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1 INTERNATIONAL STANDARD IEC Second edition Photovoltaic devices Part 2: Requirements for reference solar devices This English-language version is derived from the original bilingual publication by leaving out all French-language pages. Missing page numbers correspond to the Frenchlanguage pages. Reference number IEC :2007(E)
2 INTERNATIONAL STANDARD IEC Second edition 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: Telefax: Web: Commission Electrotechnique Internationale International Electrotechnical Commission Международная Электротехническая Комиссия PRICE CODE For price, see current catalogue M
3 IEC: CONTENTS FOREWORD Scope and object Normative references Description Calibration traceability Primary reference device: Secondary reference device: Working reference device: Construction of reference devices Reference cell Multi-cell reference devices Built-in shunt resistors Selection Requirements, general Additional requirements for reference modules Temperature measurement Electrical connections Calibration Data sheet Marking Packaging Recommended packaging for use in natural sunlight Recommended packaging for use under simulators Single cell package Care of reference devices Calibration of secondary reference devices against a primary reference cell Natural sunlight Simulated sunlight Test Procedure 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
4 IEC: 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 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 nongovernmental 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 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 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 has been prepared by IEC Technical Committee 82: Solar photovoltaic energy systems. This second edition cancels and replaces IEC (1989), its Amendment 1 (1998) and IEC (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 traceability. Added subclause on Construction to differentiate the various types of reference devices. Added guidance on use of a built-in shunt resistor.
5 IEC: 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 text of this standard is based on the following documents: CDV 82/425/CDV Report on voting 82/465/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. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. The committee has decided that the contents of this publication will remain unchanged until the maintenance result date indicated on the IEC web site under " in the data related to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended.
6 IEC: PHOTOVOLTAIC DEVICES Part 2: Requirements for reference solar devices 1 Scope and object This part of IEC gives requirements for the classification, selection, packaging, marking, calibration and care of reference solar devices. This standard covers solar reference devices used to determine the electrical performance of solar cells, modules and arrays under natural and simulated sunlight. It does not cover solar reference devices for use under concentrated sunlight. 2 Normative references 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. IEC 60891, Procedures for temperature and irradiance corrections to measured I-V characteristics of crystalline silicon photovoltaic devices IEC , Photovoltaic devices Part 1: Measurements of photovoltaic current-voltage characteristics IEC , Photovoltaic devices Part 5: Determination of the equivalent cell temperature (ECT) of photovoltaic (PV) devices by the open-circuit voltage method IEC , Photovoltaic devices Part 7: Computation of spectral mismatch error introduced in the testing of a photovoltaic device IEC , Photovoltaic devices Part 8: Measurement of spectral response of a photovoltaic (PV) device IEC , Photovoltaic devices Part 9: Solar simulator performance requirements IEC , Photovoltaic devices Part 10: Methods of linearity measurement IEC 61215, Crystalline silicon terrestrial photovoltaic (PV) modules Design qualification and type approval IEC 61646, Thin-film terrestrial photovoltaic (PV) modules Design qualification and type approval