skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

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

Conference · · 2022 IEEE 49th Photovoltaics Specialists Conference (PVSC)
 [1];  [1];  [2];  [1];  [3];  [3];  [4];  [5];  [1];  [1]
  1. Case Western Reserve Univ., Cleveland, OH (United States)
  2. Case Western Reserve Univ., Cleveland, OH (United States); Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  3. Cybrid Technologies Inc., Jiangsu (China)
  4. CSI Solar Co. Ltd., Jiangsu (China)
  5. 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.

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
Journal Information:
2022 IEEE 49th Photovoltaics Specialists Conference (PVSC), Conference: 2022 IEEE 49th Photovoltaics Specialists Conference (PVSC), Philadelphia, PA (United States), 5-10 Jun 2022
Country of Publication:
United States

References (20)

A Pragmatic Approach to Statistical Testing and Estimation (PASTE) journal December 2018
A polyolefin encapsulant material designed for photovoltaic modules: from perspectives of peel strength and transmittance journal November 2019
Transparent Backsheets for Bifacial Photovoltaic Modules conference June 2020
The Performance of Double Glass Photovoltaic Modules under Composite Test Conditions journal September 2017
Long-term reliability of silicon wafer-based traditional backsheet modules and double glass modules journal January 2015
An Introduction to Statistical Learning book January 2021
Relation between degradation of polymeric components in crystalline silicon PV module and climatic conditions: A literature review journal April 2019
Ward’s Hierarchical Agglomerative Clustering Method: Which Algorithms Implement Ward’s Criterion? journal October 2014
Using the confidence interval confidently journal October 2017
Glass vs. Backsheet: Deconvoluting the Role of Moisture in Power Loss in Silicon Photovoltaics With Correlated Imaging During Accelerated Testing journal January 2022
Properties and degradation behaviour of polyolefin encapsulants for photovoltaic modules
  • Oreski, Gernot; Omazic, Antonia; Eder, Gabriele Christine
  • Progress in Photovoltaics: Research and Applications, Vol. 28, Issue 12
journal August 2020
Field-Aged Glass/Backsheet and Glass/Glass PV Modules: Encapsulant Degradation Comparison journal March 2020
Inference by Eye: Confidence Intervals and How to Read Pictures of Data. journal January 2005
LIII. On lines and planes of closest fit to systems of points in space journal November 1901
The results of performance measurements of field-aged crystalline silicon photovoltaic modules journal June 2009
Degradation mechanisms and partial shading of glass-backsheet and double-glass photovoltaic modules in three climate zones determined by remote monitoring of time-series current–voltage and power datastreams journal August 2021
Research on the effect of encapsulation material on anti-PID performance of 1500 V solar module journal February 2020
Comparison of Degradation Behavior of Newly Developed Encapsulation Materials for Photovoltaic Applications under Different Artificial Ageing Tests journal January 2021
Statistical Methods and Scientific Induction journal January 1955
Analysis of glass-glass modules conference September 2018