Manufacturing Induced Bending Stresses: Glass-Glass vs. Glass-Backsheet

Ian M. Slauch, Saurabh Vishwakarma, Jared Tracy, William Gambogi, Rico Meier, Farhan Rahman, James Y. Hartley, Mariana I. Bertoni

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Scopus citations


The architecture of a photovoltaic module directly influences its mechanical stability, affecting cell crack propagation and contributing to the existence and distribution of stresses. Herein, we evaluate cell deflection using X-Ray Topography (XRT) and compare resulting stresses using both thin-plate theory and Finite Element Analysis (FEA). Countering the common belief, we show that glass/glass module architectures exhibit higher bending induced cell stresses during module fabrication. These residual stresses superimpose with stresses experienced in the field and may lead to more frequent cell breakage.

Original languageEnglish (US)
Title of host publication2021 IEEE 48th Photovoltaic Specialists Conference, PVSC 2021
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages6
ISBN (Electronic)9781665419222
StatePublished - Jun 20 2021
Event48th IEEE Photovoltaic Specialists Conference, PVSC 2021 - Fort Lauderdale, United States
Duration: Jun 20 2021Jun 25 2021

Publication series

NameConference Record of the IEEE Photovoltaic Specialists Conference
ISSN (Print)0160-8371


Conference48th IEEE Photovoltaic Specialists Conference, PVSC 2021
Country/TerritoryUnited States
CityFort Lauderdale


  • bifacial
  • deflection
  • glass-backsheet modules
  • glass-glass modules
  • stress

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering


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