Performance degradation of grid-tied photovoltaic modules in a hot-dry climatic condition

Adam Suleske, Jaspreet Singh, Joseph Kuitche, Govindasamy TamizhMani

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

    4 Scopus citations

    Abstract

    The crystalline silicon photovoltaic (PV) modules under open circuit conditions typically degrade at a rate of about 0.5% per year. However, it is suspected that the modules in an array level may degrade, depending on equipment/frame grounding and array grounding, at higher rates because of higher string voltage and increased module mismatch over the years of operation in the field. This paper compares and analyzes the degradation rates of grid-tied photovoltaic modules operating over 10-17 years in a desert climatic condition of Arizona. The nameplate open-circuit voltages of the arrays ranged between 400 and 450 V. Six different types/models of crystalline silicon modules with glass/glass and glass/polymer constructions were evaluated. About 1865 modules were inspected using an extended visual inspection checklist and infrared (IR) scanning. The visual inspection checklist included encapsulant discoloration, cell/interconnect cracks, delamination and corrosion. Based on the visual inspection and IR studies, a large fraction of these modules were identified as allegedly healthy and unhealthy modules and they were electrically isolated from the system for currentvoltage (I-V) measurements of individual modules. The annual degradation rate for each module type is determined based on the I-V measurements.

    Original languageEnglish (US)
    Title of host publicationReliability of Photovoltaic Cells, Modules, Components, and Systems IV
    DOIs
    StatePublished - Nov 29 2011
    EventReliability of Photovoltaic Cells, Modules, Components, and Systems IV - San Diego, CA, United States
    Duration: Aug 22 2011Aug 25 2011

    Publication series

    NameProceedings of SPIE - The International Society for Optical Engineering
    Volume8112
    ISSN (Print)0277-786X

    Other

    OtherReliability of Photovoltaic Cells, Modules, Components, and Systems IV
    CountryUnited States
    CitySan Diego, CA
    Period8/22/118/25/11

    Keywords

    • Degradation
    • Failure modes
    • Reliability

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics
    • Computer Science Applications
    • Applied Mathematics
    • Electrical and Electronic Engineering

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  • Cite this

    Suleske, A., Singh, J., Kuitche, J., & TamizhMani, G. (2011). Performance degradation of grid-tied photovoltaic modules in a hot-dry climatic condition. In Reliability of Photovoltaic Cells, Modules, Components, and Systems IV [81120P] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 8112). https://doi.org/10.1117/12.894928