SIST EN 60904-5:2011

Photovoltaic devices - Part 5: Determination of the equivalent cell temperature (ECT) of photovoltaic (PV) devices by the open-circuit voltage method

This part of IEC 60904 describes the preferred method for determining the equivalent cell temperature (ECT) of PV devices (cells, modules and arrays of one type of module), for the purposes of comparing their thermal characteristics, determining NOCT (nominal operating cell temperature) and translating measured I-V characteristics to other temperatures.
This standard applies to linear devices with logarithmic VOC dependence on irradiance and in stable conditions. It may be used for all technologies but one has to verify that there is no preconditioning effect influencing the measurement.

Photovoltaische Einrichtungen - Teil 5: Bestimmung der gleichwertigen Zellentemperatur von photovoltaischen (PV) Betriebsmitteln nach dem Leerlaufspannungs-Verfahren

Dispositifs photovoltaïques - Partie 5: Détermination de la température de cellule équivalente (ECT) des dispositifs photovoltaïques (PV) par la méthode de la tension en circuit ouvert

La CEI 60904-5:2011 décrit la méthode préférentielle pour déterminer la température de cellule équivalente (ECT) des dispositifs photovoltaïques (cellules, modules et champs d'un type de module), dans les buts de comparer leurs caractéristiques thermiques, de déterminer leur NOCT (température nominale d'utilisation des cellules) et de transposer les caractéristiques I-V mesurées à d'autres températures que celles de leur mesure. Les principaux changements techniques par rapport à l'édition précédente sont les suivants:  - ajout d'une méthode explicitant comment extraire les paramètres d'entrée;  - réécriture de la méthode explicitant comment calculer ECT;  - travail sur les formules pour qu'elles soient cohérentes avec la  CEI 60891.

Fotonapetostne naprave - 5. del: Določanje ekvivalentne temperature celice (ECT) fotonapetostnih (PV) naprav po metodi napetosti odprtih sponk (IEC 60904-5:2011)

Ta del IEC 60904 opisuje prednostno metodo za določanje ekvivalentne temperature celic (ECT) fotonapetostnih (PV) naprav (celic, modulov in nizov modulov ene vrste) za namen primerjave njihovih termičnih značilnosti, ugotavljanje NOCT (nazivne delovne temperature celic) in prevajanje izmerjenih značilnosti I-V v druge temperature.
Ta standard velja za linerane naprave z logaritemsko odvisnostjo VOC od sevanja in za stabilne pogoje. Lahko se uporablja pri vseh tehnologijah, vendar je treba preveriti, da ni učinka kondicioniranja, ki bi vplival na meritev.

General Information

• Status: Published
• Publication Date: 11-May-2011
• ICS: 27.160 - Solar energy engineering
• Technical Committee: PVS - Solar photovoltaic energy systems
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 04-May-2011
• Due Date: 09-Jul-2011
• Completion Date: 12-May-2011
• Ref Project: EN 60904-5:2011 - Photovoltaic devices - Part 5: Determination of the equivalent cell temperature (ECT) of photovoltaic (PV) devices by the open-circuit voltage method

Relations

• Replaces: SIST EN 60904-5:2001 - Photovoltaic devices -- Part 5: Determination of the equivalent cell temperature (ECT) of photovoltaic (PV) devices by the open-circuit voltage method
• Effective Date: 01-Jun-2011
• Revised: SIST EN 60904-5:2001 - Photovoltaic devices -- Part 5: Determination of the equivalent cell temperature (ECT) of photovoltaic (PV) devices by the open-circuit voltage method
• Effective Date: 25-Mar-2014
• Replaces: SIST EN 60904-5:2001 - Photovoltaic devices -- Part 5: Determination of the equivalent cell temperature (ECT) of photovoltaic (PV) devices by the open-circuit voltage method
• Effective Date: 28-Jan-2023
• Amended By: SIST EN 60904-5:2011/A1:2023 - Photovoltaic devices - Part 5: Determination of the equivalent cell temperature (ECT) of photovoltaic (PV) devices by the open-circuit voltage method
• Effective Date: 01-May-2023

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 60904-5:2011
01-junij-2011
1DGRPHãþD
SIST EN 60904-5:2001
)RWRQDSHWRVWQHQDSUDYHGHO'RORþDQMHHNYLYDOHQWQHWHPSHUDWXUHFHOLFH(&7
IRWRQDSHWRVWQLK39QDSUDYSRPHWRGLQDSHWRVWLRGSUWLKVSRQN,(&
Photovoltaic devices - Part 5: Determination of the equivalent cell temperature (ECT) of
photovoltaic (PV) devices by the open-circuit voltage method
Photovoltaische Einrichtungen - Teil 5: Bestimmung der gleichwertigen Zellentemperatur
von photovoltaischen (PV) Betriebsmitteln nach dem Leerlaufspannungs-Verfahren
Dispositifs photovoltaïques - Partie 5: Détermination de la température de cellule
équivalente (ECT) des dispositifs photovoltaïques (PV) par la méthode de la tension en
circuit ouvert
Ta slovenski standard je istoveten z: EN 60904-5:2011
ICS:
27.160 6RQþQDHQHUJLMD Solar energy engineering
SIST EN 60904-5:2011 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 60904-5:2011

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SIST EN 60904-5:2011

EUROPEAN STANDARD
EN 60904-5

NORME EUROPÉENNE
April 2011
EUROPÄISCHE NORM

ICS 27.160 Supersedes EN 60904-5:1995


English version


Photovoltaic devices -
Part 5: Determination of the equivalent cell temperature (ECT) of
photovoltaic (PV) devices by the open-circuit voltage method
(IEC 60904-5:2011)


Dispositifs photovoltaïques -  Photovoltaische Einrichtungen -
Partie 5: Détermination de la température Teil 5: Bestimmung der gleichwertigen
de cellule équivalente (ECT) des Zellentemperatur von photovoltaischen
dispositifs photovoltaïques (PV) par la (PV) Betriebsmitteln nach dem
méthode de la tension en circuit ouvert Leerlaufspannungs-Verfahren
(CEI 60904-5:2011) (IEC 60904-5:2011)




This European Standard was approved by CENELEC on 2011-03-24. 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, Croatia, 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

Management Centre: Avenue Marnix 17, B - 1000 Brussels


© 2011 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60904-5:2011 E

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SIST EN 60904-5:2011
EN 60904-5:2011 - 2 -
Foreword
The text of document 82/595/CDV, future edition 2 of IEC 60904-5, prepared by IEC TC 82, Solar
photovoltaic energy systems, was submitted to the IEC-CENELEC parallel vote and was approved by
CENELEC as EN 60904-5 on 2011-03-24.
This European Standard supersedes EN 60904-5:1995.
The main technical changes with regard to EN 60904-5:1995 are as follows:
— added and updated normative references;
— added reporting section;
— added method on how to extract the input parameters;
— rewritten method on how to calculate ECT;
— reworked formulae to be in line with EN 60891.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent
rights.
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) 2011-12-24
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2014-03-24
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 60904-5:2011 was approved by CENELEC as a European
Standard without any modification.
__________

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SIST EN 60904-5:2011
- 3 - EN 60904-5:2011
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

IEC 60891 - Photovoltaic devices - Procedures for EN 60891 -
temperature and irradiance corrections to
measured I-V characteristics


IEC 60904-1 - Photovoltaic devices - EN 60904-1 -
Part 1: Measurement of photovoltaic current-
voltage characteristics


IEC 60904-2 - Photovoltaic devices - EN 60904-2 -
Part 2: Requirements for reference solar
devices


IEC 60904-7 - Photovoltaic devices - EN 60904-7 -
Part 7: Computation of the spectral mismatch
correction for measurements of photovoltaic
devices


IEC 60904-10 - Photovoltaic devices - EN 60904-10 -
Part 10: Methods of linearity measurement


IEC 61215 - Crystalline silicon terrestrial photovoltaic EN 61215 -
(PV) modules - Design qualification and type
approval


IEC 61829 - Crystalline silicon photovoltaic (PV) array - EN 61829 -
On-site measurement of I-V characteristics


ISO/IEC 17025 - General requirements for the competence EN ISO/IEC 17025 -
of testing and calibration laboratories

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SIST EN 60904-5:2011

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SIST EN 60904-5:2011
IEC 60904-5
®

Edition 2.0 2011-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE


Photovoltaic devices –
Part 5: Determination of the equivalent cell temperature (ECT) of photovoltaic
(PV) devices by the open-circuit voltage method

Dispositifs photovoltaïques –
Partie 5: Détermination de la température de cellule équivalente (ECT) des
dispositifs photovoltaïques (PV) par la méthode de la tension en circuit ouvert

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX K
ICS 27.160 ISBN 978-2-88912-366-7

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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SIST EN 60904-5:2011
– 2 – 60904-5  IEC:2011
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope and object . 6
2 Normative references . 6
3 Measurement principle and requirements . 6
3.1 Principle . 6
3.2 General measurement requirements . 7
4 Apparatus . 7
5 Determination of required input parameters . 7
6 Procedure . 8
6.1 General . 8
6.2 Operating in a controlled environment . 8
6.3 Taking measurements under arbitrary irradiance conditions . 8
7 Calculation of equivalent cell temperature . 8
8 Test report. 9

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SIST EN 60904-5:2011
60904-5  IEC:2011 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

PHOTOVOLTAIC DEVICES –

Part 5: Determination of the equivalent cell temperature (ECT)
of photovoltaic (PV) devices by the open-circuit voltage method


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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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
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3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
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4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
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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 60904-5 has been prepared by IEC technical committee 82: Solar
photovoltaic energy systems.
This second edition cancels and replaces the first edition, issued in 1993, and constitutes a
technical revision.
The main technical changes with regard to the previous edition are as follows:
• added and updated normative references;
• added reporting section;
• added method on how to extract the input parameters;
• rewritten method on how to calculate ECT;
• reworked formulae to be in line with IEC 60891.

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SIST EN 60904-5:2011
– 4 – 60904-5  IEC:2011
The text of this standard is based on the following documents:
CDV Report on voting
82/595/CDV 82/626/RVC

Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
A list of all parts
...