Characterization of Electrical Parameters of Cracked Crystalline Silicon Solar Cells in Photovoltaic Modules

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Abstract

In this work we investigate the characteristics of solar cells cracks in photovoltaic (PV) modules for understanding the extent to which the solar cell electrical parameters change due to cell crack degradation. The experimental investigation is performed on two custom nine-cell mini-modules of mono- and multi-crystalline silicon, respectively, where each solar cell in the module has a junction box, allowing individual and module level characterization. Results show that power loss caused by cell cracks is driven primarily by a reduction of the cell’s maximum power point current, in particular B type cracks. C cracks also affect the short circuit current of the cells, whereas cells with combined B and C cracks show the most reduction of the short circuit current. Equivalent circuit diode model curve fitting and analysis of the light or dark I-V curves proved of limited used in analyzing degradation of cracked cells, as the model assumptions break down. However, a comparative analysis of dark and light I-V curves with a Suns-Voc curve was better suited for understanding the evolution of diode parameters on cracked cells for increasing levels of degradation.
Original languageEnglish
Title of host publicationProceedings of 48th IEEE Photovoltaic Specialists Conference
Number of pages8
PublisherIEEE
Publication date2021
Pages0846-0853
ISBN (Print)978-1-6654-3018-0
DOIs
Publication statusPublished - 2021
EventInternational 2021 IEEE Photovoltaic Specialists Conference - Virtual conference
Duration: 20 Jun 202125 Jun 2021

Conference

ConferenceInternational 2021 IEEE Photovoltaic Specialists Conference
LocationVirtual conference
Period20/06/202125/06/2021

Keywords

  • Solar cell
  • Photovoltaic modules
  • I-V characterization
  • Cell cracks
  • Electroluminescence
  • Power loss

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