EN 60904-2:2015

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Dispositifs photovoltaïques -- Partie 2: Exigences relatives aux dispositifs solaires de référencePhotovoltaic devices - Part 2: Requirements for reference solar devices27.160Solar energy engineeringICS:Ta slovenski standard je istoveten z:EN 60904-2:2015SIST EN 60904-2:2015en01-maj-2015SIST EN 60904-2:2015SLOVENSKI
STANDARDSIST EN 60904-2:20081DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 60904-2
March 2015 ICS 27.160
Supersedes
EN 60904-2:2007
English Version
Photovoltaic devices -
Part 2: Requirements for photovoltaic reference devices (IEC 60904-2:2015)
Dispositifs photovoltaïques -
Partie 2: Exigences applicables aux dispositifs photovoltaïques de référence (IEC 60904-2:2015)
Photovoltaische Einrichtungen -
Teil 2: Anforderungen an Referenz-Solarelemente (IEC 60904-2:2015) This European Standard was approved by CENELEC on 2015-02-27. 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, 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: Avenue Marnix 17,
B-1000 Brussels © 2015 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 60904-2:2015 E SIST EN 60904-2:2015

This document supersedes EN 60904-2:2007. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such patent rights. Endorsement notice The text of the International Standard IEC 60904-2:2015 was approved by CENELEC as a European Standard without any modification. SIST EN 60904-2:2015

- 3 - EN 60904-2:2015 Annex ZA (normative)
Normative references to international publications with their corresponding European publications The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. NOTE 1 When 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 60891 -
Photovoltaic devices - Procedures for temperature and irradiance corrections to measured I-V characteristics EN 60891 -
IEC 60904-1 -
Photovoltaic devices --
Part 1: Measurement of photovoltaic current-voltage characteristics EN 60904-1 -
IEC 60904-3 -
Photovoltaic devices -
Part 3: Measurement principles for terrestrial photovoltaic (PV) solar devices with reference spectral irradiance data EN 60904-3 -
IEC 60904-4 -
Photovoltaic devices -
Part 4: Reference solar devices - Procedures for establishing calibration traceability EN 60904-4 -
IEC 60904-5 -
Photovoltaic devices --
Part 5: Determination of the equivalent cell temperature (ECT) of photovoltaic (PV) devices by the open-circuit voltage method EN 60904-5 -
IEC 60904-7 -
Photovoltaic devices --
Part 7: Computation of the spectral mismatch correction for measurements of photovoltaic devices EN 60904-7 -
IEC 60904-8 -
Photovoltaic devices --
Part 8: Measurement of spectral response of a photovoltaic (PV) device EN 60904-8 -
IEC 60904-9 -
Photovoltaic devices --
Part 9: Solar simulator performance requirements EN 60904-9 -
IEC 60904-10 -
Photovoltaic devices --
Part 10: Methods of linearity measurement EN 60904-10 -
IEC/TS 61836 -
Solar photovoltaic energy systems - Terms, definitions and symbols CLC/TS 61836 -
IEC 60904-2 Edition 3.0 2015-01 INTERNATIONAL STANDARD NORME INTERNATIONALE Photovoltaic devices –
Part 2: Requirements for photovoltaic reference devices
Dispositifs photovoltaïques –
Partie 2: Exigences applicables aux dispositifs photovoltaïques de référence
INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE
ICS 27.160
ISBN 978-2-8322-2184-6
– 2 – IEC 60904-2:2015  IEC 2015 CONTENTS FOREWORD . 3 1 Scope . 5 2 Normative references. 5 3 Terms and definitions . 5 4 Selection of reference device . 7 4.1 General requirements . 7 4.2 Additional requirements for single reference cell in a multi-cell package . 8 4.3 Additional requirements for reference modules . 8 4.4 Requirements for built-in shunt resistors . 8 5 Temperature measurement . 9 6 Electrical connections . 9 7 Calibration . 9 8 Report . 10 9 Marking . 11 10 Packaging . 11 10.1 Recommended packaging for use in natural sunlight . 11 10.2 Recommended packaging for use under solar simulators . 11 10.3 Single cell package . 11 11 Care of reference devices . 12 12 Calibration of secondary reference devices against a primary reference cell . 12 12.1 General . 12 12.2 Natural sunlight . 12 12.3 Simulated sunlight . 13 12.4 Test procedure . 13 13 Calibration of working reference device against a secondary reference device . 14 Bibliography . 15
Figure 1 – Single-cell package . 6 Figure 2 – Single reference cell in a multi-cell package . 8
IEC 60904-2:2015  IEC 2015 – 3 – INTERNATIONAL ELECTROTECHNICAL COMMISSION ____________
PHOTOVOLTAIC DEVICES –
Part 2: Requirements for photovoltaic reference 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 this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non-governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by 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 transparently to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any services carried out by independent certification bodies. 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 expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications.
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 third edition cancels and replaces the second edition, published in 2007. It constitutes a technical revision. The main technical changes with regard to the previous edition are as follows: – addition of a test procedure in simulated sunlight of subsequent measurement of primary and secondary reference device; – definition of standard test conditions; – reduction of allowed diffuse component for secondary reference cell calibration to 20 %. SIST EN 60904-2:2015

– 4 – IEC 60904-2:2015  IEC 2015 The text of this standard is based on the following documents: FDIS Report on voting 82/893/FDIS 82/918/RVD
Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. A list of all parts in the IEC 60904 series, published under the general title Photovoltaic devices, can be found on the IEC website. The committee has decided that the contents of this publication will remain unchanged until the stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to the specific publication. At this date, the publication will be • reconfirmed, • withdrawn, • replaced by a revised edition, or • amended.
IEC 60904-2:2015  IEC 2015 – 5 – PHOTOVOLTAIC DEVICES –
Part 2: Requirements for photovoltaic reference devices
1 Scope This part of IEC 60904 gives requirements for the classification, selection, packaging, marking, calibration and care of photovoltaic reference devices. This standard covers photovoltaic reference devices used to determine the electrical performance of photovoltaic cells, modules and arrays under natural and simulated sunlight. It does not cover photovoltaic reference devices for use under concentrated sunlight. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60891, Photovoltaic devices – Procedures for temperature and irradiance corrections to measured I-V characteristics IEC 60904-1, Photovoltaic devices – Part 1: Measurements of photovoltaic current-voltage characteristics IEC 60904-3, Photovoltaic devices – Part 3: Measurement principles for terrestrial photovoltaic (PV) solar devices with reference spectral irradiance data IEC 60904-4, Photovoltaic devices – Part 4: Reference solar devices – Procedures for establishing calibration traceability IEC 60904-5, Photovoltaic devices – Part 5: Determination of the equivalent cell temperature (ECT) of photovoltaic (PV) devices by the open-circuit voltage method IEC 60904-7, Photovoltaic devices – Part 7: Computation of the spectral mismatch correction for measurements of photovoltaic devices IEC 60904-8, Photovoltaic devices – Part 8: Measurement of spectral responsivity of a photovoltaic (PV) device IEC 60904-9, Photovoltaic devices – Part 9: Solar simulator performance requirements IEC 60904-10, Photovoltaic devices – Part 10: Methods of linearity measurement IEC TS 61836, Solar photovoltaic energy systems – Terms, definitions and symbols 3 Terms and definitions For the purposes of this document, the terms and definitions given in IEC TS 61836 and the following apply. SIST EN 60904-2:2015

– 6 – IEC 60904-2:2015  IEC 2015 3.1
calibration traceability traceability as defined in IEC 60904-4 Note 1 to entry: Photovoltaic reference devices are distinguished by their position in a chain of calibration traceability. 3.2
primary reference device photovoltaic reference device whose calibration is based on a radiometer or standard detector or standard light source traceable to SI units as defined in IEC 60904-4 3.3
secondary reference device photovoltaic reference device calibrated in natural or simulated sunlight against a primary reference device 3.4
working reference device photovoltaic reference device calibrated in natural or simulated sunlight against a secondary reference device 3.5
reference devices specially calibrated photovoltaic devices which are used to measure natural or simulated irradiance or to set simulator irradiance levels for measuring the performance of other photovoltaic devices 3.6
reference cell single photovoltaic cell used primarily for transfer of calibration values Note 1 to entry: For practical reasons, such cells are small in surface area, and are usually mounted on a fixture which ensures reproducibility in mounting, thermal control and electrical connections. A typical sample is sketched in Figure 1.
Figure 1 – Single-cell package 3.6.1
reference cell with protective cover but without encapsulant photovoltaic reference cell similar to 3.6, but provided with a protective cover Window receptacle Solar cell cavity Wiring space Cable clamp Voltage and current leads Field of view not less than 160° IEC SIST EN 60904-2:2015

IEC 60904-2:2015  IEC 2015 – 7 – Note 1 to entry: Recommended use: as a laboratory primary, secondary and working reference, in particular when measuring the performance of other photovoltaic devices using solar simulators or natural sunlight with direct beam only. 3.6.2
encapsulated reference cell photovoltaic reference cell similar to 3.6, but encapsulated in a protective assembly so as to withstand short-term outdoor exposure
Note 1 to entry: Recommended use: as a laboratory primary, secondary and working reference, in particular when measurements of the performance of other photovoltaic devices under natural sunlight are performed.
Note 2 to entry: If the encapsulation system has been demonstrated to withstand long-term outdoor exposure, applying test levels according to IEC 61215, such reference cells may also be suitable to be used as a monitoring device for long-term assessment of operational photovoltaic arrays. 3.7
multi-cell reference devices photovoltaic device consisting of several photovoltaic cells Note 1 to entry: Recommended use: as the diffuse component of natural sunlight and non-normal incidence of simulated sunlight interact with encapsulants and back sheets of a module and influence the amount of irradiance which a particular cell receives, it is recommended that reference devices used for measuring sub-assemblies of modules and arrays be encapsulated in a multi-cell package, matching the mechanical and optical features of the test specimen (module, sub-assemblies of modules, arrays) so as to respond to variations in the geometrical distribution of the incident radiation in the same way as the test specimen.
3.8
single reference cell in a multi-cell package single photovoltaic cell mounted in such a package that frame, encapsulation system, shape, size and spacing of the cells surrounding it are the same as in the module to be tested Note 1 to entry: The surrounding cells may be real or dummies that have the same optical properties. 3.9
reference module photovoltaic module consisting of the encapsulation of a series and/or parallel connection of photovoltaic cells Note 1 to entry: Recommended use: for measuring other modules in order to achieve correspondence of dimensions, mechanical construction, optical properties and electrical circuitry of the reference module and test module, so as to minimize discrepancies due to simulator non-uniformity, internal reflections or temperature distribution. 3.10 built-in shunt resistors resistor connected across the output terminals of photovoltaic devices Note 1 to entry: The resi
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