Overall Performance Losses and Activated Mechanisms in Double Glass and Glass-backsheet Photovoltaic Modules with Monofacial and Bifacial PERC Cells, under Accelerated Exposures

Liu, Jiqi; Venkat, Sameera Nalin; Braid, Jennifer L.; Yu, Xuanji; Brownell, Brenton; Li, Xinjun; Jaubert, Jean-Nicolas; Choudhury, Kaushik Roy; Bruckman, Laura S.; French, Roger H.

doi:10.1109/pvsc48317.2022.9938783

Overall Performance Losses and Activated Mechanisms in Double Glass and Glass-backsheet Photovoltaic Modules with Monofacial and Bifacial PERC Cells, under Accelerated Exposures

Conference · Sun Jun 05 04:00:00 EDT 2022 · 2022 IEEE 49th Photovoltaics Specialists Conference (PVSC)

DOI:https://doi.org/10.1109/pvsc48317.2022.9938783· OSTI ID:1900599

Liu, Jiqi ^[1]; Venkat, Sameera Nalin ^[2]; Braid, Jennifer L. ^[3]; Yu, Xuanji ^[2]; Brownell, Brenton ^[4]; Li, Xinjun ^[4]; Jaubert, Jean-Nicolas ^[5]; Choudhury, Kaushik Roy ^[6]; Bruckman, Laura S. ^[2]; French, Roger H. ^[2]

Case Western Reserve Univ., Cleveland, OH (United States); Case Western Reserve University
Case Western Reserve Univ., Cleveland, OH (United States)
Case Western Reserve Univ., Cleveland, OH (United States); Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Cybrid Technologies Inc., Jiangsu (China)
CSI Solar Co. Ltd., Jiangsu (China)
DuPont Photovoltaic Solutions, Wilmington, DE (United States)

Commercial PV modules have various packaging choices nowadays, which influence their long-term reliability. This study compared the degradation behaviors of sixteen module variants from two brands with varying encapsulant materials (EVA or POE), encapsulant types, module architectures (GB or DG), and cell types (monofacial or bifacial) using null hypothesis testing to determine statistical significant findings. The modules were exposed for 2,520 hours under two accelerated exposures: modified damp heat (mDH) and modified damp heat with full-spectrum light (mDH+FSL). For both brands, two DG module variants with UV-Cutoff rear encapsulant are found to have significantly lower average power loss than the module variants of EVA+GB with opaque rear encapsulant after each accelerated exposure. Metallization interconnect corrosion is identified as the primary degradation mechanism. Furthermore, unsupervised hierarchical clustering finds that the degradation behaviors of modules from one brand with a more strict manufacturing quality control depends on module architectures only.

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Research Organization:: Case Western Reserve Univ., Cleveland, OH (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office; USDOE National Nuclear Security Administration (NNSA)

DOE Contract Number:: EE0008550; NA0003525

OSTI ID:: 1900599

Conference Information:: Journal Name: 2022 IEEE 49th Photovoltaics Specialists Conference (PVSC)

Country of Publication:: United States

Language:: English

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