EN IEC 60904-4:2019

Photovoltaic devices - Part 4: Reference solar devices - Procedures for establishing calibration traceability

IEC 60904-4:2019 is available as IEC 60904-4:2019 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 60904-4:2019 sets the requirements for calibration procedures intended to establish the traceability of photovoltaic (PV) reference devices to SI units as required by IEC 60904-2. This document applies to PV reference devices that are used to measure the irradiance of natural or simulated sunlight for the purpose of quantifying the performance of PV devices. The use of a PV reference device is required in many standards concerning PV (e.g. IEC 60904-1 and IEC 60904-3). This document has been written with single-junction PV reference devices in mind, in particular crystalline silicon, but it is sufficiently general to include other single-junction technologies. This second edition cancels and replaces the first edition published in 2009. This edition includes the following significant technical changes with respect to the previous edition: modification of standard title; - inclusion of working reference in traceability chain; - update of WRR with respect to SI; - revision of all methods and their uncertainties in annex - harmonization of symbols and formulae with other IEC standards.

Photovoltaische Einrichtungen - Teil 4: Referenz-Solarelemente - Verfahren zur Feststellung der Rückverfolgbarkeit der Kalibrierung

Dispositifs photovoltaïques - Partie 4: Dispositifs photovoltaïques de référence - Procédures pour établir la traçabilité de l'étalonnage

IEC 60904-4:2019 est disponible sous forme de IEC 60904-4:2019 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.L’IEC 60904-4:2019 fixe les exigences relatives aux procédures d'étalonnage dans le but d'établir la traçabilité des dispositifs photovoltaïques (PV) de référence en unités SI, comme cela est exigé par l’IEC 60904-2. Le présent document s'applique aux dispositifs PV de référence utilisés pour mesurer l'éclairement énergétique de la lumière solaire naturelle ou simulée afin de quantifier les performances des dispositifs PV. L'utilisation d'un dispositif PV de référence est exigée dans de nombreuses normes relatives aux dispositifs PV (par exemple, l’IEC 60904-1 et l’IEC 60904-3). Le présent document a été rédigé en prenant en considération les dispositifs PV de référence à jonction unique, en particulier le silicium cristallin, mais il est suffisamment général pour inclure d’autres technologies à jonction unique. Cette deuxième édition annule et remplace la première édition parue en 2009. Cette édition inclut les modifications techniques majeures suivantes par rapport à l’édition précédente: - modification du titre de la norme; - incorporation de la référence de travail à la chaîne de traçabilité; - mise à jour de la WRR (world radiometric reference - référence radiométrique mondiale) par rapport au SI; - révision de toutes les méthodes et de leurs incertitudes à l’annexe: - harmonisation des symboles et formules avec les autres normes IEC.

Fotonapetostne naprave - 4. del: Referenčne sončne naprave - Postopki za vzpostavljanje sledljivosti kalibracije

Ta dokument določa zahteve za postopke vzpostavljanja sledljivosti kalibracije fotonapetostnih (PV) referenčnih naprav v enotah SI, kot zahteva standard IEC 60904-2. Dokument se uporablja za fotonapetostne referenčne naprave, ki se uporabljajo za merjenje obsevanja naravne ali simulirane sončne svetlobe z namenom količinske opredelitve učinkovitosti fotonapetostnih naprav. Uporaba fotonapetostne referenčne naprave je zahtevana v več standardih, ki zadevajo fotonapetostne naprave (npr. IEC 60904-1 in IEC 60904-3). Ta dokument je bil napisan predvsem za fotonapetostne naprave z enim spojem, zlasti za tiste s kristalno silicijevo celico, vendar je dovolj splošen, da se lahko uporablja tudi za druge tehnologije z enim spojem.

General Information

• Status: Published
• Publication Date: 19-Dec-2019
• Withdrawal Date: 16-Dec-2022
• ICS: 27.160 - Solar energy engineering
• Technical Committee: CLC/TC 82 - Solar photovoltaic energy systems
• Drafting Committee: IEC/TC 82 - IEC_TC_82
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 20-Dec-2019
• Completion Date: 20-Dec-2019
• Ref Project: SIST EN IEC 60904-4:2020 - Photovoltaic devices - Part 4: Reference solar devices - Procedures for establishing calibration traceability

Relations

• Replaces: EN 60904-4:2009 - Photovoltaic devices - Part 4: Reference solar devices - Procedures for establishing calibration traceability
• Effective Date: 24-Dec-2019
• Corrected By: EN IEC 60904-4:2019/AC:2020-10 - Photovoltaic devices - Part 4: Reference solar devices - Procedures for establishing calibration traceability
• Effective Date: 13-Oct-2020

Standards Content (Sample)

SLOVENSKI STANDARD
01-februar-2020
Nadomešča:
SIST EN 60904-4:2010
Fotonapetostne naprave - 4. del: Referenčne sončne naprave - Postopki za
vzpostavljanje sledljivosti kalibracije
Photovoltaic devices - Part 4: Reference solar devices - Procedures for establishing
calibration traceability
Photovoltaische Einrichtungen - Teil 4: Referenz-Solarelemente - Verfahren zur
Feststellung der Rückverfolgbarkeit der Kalibrierung
Dispositifs photovoltaïques - Partie 4: Dispositifs solaires de référence - Procédures pour
établir la traçabilité de l'étalonnage
Ta slovenski standard je istoveten z: EN IEC 60904-4:2019
ICS:
27.160 Sončna energija Solar energy engineering
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 60904-4

NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2019
ICS 27.160 Supersedes EN 60904-4:2009 and all of its amendments
and corrigenda (if any)
English Version
Photovoltaic devices - Part 4: Reference solar devices -
Procedures for establishing calibration traceability
(IEC 60904-4:2019)
Dispositifs photovoltaïques - Partie 4: Dispositifs Photovoltaische Einrichtungen - Teil 4: Referenz-
photovoltaïques de référence - Procédures pour établir la Solarelemente - Verfahren zur Feststellung der
traçabilité de l'étalonnage Rückverfolgbarkeit der Kalibrierung
(IEC 60904-4:2019) (IEC 60904-4:2019)
This European Standard was approved by CENELEC on 2019-12-17. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2019 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60904-4:2019 E

European foreword
The text of document 82/1618/FDIS, future edition 2 of IEC 60904-4, prepared by IEC/TC 82 "Solar
photovoltaic energy systems" was submitted to the IEC-CENELEC parallel vote and approved by
CENELEC as EN IEC 60904-4:2019.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2020-09-17
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2022-12-17
document have to be withdrawn
This document supersedes EN 60904-4:2009 and all of its amendments and corrigenda (if any).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.

Endorsement notice
The text of the International Standard IEC 60904-4:2019 was approved by CENELEC as a European
Standard without any modification.

Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments)
applies.
NOTE 1  Where an International Publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
NOTE 2  Up-to-date information on the latest versions of the European Standards listed in this annex is available here:
www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60904-1 -  Photovoltaic devices - Part 1: EN 60904-1 -
Measurement of photovoltaic current-
voltage characteristics
IEC 60904-2 -  Photovoltaic devices -- Part 2: - -
Requirements for reference solar cells
IEC 60904-3 -  Photovoltaic devices - Part 3: EN IEC 60904-3 -
Measurement principles for terrestrial
photovoltaic (PV) solar devices with
reference spectral irradiance data
IEC/TS 61836 -  Solar photovoltaic energy systems - - -
Terms, definitions and symbols
ISO/IEC Guide 98-3 2008 Uncertainty of measurement - Part 3: - -
Guide to the expression of uncertainty in
measurement (GUM:1995)
IEC 60904-4 ®
Edition 2.0 2019-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Photovoltaic devices –
Part 4: Photovoltaic reference devices – Procedures for establishing calibration

traceability
Dispositifs photovoltaïques –
Partie 4: Dispositifs photovoltaïques de référence – Procédures pour établir

la traçabilité de l'étalonnage

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 27.160 ISBN 978-2-8322-7531-3

– 2 – IEC 60904-4:2019 © IEC 2019
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Requirements for traceable calibration procedures of PV reference devices . 9
5 Uncertainty analysis . 9
6 Calibration report . 10
7 Marking . 10
Annex A (informative) Examples of validated calibration procedures . 11
A.1 General . 11
A.1.1 Overview . 11
A.1.2 Examples of validated methods . 11
A.1.3 List of common symbols . 11
A.1.4 Common formulae . 12
A.1.5 Reference documents . 13
A.2 Global sunlight method (GSM) . 13
A.2.1 General . 13
A.2.2 Equipment . 14
A.2.3 Measurements . 15
A.2.4 Data analysis . 15
A.2.5 Uncertainty estimates . 16
A.2.6 Reference documents . 17
A.3 Differential spectral responsivity calibration (DSR) . 17
A.3.1 General . 17
A.3.2 Equipment . 18
A.3.3 Test procedure . 18
A.3.4 Data analysis . 20
A.3.5 Uncertainty estimate . 20
A.3.6 Reference documents . 22
A.4 Solar simulator method (SSM) . 23
A.4.1 General . 23
A.4.2 Equipment . 23
A.4.3 Calibration procedure . 23
A.4.4 Data analysis . 24
A.4.5 Uncertainty estimate . 24
A.4.6 Reference documents . 25
A.5 Direct sunlight method (DSM) . 25
A.5.1 General . 25
A.5.2 Equipment . 26
A.5.3 Measurements . 26
A.5.4 Data analysis . 26
A.5.5 Uncertainty estimate . 27
A.5.6 Reference documents . 27
Bibliography . 28

IEC 60904-4:2019 © IEC 2019 – 3 –
Figure 1 – Schematic of most common reference instruments and transfer methods
used in the traceability chains for solar irradiance detectors . 9
Figure A.1 – Block diagram of differential spectral responsivity calibration
superimposing chopped monochromatic radiation DE(l) and DC bias radiation E . 21
b
Figure A.2 – Optical arrangement of differential spectral responsivity calibration . 22
Figure A.3 – Schematic apparatus of the solar simulator method . 25

Table 1 – Examples of reference instruments used in a traceability chain of solar
irradiance . 8
Table A.1 – Typical uncertainty components (k = 2) of global sunlight method . 17
Table A.2 – Uncertainty components (k = 2) of differential spectral responsivity
calibration method on PV reference devices . 21
Table A.3 – Example of uncertainty components (k = 2) of a solar simulator method

calibration . 24
Table A.4 – Typical uncertainty components (k = 2) of a solar simulator method
calibration when WRR traceable cavity radiometer is used. 24
Table A.5 – Typical uncertainty components (k = 2) of a direct sunlight method using
temperature dependent spectral correction factor (Formula (A.16)), without applying a
correction factor for the WRR to SI scale . 27

– 4 – IEC 60904-4:2019 © IEC 2019
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
PHOTOVOLTAIC DEVICES –
Part 4: Photovoltaic reference devices –
Procedures for establishing calibration traceability

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic f
...