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BS EN 62788-1-4:2016:2017 Edition

BS EN 62788-1-4:2016:2017 Edition

$142.49

Measurement procedures for materials used in photovoltaic modules – Encapsulants. Measurement of optical transmittance and calculation of the solar-weighted photon transmittance, yellowness index, and UV cut-off wavelength

Published By Publication Date Number of Pages
BSI 2017 26
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IEC 62788-1-4:2016 provides a method for measurement of the optical transmittance of encapsulation materials used in photovoltaic (PV) modules. The standardized measurements in this procedure quantify the expected transmittance of the encapsulation to the PV cell. Subsequent calculation of solar-weighted transmittance allows for comparison between different materials. The results for unweathered material may be used in an encapsulation manufacturer’s datasheets, in manufacturer’s material or process development, in manufacturing quality control (material acceptance), or applied in the analysis of module performance. This measurement method can also be used to monitor the performance of encapsulation materials after weathering, to help assess their durability.

PDF Catalog

PDF Pages PDF Title
6 English
CONTENTS
7 FOREWORD
9 1 Scope
2 Normative references
10 3 Terms and definitions
11 4 Principle
5 Apparatus
6 Test specimens
6.1 Nominal (and unweathered) transmittance to the cell
12 6.2 Weathering studies
13 6.3 Glass for superstrates/substrates
6.4 Number of specimens
6.5 Preconditioning of specimens
7 Measurement procedure
7.1 General
7.2 Specimen preparation
7.3 Instrument calibration (baseline measurements)
14 7.4 Specimen measurements
7.5 Witness measurements
8 Calculation and expression of results
8.1 Post-processing of data
8.2 Calculation of weighted transmittance
15 8.3 Calculation of the Yellowness Index (YI)
8.4 Calculation of the UV cut-off wavelength
9 Uncertainty of measurements
Table 1 – Details of the solar weight transmittance parameters
16 10 Test report
18 Annex A (informative) Advanced analysis of transmittance (absorption coefficients)
20 Annex B (informative) Applying the quantum efficiency of a specific cell technology
22 Bibliography

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BS EN 62788-1-4:2016
$142.49