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IEC 60904-10
Edition 3.0 2020-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Photovoltaic devices –
Part 10: Methods of linear dependence and linearity measurements
Dispositifs photovoltaïques –
Partie 10: Méthodes de mesure de la dépendance linéaire et de la linéarité
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IEC 60904-10
Edition 3.0 2020-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Photovoltaic devices –
Part 10: Methods of linear dependence and linearity measurements
Dispositifs photovoltaïques –
Partie 10: Méthodes de mesure de la dépendance linéaire et de la linéarité
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 27.160 ISBN 978-2-8322-8802-3
– 2 – IEC 60904-10:2020 © IEC 2020
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 7
2 Normative references . 8
3 Terms and definitions . 8
4 Device selection . 9
5 Apparatus . 10
5.1 General requirements common to all procedures . 10
5.2 Apparatus for measurement of all linear dependences under natural sunlight
or with a solar simulator . 11
5.3 Apparatus for measurement of all linear dependences of short-circuit current
by differential spectral responsivity measurements . 12
5.4 Apparatus for linearity measurement of short-circuit current by two-lamp
method . 12
5.5 Apparatus for linearity measurement of short-circuit current by N-lamp
method . 12
6 Procedures to measure linearity and other linear dependences under natural
sunlight or with a solar simulator . 12
6.1 Additional general requirements for natural sunlight . 12
6.2 Mounting under natural sunlight . 13
6.3 Mounting with a solar simulator . 13
6.4 Linear dependence measurements versus irradiance . 13
6.5 Linear dependence measurements versus temperature . 16
7 Procedures to measure linearity and other linear dependence of short-circuit
current from differential spectral responsivity . 17
7.1 Linearity measurements . 17
7.2 Linear dependence measurements of short-circuit current versus
temperature . 18
8 Procedure for short-circuit current linearity measurement by the two-lamp or the
N-lamp methods . 18
8.1 Background. 18
8.2 Measurement procedure by the two-lamp method . 19
8.3 Measurement procedure by the N-lamp method . 20
9 Calculation of linear dependence and linearity . 21
9.1 General considerations . 21
9.2 Measurement uncertainty evaluation . 21
9.3 Determination of deviations from a generic linear dependence . 22
9.3.1 Generic case . 22
9.4 Determination of the short-circuit current non-linearity versus irradiance . 22
9.5 Determination of the short-circuit current non-linearity versus irradiance
using the two-lamp method . 23
9.6 Determination of the short-circuit current non-linearity versus irradiance
using the N-lamp method . 24
9.7 Requirements for maximum deviations from the ideal linear function . 25
10 Report . 26
Bibliography . 27
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
PHOTOVOLTAIC DEVICES –
Part 10: Methods of linear dependence and linearity measurements
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International Standard IEC 60904-10 has been prepared by IEC technical committee 82: Solar
photovoltaic energy systems.
This third edition cancels and replaces the second edition published in 2009. This edition
constitutes a technical revision.
This edition inc
...