Extended Accelerated Stress Testing (EAST) of Glass/Glass, Glass/Backsheet and Glass/Transparent Backsheet PV Modules: Influence of EVA and POE Encapsulants: Preprint

Akash Kumar, Ashwini Pavgi, Peter Hacke, Kaushik Roy Choudhury, GovindaSamy TamizhMani

Research output: Contribution to conferencePaper

Abstract

This paper presents the indoor extended accelerated stress testing (EAST) results of glass/glass (GG), glass/backsheet (GB) and glass/transparent backsheet (GT) modules having identical cells and two different encapsulant types, ethyl-vinyl-acetate (EVA) and polyolefin-elastomer (POE). Six 4-cell modules having the above-mentioned construction combinations were subjected to extended ultraviolet (UV; 600 kWh/m2), damp-heat (DH; 2000 hours) and thermal-cycling (TC; 600 cycles) tests. The post-stress UV fluorescent imaging, electroluminescent imaging, reflectance spectrophotometry and colorimetry results indicated that the grid finger degradation and encapsulant browning are slightly higher in the GG modules compared to the GB modules. The post-stress IV test results indicated, in general, that the GG/EVA modules tend to perform inferior to the GG/POE modules with the EAST evaluation.
Original languageAmerican English
Number of pages6
StatePublished - 2022
Event49th IEEE Photovoltaic Specialists Conference (PVSC 49) - Philadelphia, Pennsylvania
Duration: 5 Jun 202210 Jun 2022

Conference

Conference49th IEEE Photovoltaic Specialists Conference (PVSC 49)
CityPhiladelphia, Pennsylvania
Period5/06/2210/06/22

Bibliographical note

See NREL/CP-5K00-85051 for paper as published in proceedings

NREL Publication Number

  • NREL/CP-5K00-83497

Keywords

  • EVA
  • glass/backsheet
  • glass/glass
  • indoor accelerated stress testing
  • POE
  • reliability

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