IEC TS 61836:2016
(Main)Solar photovoltaic energy systems - Terms, definitions and symbols
Solar photovoltaic energy systems - Terms, definitions and symbols
IEC TS 61836:2016(E) deals with the terms, definitions and symbols from national and international solar photovoltaic standards and relevant documents used within the field of solar photovoltaic (PV) energy systems. It includes the terms, definitions and symbols compiled from the published IEC technical committee 82 standards. The main technical change with regard to the previous edition consists of adding / revising terms and definitions which have been discussed and agreed on during recent meetings of the TC 82 terminology working group.
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IEC TS 61836 ®
Edition 3.0 2016-12
TECHNICAL
SPECIFICATION
Solar photovoltaic energy systems – Terms, definitions and symbols
All rights reserved. Unless otherwise specified, 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
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.
IEC Central Office Tel.: +41 22 919 02 11
3, rue de Varembé Fax: +41 22 919 03 00
CH-1211 Geneva 20 info@iec.ch
Switzerland www.iec.ch
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.
IEC Catalogue - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
The stand-alone application for consulting the entire The world's leading online dictionary of electronic and
bibliographical information on IEC International Standards, electrical terms containing 20 000 terms and definitions in
Technical Specifications, Technical Reports and other English and French, with equivalent terms in 15 additional
documents. Available for PC, Mac OS, Android Tablets and languages. Also known as the International Electrotechnical
iPad. Vocabulary (IEV) online.
IEC publications search - www.iec.ch/searchpub IEC Glossary - std.iec.ch/glossary
The advanced search enables to find IEC publications by a 65 000 electrotechnical terminology entries in English and
variety of criteria (reference number, text, technical French extracted from the Terms and Definitions clause of
committee,…). It also gives information on projects, replaced IEC publications issued since 2002. Some entries have been
and withdrawn publications. collected from earlier publications of IEC TC 37, 77, 86 and
CISPR.
IEC Just Published - webstore.iec.ch/justpublished
Stay up to date on all new IEC publications. Just Published IEC Customer Service Centre - webstore.iec.ch/csc
details all new publications released. Available online and If you wish to give us your feedback on this publication or
also once a month by email. need further assistance, please contact the Customer Service
Centre: csc@iec.ch.
IEC TS 61836 ®
Edition 3.0 2016-12
TECHNICAL
SPECIFICATION
Solar photovoltaic energy systems – Terms, definitions and symbols
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 27.160 ISBN 978-2-8322-3762-5
– 2 – IEC TS 61836:2016 © IEC 2016
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms, definitions and symbols for solar photovoltaic energy systems . 6
3.1 Solar photovoltaic cells and modules . 6
3.2 Solar photovoltaic systems components . 19
3.3 Solar photovoltaic systems . 26
3.4 Solar photovoltaic system and component performance parameters . 38
3.5 Measurement devices . 58
3.6 Environmental parameters . 60
3.7 Quality and testing . 69
3.8 Concentrator photovoltaics . 74
3.9 Project management . 76
3.10 Miscellaneous . 77
4 Acronyms and abbreviations . 78
Bibliography . 80
Index of terms and symbols . 82
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SOLAR PHOTOVOLTAIC ENERGY SYSTEMS –
TERMS, DEFINITIONS AND SYMBOLS
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.
The main task of IEC technical committees is to prepare International Standards. In
exceptional circumstances, a technical committee may propose the publication of a technical
specification when
• the required support cannot be obtained for the publication of an International Standard,
despite repeated efforts, or
• the subject is still under technical development or where, for any other reason, there is the
future but no immediate possibility of an agreement on an International Standard.
Technical specifications are subject to review within three years of publication to decide
whether they can be transformed into International Standards.
IEC 61836, which is a technical specification, has been prepared by IEC technical committee
82: Solar photovoltaic energy systems.
This third edition cancels and replaces the second edition published in 2007. This edition
constitutes a technical revision.
– 4 – IEC TS 61836:2016 © IEC 2016
The main technical change with regard to the previous edition consists of adding / revising
terms and definitions which have been discussed and agreed on during recent TC 82 WG 1
meetings, more particularly at the WG 1 meeting in Pretoria in 2015-11.
The changes made in this new edition were kept limited deliberately, in order to avoid a long
development process and get the newest terms and definitions published as promptly as
possible, so that they can be used in the market place.
The text of this technical specification is based on the following documents:
Enquiry draft Report on voting
82/1117/DTS 82/1176/RVC
Full information on the voting for the approval of this technical specification can be found in
the report on voting indicated in the above table.
This document 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 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
• transformed into an International standard,
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
A bilingual edition of this document may be issued at a later date.
INTRODUCTION
Following the development of solar photovoltaic (PV) technology, specific Standards have
been prepared by IEC Technical Committee 82 since 1987. The terms and symbols used in
the PV industry necessitate a systematisation in order to have a consolidated glossary for
experts’ common understanding.
This Glossary lists the terms and symbols that the PV industry commonly uses. It is a living
document that will change as new terms and symbols are added. These have been
harmonized with IEC 60050 and other IEC documents as far as possible. All definitions not
included in this Technical Specification may be found elsewhere in other IEC documents.
NOTE 1 The terms "PV", "photovoltaic" and "solar photovoltaic" can be read and used interchangeably and
without the need for stating each term to show that each is applicable and commonly used by the solar photovoltaic
industry.
NOTE 2 All terms beginning with "solar photovoltaic" and "PV" are listed under their respective "photovoltaic"
names.
NOTE 3 The terms are listed alphabetically in ten categories. Under these categories, some of the terms have
been grouped into families of related meaning in order for the reader to readily see the differences between the
terms.
NOTE 4 This Glossary lists the precise usage of terms. Cross-references are provided to efficiently point the
reader to the location of definitions. For example, a "solar photovoltaic array" may also be referred to as
"photovoltaic array" or "array" when the reference to it is particularly clear. The definition for this term, for example,
occurs under the family heading of "photovoltaic" in the "Solar photovoltaic systems" section.
NOTE 5 The colloquial use of "solar" as the sole adjective of a noun is discouraged. For example, though "solar
array" may be commonly used in non-technical conversations, the precise terms are "solar photovoltaic array",
"photovoltaic array", and "array".
NOTE 6 Unless specifically noted otherwise, the terms "device", "cell", "module", "array", "sub-array", "field",
"component", "system", and "product" refer to items incorporating a photovoltaic device. As a result, each of these
terms can be understood to read as "PV device", "PV cell", "PV module", etc., without having to re-state the term
"PV" each time, though now and then it is useful to re-state "PV".
NOTE 7 The numeric quantities described by many of the terms can be expressed in any convenient unit of time
that the user may wish, such as day, month or year.
NOTE 8 "W " is not a recommended unit for rated power. For example for a 50 W module, the correct terminology
p
is "the rated power is 50 W", and not "the power is 50 W ".
p
NOTE 9 The documents from which these terms originated are shown in square brackets [ ]. Some adaptations
may have occurred.
NOTE 10 This Glossary document recognises the related IEC co-ordinating Technical Committees:
1 Terminology 77 Electromagnetic compatibility
21 Secondary cells and batteries 82 Solar photovoltaic energy systems
22 Power electronic systems and equipment 88 Wind energy generation systems
47 Semiconductor devices 105 Fuel cell technologies
64 Electrical installations and protection against 106 Methods for the assessment of electric,
electric shock magnetic and electromag
...
IEC TS 61836 ®
Edition 3.0 2016-12
TECHNICAL
SPECIFICATION
Solar photovoltaic energy systems – Terms, definitions and symbols
All rights reserved. Unless otherwise specified, 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
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.
IEC Central Office Tel.: +41 22 919 02 11
3, rue de Varembé Fax: +41 22 919 03 00
CH-1211 Geneva 20 info@iec.ch
Switzerland www.iec.ch
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.
IEC Catalogue - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
The stand-alone application for consulting the entire The world's leading online dictionary of electronic and
bibliographical information on IEC International Standards, electrical terms containing 20 000 terms and definitions in
Technical Specifications, Technical Reports and other English and French, with equivalent terms in 15 additional
documents. Available for PC, Mac OS, Android Tablets and languages. Also known as the International Electrotechnical
iPad. Vocabulary (IEV) online.
IEC publications search - www.iec.ch/searchpub IEC Glossary - std.iec.ch/glossary
The advanced search enables to find IEC publications by a 65 000 electrotechnical terminology entries in English and
variety of criteria (reference number, text, technical French extracted from the Terms and Definitions clause of
committee,…). It also gives information on projects, replaced IEC publications issued since 2002. Some entries have been
and withdrawn publications. collected from earlier publications of IEC TC 37, 77, 86 and
CISPR.
IEC Just Published - webstore.iec.ch/justpublished
Stay up to date on all new IEC publications. Just Published IEC Customer Service Centre - webstore.iec.ch/csc
details all new publications released. Available online and If you wish to give us your feedback on this publication or
also once a month by email. need further assistance, please contact the Customer Service
Centre: csc@iec.ch.
IEC TS 61836 ®
Edition 3.0 2016-12
TECHNICAL
SPECIFICATION
Solar photovoltaic energy systems – Terms, definitions and symbols
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 27.160 ISBN 978-2-8322-3762-5
– 2 – IEC TS 61836:2016 © IEC 2016
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms, definitions and symbols for solar photovoltaic energy systems . 6
3.1 Solar photovoltaic cells and modules . 6
3.2 Solar photovoltaic systems components . 19
3.3 Solar photovoltaic systems . 26
3.4 Solar photovoltaic system and component performance parameters . 38
3.5 Measurement devices . 58
3.6 Environmental parameters . 60
3.7 Quality and testing . 69
3.8 Concentrator photovoltaics . 74
3.9 Project management . 76
3.10 Miscellaneous . 77
4 Acronyms and abbreviations . 78
Bibliography . 80
Index of terms and symbols . 82
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SOLAR PHOTOVOLTAIC ENERGY SYSTEMS –
TERMS, DEFINITIONS AND SYMBOLS
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.
The main task of IEC technical committees is to prepare International Standards. In
exceptional circumstances, a technical committee may propose the publication of a technical
specification when
• the required support cannot be obtained for the publication of an International Standard,
despite repeated efforts, or
• the subject is still under technical development or where, for any other reason, there is the
future but no immediate possibility of an agreement on an International Standard.
Technical specifications are subject to review within three years of publication to decide
whether they can be transformed into International Standards.
IEC 61836, which is a technical specification, has been prepared by IEC technical committee
82: Solar photovoltaic energy systems.
This third edition cancels and replaces the second edition published in 2007. This edition
constitutes a technical revision.
– 4 – IEC TS 61836:2016 © IEC 2016
The main technical change with regard to the previous edition consists of adding / revising
terms and definitions which have been discussed and agreed on during recent TC 82 WG 1
meetings, more particularly at the WG 1 meeting in Pretoria in 2015-11.
The changes made in this new edition were kept limited deliberately, in order to avoid a long
development process and get the newest terms and definitions published as promptly as
possible, so that they can be used in the market place.
The text of this technical specification is based on the following documents:
Enquiry draft Report on voting
82/1117/DTS 82/1176/RVC
Full information on the voting for the approval of this technical specification can be found in
the report on voting indicated in the above table.
This document 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 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
• transformed into an International standard,
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
A bilingual edition of this document may be issued at a later date.
INTRODUCTION
Following the development of solar photovoltaic (PV) technology, specific Standards have
been prepared by IEC Technical Committee 82 since 1987. The terms and symbols used in
the PV industry necessitate a systematisation in order to have a consolidated glossary for
experts’ common understanding.
This Glossary lists the terms and symbols that the PV industry commonly uses. It is a living
document that will change as new terms and symbols are added. These have been
harmonized with IEC 60050 and other IEC documents as far as possible. All definitions not
included in this Technical Specification may be found elsewhere in other IEC documents.
NOTE 1 The terms "PV", "photovoltaic" and "solar photovoltaic" can be read and used interchangeably and
without the need for stating each term to show that each is applicable and commonly used by the solar photovoltaic
industry.
NOTE 2 All terms beginning with "solar photovoltaic" and "PV" are listed under their respective "photovoltaic"
names.
NOTE 3 The terms are listed alphabetically in ten categories. Under these categories, some of the terms have
been grouped into families of related meaning in order for the reader to readily see the differences between the
terms.
NOTE 4 This Glossary lists the precise usage of terms. Cross-references are provided to efficiently point the
reader to the location of definitions. For example, a "solar photovoltaic array" may also be referred to as
"photovoltaic array" or "array" when the reference to it is particularly clear. The definition for this term, for example,
occurs under the family heading of "photovoltaic" in the "Solar photovoltaic systems" section.
NOTE 5 The colloquial use of "solar" as the sole adjective of a noun is discouraged. For example, though "solar
array" may be commonly used in non-technical conversations, the precise terms are "solar photovoltaic array",
"photovoltaic array", and "array".
NOTE 6 Unless specifically noted otherwise, the terms "device", "cell", "module", "array", "sub-array", "field",
"component", "system", and "product" refer to items incorporating a photovoltaic device. As a result, each of these
terms can be understood to read as "PV device", "PV cell", "PV module", etc., without having to re-state the term
"PV" each time, though now and then it is useful to re-state "PV".
NOTE 7 The numeric quantities described by many of the terms can be expressed in any convenient unit of time
that the user may wish, such as day, month or year.
NOTE 8 "W " is not a recommended unit for rated power. For example for a 50 W module, the correct terminology
p
is "the rated power is 50 W", and not "the power is 50 W ".
p
NOTE 9 The documents from which these terms originated are shown in square brackets [ ]. Some adaptations
may have occurred.
NOTE 10 This Glossary document recognises the related IEC co-ordinating Technical Committees:
1 Terminology 77 Electromagnetic compatibility
21 Secondary cells and batteries 82 Solar photovoltaic energy systems
22 Power electronic systems and equipment 88 Wind energy generation systems
47 Semiconductor devices 105 Fuel cell technologies
64 Electrical installations and protection against 106 Methods for the assessment of electric,
electric shock magnetic and electromag
...
IEC TS 61836 ®
Edition 3.0 2016-12
REDLINE VERSION
TECHNICAL
SPECIFICATION
colour
inside
Solar photovoltaic energy systems – Terms, definitions and symbols
All rights reserved. Unless otherwise specified, 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
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.
IEC Central Office Tel.: +41 22 919 02 11
3, rue de Varembé Fax: +41 22 919 03 00
CH-1211 Geneva 20 info@iec.ch
Switzerland www.iec.ch
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.
IEC Catalogue - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
The stand-alone application for consulting the entire The world's leading online dictionary of electronic and
bibliographical information on IEC International Standards, electrical terms containing 20 000 terms and definitions in
Technical Specifications, Technical Reports and other English and French, with equivalent terms in 15 additional
documents. Available for PC, Mac OS, Android Tablets and languages. Also known as the International Electrotechnical
iPad. Vocabulary (IEV) online.
IEC publications search - www.iec.ch/searchpub IEC Glossary - std.iec.ch/glossary
The advanced search enables to find IEC publications by a 65 000 electrotechnical terminology entries in English and
variety of criteria (reference number, text, technical French extracted from the Terms and Definitions clause of
committee,…). It also gives information on projects, replaced IEC publications issued since 2002. Some entries have been
and withdrawn publications. collected from earlier publications of IEC TC 37, 77, 86 and
CISPR.
IEC Just Published - webstore.iec.ch/justpublished
Stay up to date on all new IEC publications. Just Published IEC Customer Service Centre - webstore.iec.ch/csc
details all new publications released. Available online and If you wish to give us your feedback on this publication or
also once a month by email. need further assistance, please contact the Customer Service
Centre: csc@iec.ch.
IEC TS 61836 ®
Edition 3.0 2016-12
REDLINE VERSION
TECHNICAL
SPECIFICATION
colour
inside
Solar photovoltaic energy systems – Terms, definitions and symbols
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 27.160 ISBN 978-2-8322-3716-8
– 2 – IEC TS 61836:2016 RLV © IEC 2016
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope and object . 6
2 Normative references . 6
3 Glossary of Terms, definitions and symbols for solar photovoltaic energy systems . 6
3.1 Solar photovoltaic cells and modules . 6
3.2 Solar photovoltaic systems components . 19
3.3 Solar photovoltaic systems . 26
3.4 Solar photovoltaic system and component performance parameters . 39
3.5 Measurement devices . 59
3.6 Environmental parameters . 61
3.7 Quality and testing . 70
3.8 Concentrator photovoltaics . 75
3.9 Project management . 77
3.10 Miscellaneous . 78
4 Acronyms and abbreviations . 79
Bibliography . 81
Index of terms and symbols . 84
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SOLAR PHOTOVOLTAIC ENERGY SYSTEMS –
TERMS, DEFINITIONS AND SYMBOLS
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.
This redline version of the official IEC Standard allows the user to identify the changes
made to the previous edition. A vertical bar appears in the margin wherever a change
has been made. Additions are in green text, deletions are in strikethrough red text.
– 4 – IEC TS 61836:2016 RLV © IEC 2016
The main task of IEC technical committees is to prepare International Standards. In
exceptional circumstances, a technical committee may propose the publication of a technical
specification when
• the required support cannot be obtained for the publication of an International Standard,
despite repeated efforts, or
• the subject is still under technical development or where, for any other reason, there is the
future but no immediate possibility of an agreement on an International Standard.
Technical specifications are subject to review within three years of publication to decide
whether they can be transformed into International Standards.
IEC 61836, which is a technical specification, has been prepared by IEC technical committee
82: Solar photovoltaic energy systems.
This third edition cancels and replaces the second edition published in 2007. This edition
constitutes a technical revision.
The main technical change with regard to the previous edition consists of adding / revising
terms and definitions which have been discussed and agreed on during recent TC 82 WG 1
meetings, more particularly at the WG 1 meeting in Pretoria in 2015-11.
The changes made in this new edition were kept limited deliberately, in order to avoid a long
development process and get the newest terms and definitions published as promptly as
possible, so that they can be used in the market place.
The text of this technical specification is based on the following documents:
Enquiry draft Report on voting
82/1117/DTS 82/1176/RVC
Full information on the voting for the approval of this technical specification can be found in
the report on voting indicated in the above table.
This document 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 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
• transformed into an International standard,
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
A bilingual edition of this document may be issued at a later date.
IMPORTANT – The “colour inside” logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct understanding
of its contents. Users should therefore print this publication using a colour printer.
INTRODUCTION
Following the development of solar photovoltaic (PV) technology, specific Standards have
been prepared by IEC Technical Committee 82 since 1987. The terms and symbols used in
the PV industry necessitate a systematisation in order to have a consolidated glossary for
experts’ common understanding.
This Glossary lists the terms and symbols that the PV industry commonly uses. It is a living
document that will change as new terms and symbols are added. These have been
harmonized with IEC 60050 and other IEC documents as far as possible. All definitions not
included in this Technical Specification may be found elsewhere in other IEC documents.
NOTE 1 The terms "PV", "photovoltaic" and "solar photovoltaic" can be read and used interchangeably and
without the need for stating each term to show that each is applicable and commonly used by the solar photovoltaic
industry.
NOTE 2 All terms beginning with "solar photovoltaic" and "PV" are listed under their respective "photovoltaic"
names.
NOTE 3 The terms are listed alphabetically in ten categories. Under these categories, some of the terms have
been grouped into families of related meaning in order for the reader to readily see the differences between the
terms.
NOTE 4 This Glossary lists the precise usage of terms. Cross-references are provided to efficiently point the
reader to the location of definitions. For example, a "solar photovoltaic array" may also be referred to as
"photovoltaic array" or "array" when the reference to it is particularly clear. The definition for this term, for example,
occurs under the family heading of "photovoltaic" in the "Solar photovoltaic systems" section.
NOTE 5 The colloquial use of "solar" as the sole adjective of a noun is discouraged. For example, though "solar
array" may be commonly used in non-technical conversations, the precise terms are "solar photovoltaic array",
"photovoltaic array", and "array".
NOTE 6 Unless specifically noted otherwise, the terms "device", "cell", "module", "array", "sub-array", "field",
"component", "system", and "product" refer to items incorporating a photovoltaic device. As a result, each of these
terms can be understood to read as "PV device", "PV cell", "PV module", etc., without having to re-state the term
"PV" each time, though now and then it is useful to re-state "PV".
NOTE 7 The numeric quantities described by many of the terms can be expressed in any convenient unit of time
that the user may wish, such as day, month or year.
NOTE 8 "W " is not a recommended unit for rated power. For example for a 50 W module, the correct terminology
p
is "the rated power is 50 W", and not "the power is 50 W ".
p
...
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