KEYWORDS: Reliability, Solar cells, Solar concentrators, Manufacturing, Receivers, Space operations, Photovoltaics, Temperature metrology, Solar energy, Simulation of CCA and DLA aggregates
The concentrator photovoltaic (CPV) industry has created a qualification standard - IEC 62108. This standard applies to
receivers and modules - certainly the most appropriate configurations for qualification and safety testing. CPV systems
manufacturers expect the solar cells they buy to be qualified and highly reliable. However, the IEC qualification
standard does not apply to the configurations offered by multijunction cell manufacturers and there are no accepted
reliability test standards.
This paper describes how one cell manufacturer adapted IEC 62108 to perform qualification testing on bare cells. Damp
heat and high temperature durability qualification/reliability test results are shown for first generation CPV cells (C1MJ).
Typical meteorological year data is analyzed for three locations to look at high temperature durability and to propose
thermal cycle reliability test conditions. Space qualification testing is shown to envelope terrestrial thermal cycling and a
thermal cycling reliability test is proposed. The space heritage of commercially available cells is reviewed to provide
some background on reliability of multijunction cells.
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