Performance and Reliability of Thermally Conductive Backsheets (TCB)

Ashwini Pavgi, Jaewon Oh, Sai Tatapudi, Govinda Samy Tamizhmani

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

Abstract

Thermally conductive backsheets (TCBs) have a potential to reduce the module operating temperature (performance) and increase the lifetime (reliability) of photovoltaic (PV) modules. In this study, various commercially available TCBs were acquired and investigated using the field exposure approach for thermal performance evaluations and accelerated testing approach for the power durability evaluations. Four TCBs were selected and their thermal performance and power durability evaluations were performed against conventional Tedlar-PET-Tedlar (TPT) backsheet. Nine-cell mini PV modules constructed with the selected TCBs and TPT were installed at three sites with hot-dry with high wind speed, hot-dry with low wind speed and temperate climatic conditions. The modules with TCBs reduced the module operating temperature under certain field conditions. These modules with selected TCBs and TPT were also tested as per IEC 61215 standard and Beyond Qualification Plus protocol for minimum reliability and durability. None of the mini modules showed significant degradation (less than 3% in power loss) after the DH1000, UV/TC50/HF10, TC200 and UV weathering tests. One TCB showed a significant change in yellowness index after the DH 1000h, TC200 and UVITC50/HF10 stress tests. This study demonstrates that the selected TCBs have potential to increase the energy production and the lifetime due to reduced operating temperatures compared to TPT-based modules.

Original languageEnglish (US)
Title of host publication2020 47th IEEE Photovoltaic Specialists Conference, PVSC 2020
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages775-780
Number of pages6
ISBN (Electronic)9781728161150
DOIs
StatePublished - Jun 14 2020
Event47th IEEE Photovoltaic Specialists Conference, PVSC 2020 - Calgary, Canada
Duration: Jun 15 2020Aug 21 2020

Publication series

NameConference Record of the IEEE Photovoltaic Specialists Conference
Volume2020-June
ISSN (Print)0160-8371

Conference

Conference47th IEEE Photovoltaic Specialists Conference, PVSC 2020
CountryCanada
CityCalgary
Period6/15/208/21/20

Keywords

  • cell temperature
  • thermally conductive backsheets
  • UV weathering test
  • yellowness index

ASJC Scopus subject areas

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

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