Characterization of Real-World and Accelerated Exposed PV Module Backsheet Degradation

Conference · Tue Oct 06 04:00:00 EDT 2020

DOI:https://doi.org/10.1109/PVSC40753.2019.9198979· OSTI ID:1726063

Wieser, Raymond; Wang, Yu; Fairbrother, Andrew; Napoli, Sophia; Julien, Scott; Hauser, Adam W.; Ji, Liang; Wan, Kai-tai; O'Brien, Gregory S.; French, Roger H.; Kempe, Michael D.; Gu, Xiaohong; Boyce, Kenneth P.; Bruckman, Laura S.

Backsheet degradation is key to maintaining the lifetime of photovoltaic (PV) modules. Cracking, delamination, bubbling, and discoloration are main types of degradation. PV modules were collected from PV installations in multiple climatic zones. Multiple types of backsheets were obtained with poly(ethylene teraphlate) (PET) and polyamide air side layers being the largest number of backsheets retrieved. Multiple commercial PV backsheets were exposed to multiple accelerated exposures and key degradation mechanisms were identified. Polyamide backsheets showed cracking in retrieved modules and under accelerated exposures. Poly(vinylidene fluoride) (PVDF) and poly(vinyl fluoride) (PVF) showed the highest stability in retrieved and accelerated exposures. While polyamide had the largest amount of large scale degradation.

• 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: 1726063
• Report Number(s): NREL/CP-5K00-78482; MainId:32399; UUID:f7fc1fa6-64e4-477d-bec2-bd8f7c4a7d1a; MainAdminID:18890
• Country of Publication: United States
• Language: English

Related Subjects

41 EE - Solar Energy Technologies Office (EE-4S)
accelerated exposures
backsheet degradation
cracking