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ILNAS-EN IEC 60904-7:2019 Edition 10/2019
Photovoltaic devices - Part 7: Computation of the spectral mismatch correction for measurements of photovoltaic devices
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Abstract

IEC 60904-7:2019 is available as IEC 60904-7:2019 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.

IEC 60904-7:2019 describes the procedure for correcting the spectral mismatch error introduced in the testing of a photovoltaic device, caused by the mismatch between the test spectrum and the reference spectrum (e.g. AM1.5 spectrum) and by the mismatch between the spectral responsivities (SR) of the reference device and of the device under test and therewith reduce the systematic uncertainty. This procedure is valid for single-junction devices but the principle may be extended to cover multi-junction devices. The purpose of this document is to give guidelines for the correction of the spectral mismatch error, should there be a spectral mismatch between the test spectrum and the reference spectrum as well as between the reference device SR and the device under test SR. The calculated spectral mismatch correction is only valid for the specific combination of test and reference devices measured with a particular test spectrum. This fourth edition cancels and replaces the third edition published in 2008. The main technical changes with respect to the previous edition are as follows: - For better compatibility and less redundancy, the clause “Determination of test spectrum” refers to IEC 60904-9. - The spectral mismatch factor is called SMM instead of MM to enable differentiation to the angular mismatch factor AMM and spectral angular mismatch factor SAMM. - Formulae for the derivation and application of the spectral mismatch factor SMM are added. - Links to new standards are given, e.g. concerning multi-junction devices. - Corrected wording (responsivity instead of response and irradiance instead of intensity).

Status

Standard - Active

Origin

Technical Committee :
CLC/TC 82 : Solar photovoltaic energy systems

Implementation

start of the vote on the project    10/11/2017   date of ratification (dor)    24/09/2019
end of the vote on the project    26/01/2018   date of anouncement (doa)    24/12/2019
start of the vote on the final project    24/05/2019   date of publication (dop)    24/06/2020
end of the vote on the final project    05/07/2019   date of withdrawal (dow)    24/09/2022


Publication Official Journal
of the Grand-Duchy of Luxembourg
20/11/2019
Reference Mémorial A N° 280

Relations

Relations to international standards
IEC 60904-7:201X 
IEC 60904-7:2019 

International Classification for Standards (ICS codes) :

27.160 : Solar energy engineering

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