EN 60904-2:2007

SLOVENSKI STANDARD
01-januar-2008
1DGRPHãþD
SIST EN 60904-2:2001
SIST EN 60904-2:2001/A1:2001
SIST EN 60904-6:2001
SIST EN 60904-6:2001/A1:2001
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Photovoltaic devices - Part 2: Requirements for reference solar devices
Photovoltaische Einrichtungen - Teil 2: Anforderungen an Referenz-Solarelemente
Dispositifs photovoltaiques - Partie 2: Exigences relatives aux dispositifs solaires de
référence
Ta slovenski standard je istoveten z: EN 60904-2:2007
ICS:
27.160 6RQþQDHQHUJLMD Solar energy engineering
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 60904-2
NORME EUROPÉENNE
June 2007
EUROPÄISCHE NORM
ICS 27.160 Supersedes EN 60904-2:1993 + A1:1998 and EN 60904-6:1994 + A1:1998

English version
Photovoltaic devices -
Part 2: Requirements for reference solar devices
(IEC 60904-2:2007)
Dispositifs photovoltaïques -  Photovoltaische Einrichtungen -
Partie 2: Exigences relatives aux Teil 2: Anforderungen an
dispositifs solaires de référence Referenz-Solarelemente
(CEI 60904-2:2007) (IEC 60904-2:2007)

This European Standard was approved by CENELEC on 2007-05-01. 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 Central Secretariat 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 Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the
Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2007 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60904-2:2007 E
Foreword
The text of document 82/425/CDV, future edition 2 of IEC 60904-2, prepared by IEC TC 82, Solar
photovoltaic energy systems, was submitted to the IEC-CENELEC parallel Unique Acceptance Procedure
and was approved by CENELEC as EN 60904-2 on 2007-05-01.
The main technical changes with regard to EN 60904-2:1993 are as follows:
– added subclause on “Calibration traceability”;
– added subclause on “Construction” to differentiate the various types of reference devices;
– added guidance on use of a built-in shunt resistor;
– increased data sheet requirements. In particular added requirement for either a mismatch correction or
an estimate of uncertainty due to the mismatch of the reference device;
– added Clause on “Calibration of working solar reference devices”.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2008-02-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2010-05-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 60904-2:2007 was approved by CENELEC as a European
Standard without any modification.
__________
- 3 - EN 60904-2:2007
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following referenced documents are indispensable for the application 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  When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year

1) 2)
IEC 60891 - Procedures for temperature and irradiance EN 60891 1994
corrections to measured I-V characteristics of
crystalline silicon photovoltaic devices

1) 2)
IEC 60904-1 - Photovoltaic devices - EN 60904-1 2006
Part 1: Measurement of photovoltaic current-
voltage characteristics
1) 2)
IEC 60904-5 - Photovoltaic devices - EN 60904-5 1995
Part 5: Determination of the equivalent cell
temperature (ECT) of photovoltaic (PV)
devices by the open-circuit voltage method

1) 2)
IEC 60904-7 - Photovoltaic devices - EN 60904-7 1998
Part 7: Computation of spectral mismatch
error introduced in the testing of a
photovoltaic device
1) 2)
IEC 60904-8 - Photovoltaic devices - EN 60904-8 1998
Part 8: Measurement of spectral response of
a photovoltaic (PV) device
1)
IEC 60904-9 - Photovoltaic devices - - -
Part 9: Solar simulator performance
requirements
1) 2)
IEC 60904-10 - Photovoltaic devices - EN 60904-10 1998
Part 10: Methods of linearity measurement

1) 2)
IEC 61215 - Crystalline silicon terrestrial photovoltaic EN 61215 2005
(PV) modules - Design qualification and type
approval
1) 2)
IEC 61646 - Thin-film terrestrial photovoltaic EN 61646 1997
(PV) modules - Design qualification and type
approval
1)
Undated reference.
2)
Valid edition at date of issue.

INTERNATIONAL IEC
STANDARD 60904-2
Second edition
2007-03
Photovoltaic devices –
Part 2:
Requirements for reference solar devices

© IEC 2007 Copyright - all rights reserved
No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical,
including photocopying and microfilm, without permission in writing from the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch Web: www.iec.ch
PRICE CODE
Commission Electrotechnique Internationale M
International Electrotechnical Commission
Международная Электротехническая Комиссия
For price, see current catalogue

60904-2 © IEC:2007 – 3 –
CONTENTS
FOREWORD.5

1 Scope and object.9
2 Normative references .9
3 Description .11
3.1 Calibration traceability.11
3.1.1 Primary reference device:.11
3.1.2 Secondary reference device: .11
3.1.3 Working reference device: .11
3.2 Construction of reference devices .11
3.2.1 Reference cell .11
3.2.2 Multi-cell reference devices .13
3.3 Built-in shunt resistors.13
4 Selection .15
4.1 Requirements, general .15
4.2 Additional requirements for reference modules.15
5 Temperature measurement.15
6 Electrical connections.15
7 Calibration.15
8 Data sheet.17
9 Marking .19
10 Packaging .19
10.1 Recommended packaging for use in natural sunlight .19
10.2 Recommended packaging for use under simulators .19
10.3 Single cell package .19
11 Care of reference devices.21
12 Calibration of secondary reference devices against a primary reference cell .21
12.1 Natural sunlight .21
12.2 Simulated sunlight.23
12.3 Test Procedure.23
13 Calibration of Working Solar Reference Device against a Secondary Solar
Reference Device .25

Figure 1 – Reference cell in a multi-cell package .25
Figure 2 – Single-cell package.25

60904-2 © IEC:2007 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
PHOTOVOLTAIC DEVICES –
Part 2: Requirements for reference solar devices

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 fields. To
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agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
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5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60904-2 has been prepared by IEC Technical Committee 82: Solar
photovoltaic energy systems.
This second edition cancels and replaces IEC 60904-2 (1989), its Amendment 1 (1998) and
IEC 60904-6 (1994) and its Amendment 1 (1998). It constitutes a technical revision.
The main technical changes with regard to the previous edition are as follows:
– Added subclause on “Calibration traceabi
...