Evaluating the Durability of Balance of Systems Components Using Combined-Accelerated Stress Testing

Research output: NRELPresentation

Abstract

The degradation of photovoltaic (PV) balance of systems (BoS) components is not well-studied, but the consequences include offline modules, strings, and inverters; system shutdown; arc faults; and fires. A utility provider experienced a ~30% failure rate in their power transfer chain, originally attributed to branch connectors. Field-failed specimen assemblies were therefore examined, consisting of cable connector, branch connector, and discrete fuse components. Previous papers and presentations have focused on the development of the test method using a benchtop prototype. This presentation covers the early results of C-AST aging of static and dynamic specimens.
Original languageAmerican English
Number of pages19
StatePublished - 2022

Publication series

NamePresented at the International Energy Agency (IEA) Photovoltaic Power Systems (PVPS) Task 13 Meeting, 3-7 October 2022

NREL Publication Number

  • NREL/PR-5K00-84230

Keywords

  • balance of systems
  • branch connector
  • C-AST
  • DSC
  • durability
  • DuraMAT
  • fuse
  • reliability
  • XCT

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