad8-47d0-8957-5b13df76d6ff; MainAdminID:68509
- Country of Publication:
- United States
- Language:
- English
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