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Measurement procedures for materials used in photovoltaic modules -- Environmental exposures. Accelerated weathering tests of polymeric materials
This part of IEC 62788 defines test procedures to characterize the weatherability of polymeric component materials used in photovoltaic (PV) modules or systems. The methods in this document have been focused on polymeric backsheets and encapsulants, but may be applied to other materials; however, these were not verified as part of the preparation.
This document includes a suite of artificial weathering exposures, consisting of a steady-state application of simulated solar irradiance, temperature, and humidity conditions maintained at stable levels through the weathering test. Cyclic stresses, including thermal and wet/dry cycles are left for future specifications.
Exposures in this document are intended for reference by other standards and as a tool to support research and product development for PV components and modules.
Different exposures may be used to target specific climate/mounting configurations, with the specifics of how to apply the exposures left to those standards (e.g. component characterization standards, module qualification standards).
An informative annex including parametric descriptions of a range of climate/application configurations used in developing the exposure suites is provided as a reference.
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