Concentrator photovoltaic (CPV) modules and assemblies - Design qualification and type approval

This International Standard specifies the minimum requirements for the design qualification and type approval of concentrator photovoltaic (CPV) modules and assemblies suitable for long-term operation in general open-air climates as defined in IEC 60721-2-1. The test sequence is partially based on that specified in IEC 61215-1 for the design qualification and type approval of flat-plate terrestrial crystalline silicon PV modules. However, some changes have been made to account for the special features of CPV receivers and modules, particularly with regard to the separation of on-site and in-lab tests, effects of tracking alignment, high current density, and rapid temperature changes, which have resulted in the formulation of some new test procedures or new requirements.
The object of this test standard is to determine the electrical, mechanical, and thermal characteristics of the CPV modules and assemblies and to show, as far as possible within reasonable constraints of cost and time, that the CPV modules and assemblies are capable of withstanding prolonged exposure in climates described in the scope. The actual life of CPV modules and assemblies so qualified will depend on their design, production, environment, and the conditions under which they are operated.
This standard shall be used in conjunction with the retest guidelines described in Annex B.

Konzentrator-Photovoltaik(CPV)-Module und -Anordnungen - Bauarteignung und Bauartzulassung

Modules et ensembles photovoltaïques à concentration - Qualification de la conception et homologation

IEC 62108:2022 est disponible sous forme de IEC 62108:2022 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.L'IEC 62108:2022 spécifie les exigences minimales relatives à la qualification de la conception et l'homologation des modules et ensembles photovoltaïques à concentration (CPV - concentrator photovoltaic) pour une utilisation de longue durée dans les climats généraux d'air libre, comme cela est défini dans l'IEC 60721-2-1. Le présent document d'essai a pour objet de déterminer les caractéristiques électriques, mécaniques et thermiques des modules et ensembles CPV et de montrer, autant que possible avec des contraintes de coût et de temps raisonnables, que les modules et ensembles CPV peuvent supporter une exposition prolongée aux climats définis dans le domaine d'application.

Koncentratorski fotonapetostni (CPV) moduli in sestavi - Ocena zasnove in odobritev tipa

Ta mednarodni standard določa minimalne zahteve za oceno zasnove in odobritev tipa koncentratorskih fotonapetostnih (CPV) modulov in sestavov, primernih za dolgotrajno uporabo v običajnih okoljih na prostem, kot je opredeljeno v standardu IEC 60721-2-1. Preskusno zaporedje delno temelji na zaporedju, določenem v standardu IEC 61215-1 za oceno zasnove in odobritev tipa za ploščate prizemne fotonapetostne module iz kristalnega silicija. Vendar so bile vpeljane spremembe, ki obravnavajo posebne funkcije koncentratorskih fotonapetostnih sprejemnikov in modulov, zlasti glede ločevanja preskusov na mestu uporabe in laboratorijskih preskusov, učinkov poravnave, visoke tokovne gostote in hitrih temperaturnih sprememb, na podlagi katerih so bili pripravljeni nekateri novi preskusni postopki ali nove zahteve.
Namen tega preskusnega standarda je določiti električne, mehanske in toplotne lastnosti koncentratorskih fotonapetostnih modulov in sestavov ter prikazati (kot je mogoče v razumnih stroškovnih in časovnih omejitvah), da lahko koncentratorski fotonapetostni moduli in sestavi prenesejo učinke dolgotrajne izpostavljenosti v okoljih, opisanih v okviru področja uporabe. Dejanska življenjska doba tako ocenjenih koncentratorskih fotonapetostnih modulov in sestavov je odvisna od njihove zasnove, izdelave, okolja uporabe in pogojev delovanja.
Ta standard se uporablja skupaj z navodili za ponovno preskušanje, opisanimi v dodatku B.

General Information

Status
Published
Publication Date
24-Aug-2022
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
01-Aug-2022
Due Date
06-Oct-2022
Completion Date
25-Aug-2022

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SLOVENSKI STANDARD
SIST EN IEC 62108:2022
01-september-2022
Nadomešča:
SIST EN 62108:2017
Koncentratorski fotonapetostni (CPV) moduli in sestavi - Ocena zasnove in
odobritev tipa

Concentrator photovoltaic (CPV) modules and assemblies - Design qualification and type

approval
Konzentrator-Photovoltaik(CPV)-Module und -Anordnungen - Bauarteignung und
Bauartzulassung

Modules et ensembles photovoltaïques à concentration - Qualification de la conception

et homologation
Ta slovenski standard je istoveten z: EN IEC 62108:2022
ICS:
27.160 Sončna energija Solar energy engineering
SIST EN IEC 62108:2022 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN IEC 62108:2022
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SIST EN IEC 62108:2022
EUROPEAN STANDARD EN IEC 62108
NORME EUROPÉENNE
EUROPÄISCHE NORM July 2022
ICS 27.160 Supersedes EN 62108:2016
English Version
Concentrator photovoltaic (CPV) modules and assemblies -
Design qualification and type approval
(IEC 62108:2022)

Modules et ensembles photovoltaïques à concentration - Konzentrator-Photovoltaik(CPV)-Module und -Anordnungen

Qualification de la conception et homologation - Bauarteignung und Bauartzulassung

(IEC 62108:2022) (IEC 62108:2022)

This European Standard was approved by CENELEC on 2022-07-07. 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the

Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Türkiye and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2022 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN IEC 62108:2022 E
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SIST EN IEC 62108:2022
EN IEC 62108:2022 (E)
European foreword

The text of document 82/2024/FDIS, future edition 3 of IEC 62108, prepared by IEC/TC 82 "Solar

photovoltaic energy systems" was submitted to the IEC-CENELEC parallel vote and approved by

CENELEC as EN IEC 62108:2022.
The following dates are fixed:

• latest date by which the document has to be implemented at national (dop) 2023-04-07

level by publication of an identical national standard or by endorsement

• latest date by which the national standards conflicting with the (dow) 2025-07-07

document have to be withdrawn

This document supersedes EN 62108:2016 and all of its amendments and corrigenda (if any).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.

Any feedback and questions on this document should be directed to the users’ national committee. A

complete listing of these bodies can be found on the CENELEC website.
Endorsement notice

The text of the International Standard IEC 62108:2022 was approved by CENELEC as a European

Standard without any modification.
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SIST EN IEC 62108:2022
EN IEC 62108:2022 (E)
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements 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 1 Where 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 60529 - Degrees of protection provided by - -
enclosures (IP Code)
IEC 60664-1 2020 Insulation coordination for equipment EN IEC 60664-1 2020
within low-voltage supply systems - Part 1:
Principles, requirements and tests
IEC 60721-2-1 - Classification of environmental conditions - EN 60721-2-1 -
Part 2-1: Environmental conditions
appearing in nature - Temperature and
humidity
IEC 60904-1 2020 Photovoltaic devices - Part 1: EN IEC 60904-1 2020
Measurement of photovoltaic current-
voltage characteristics
IEC 60904-1-1 2017 Photovoltaic devices - Part 1-1: EN 60904-1-1 2017
Measurement of current-voltage
characteristics of multi-junction
photovoltaic (PV) devices
IEC/TS 60904-1-2 2019 Photovoltaic devices - Part 1-2: - -
Measurement of current-voltage
characteristics of bifacial photovoltaic (PV)
devices
IEC 60904-2 2015 Photovoltaic devices - Part 2: EN 60904-2 2015
Requirements for photovoltaic reference
devices
IEC 60904-3 2019 Photovoltaic devices - Part 3: EN IEC 60904-3 2019
Measurement principles for terrestrial
photovoltaic (PV) solar devices with
reference spectral irradiance data
IEC 60904-4 2019 Photovoltaic devices - Part 4: Reference EN IEC 60904-4 2019
solar devices - Procedures for establishing
calibration traceability
IEC 60904-5 2011 Photovoltaic devices - Part 5: EN 60904-5 2011
Determination of the equivalent cell
temperature (ECT) of photovoltaic (PV)
devices by the open-circuit voltage method
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SIST EN IEC 62108:2022
EN IEC 62108:2022 (E)
IEC 60904-7 2019 Photovoltaic devices - Part 7: Computation EN IEC 60904-7 2019
of the spectral mismatch correction for
measurements of photovoltaic devices
IEC 60904-8 2014 Photovoltaic devices - Part 8: EN 60904-8 2014
Measurement of spectral responsivity of a
photovoltaic (PV) device
IEC 60904-8-1 2017 Photovoltaic devices - Part 8-1: EN 60904-8-1 2017
Measurement of spectral responsivity of
multi-junction photovoltaic (PV) devices
IEC 61140 2016 Protection against electric shock - EN 61140 2016
Common aspects for installation and
equipment
IEC 61210 (mod) 2010 Connecting devices - Flat quick-connect EN 61210 2010
terminations for electrical copper
conductors - Safety requirements
IEC 61215-1 2021 Terrestrial photovoltaic (PV) modules - EN IEC 61215-1 2021
Design qualification and type approval -
Part 1: Test requirements
IEC 61215-2 2021 Terrestrial photovoltaic (PV) modules - EN IEC 61215-2 2021
Design qualification and type approval -
Part 2: Test procedures
IEC/TS 61836 2016 Solar photovoltaic energy systems - -
Terms, definitions and symbols
IEC 61853-1 2011 Photovoltaic (PV) module performance - -
testing and energy rating - Part 1:
Irradiance and temperature performance
measurements and power rating
IEC 61853-2 2016 Photovoltaic (PV) module performance EN 61853-2 2016
testing and energy rating - Part 2: Spectral
responsivity, incidence angle and module
operating temperature measurements
IEC 61853-3 2018 Photovoltaic (PV) module performance EN IEC 61853-3 2018
testing and energy rating – Part 3: Energy
rating of PV modules
IEC 62670-1 - Photovoltaic concentrators (CPV) - EN 62670-1 -
Performance testing - Part 1: Standard
conditions
IEC 62670-3 2017 Photovoltaic concentrators (CPV) - EN 62670-3 2017
Performance testing – Part 3: Performance
measurements and power rating
IEC 62790 2020 Junction boxes for photovoltaic modules - EN IEC 62790 2020
Safety requirements and tests
IEC 62852 2014 Connectors for DC-application in EN 62852 2015
photovoltaic systems - Safety requirements
and tests
+ A1 2020 + A1 2020
- - + AC 2019-02
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SIST EN IEC 62108:2022
IEC 62108
Edition 3.0 2022-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Concentrator photovoltaic (CPV) modules and assemblies – Design qualification
and type approval
Modules et ensembles photovoltaïques à concentration – Qualification de la
conception et homologation
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 27.160 ISBN 978-2-8322-3824-0

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
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SIST EN IEC 62108:2022
– 2 – IEC 62108:2022 © IEC 2022
CONTENTS

FOREWORD ........................................................................................................................... 5

1 Scope .............................................................................................................................. 7

2 Normative references ...................................................................................................... 7

3 Terms and definitions ...................................................................................................... 9

4 Sampling ....................................................................................................................... 10

5 Marking ......................................................................................................................... 11

6 Testing .......................................................................................................................... 11

7 Pass criteria .................................................................................................................. 12

8 Report ........................................................................................................................... 20

9 Modifications ................................................................................................................. 21

10 Test procedures ............................................................................................................ 21

10.1 Visual inspection ................................................................................................... 21

10.1.1 General ......................................................................................................... 21

10.1.2 Procedure ...................................................................................................... 21

10.1.3 Major visual defects ....................................................................................... 22

10.1.4 Requirements ................................................................................................ 22

10.2 Electrical performance measurement .................................................................... 22

10.2.1 Purpose ......................................................................................................... 22

10.2.2 Outdoor side-by-side I-V measurement .......................................................... 22

10.2.3 Solar simulator I-V measurement ................................................................... 24

10.2.4 Dark I-V measurement ................................................................................... 24

10.3 Ground path continuity test ................................................................................... 25

10.3.1 General ......................................................................................................... 25

10.3.2 Purpose ......................................................................................................... 25

10.3.3 Procedure ...................................................................................................... 25

10.3.4 Requirements ................................................................................................ 25

10.4 Electrical insulation test ........................................................................................ 26

10.4.1 Purpose ......................................................................................................... 26

10.4.2 Procedure ...................................................................................................... 26

10.4.3 Requirements ................................................................................................ 26

10.5 Wet insulation test ................................................................................................ 27

10.5.1 Purpose ......................................................................................................... 27

10.5.2 Procedure ...................................................................................................... 27

10.5.3 Requirements ................................................................................................ 27

10.6 Thermal cycling test .............................................................................................. 27

10.6.1 Purpose ......................................................................................................... 27

10.6.2 Test sample ................................................................................................... 28

10.6.3 Procedure ...................................................................................................... 28

10.6.4 Procedure for active cooling system .............................................................. 30

10.6.5 Requirements ................................................................................................ 30

10.7 Damp heat test ..................................................................................................... 31

10.7.1 Purpose ......................................................................................................... 31

10.7.2 Test sample ................................................................................................... 31

10.7.3 Procedure ...................................................................................................... 31

10.7.4 Requirements ................................................................................................ 32

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SIST EN IEC 62108:2022
IEC 62108:2022 © IEC 2022 – 3 –

10.8 Humidity freeze test .............................................................................................. 32

10.8.1 Purpose ......................................................................................................... 32

10.8.2 Test sample ................................................................................................... 32

10.8.3 Procedure ...................................................................................................... 32

10.8.4 Requirements ................................................................................................ 32

10.9 Hail impact test ..................................................................................................... 33

10.9.1 Purpose ......................................................................................................... 33

10.9.2 Apparatus ...................................................................................................... 33

10.9.3 Procedure ...................................................................................................... 34

10.9.4 Requirements ................................................................................................ 34

10.10 Dust and water ingress protection test .................................................................. 34

10.10.1 Purpose ......................................................................................................... 34

10.10.2 Procedure ...................................................................................................... 35

10.10.3 Requirements ................................................................................................ 35

10.11 Bypass/blocking diode thermal test ....................................................................... 35

10.11.1 Purpose ......................................................................................................... 35

10.11.2 Test sample ................................................................................................... 35

10.11.3 Apparatus ...................................................................................................... 35

10.11.4 Procedure ...................................................................................................... 36

10.11.5 Requirements ................................................................................................ 36

10.11.6 Procedure 2 – Alternate method .................................................................... 36

10.12 Robustness of terminations test ............................................................................ 37

10.12.1 Purpose ......................................................................................................... 37

10.12.2 Procedure ...................................................................................................... 38

10.12.3 Requirements ................................................................................................ 38

10.13 Mechanical load test ............................................................................................. 38

10.13.1 Purpose ......................................................................................................... 38

10.13.2 Procedure ...................................................................................................... 39

10.13.3 Requirements ................................................................................................ 39

10.14 Off-axis beam damage test ................................................................................... 39

10.14.1 General ......................................................................................................... 39

10.14.2 Purpose ......................................................................................................... 39

10.14.3 Special case .................................................................................................. 39

10.14.4 Procedure ...................................................................................................... 40

10.14.5 Requirements ................................................................................................ 40

10.15 Outdoor exposure test .......................................................................................... 40

10.15.1 Purpose ......................................................................................................... 40

10.15.2 Procedure ...................................................................................................... 40

10.15.3 Requirements ................................................................................................ 41

10.16 Hot-spot endurance test ........................................................................................ 41

Annex A (informative) Summary of test conditions and requirements ................................... 42

Annex B (normative) Retesting guideline ............................................................................. 45

B.1 Product or process modifications requiring limited retesting to maintain

certification ........................................................................................................... 45

B.2 Modifications of CPV cell technology .................................................................... 45

B.3 Modifications in optical encapsulation on the cell (Includes optical coupling

between the cell and a glass secondary optical element bonded to the cell) .......... 46

B.4 Modification in cell encapsulation outside of intended light path ............................ 46

B.5 Modification of cell package substrate used for heat transfer ................................ 46

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SIST EN IEC 62108:2022
– 4 – IEC 62108:2022 © IEC 2022

B.6 Accessible optics (primary or secondary) .............................................................. 47

B.7 Inaccessible optics (secondary) ............................................................................ 47

B.8 Frame and/or mounting structure .......................................................................... 47

B.9 Enclosure ............................................................................................................. 48

B.10 Wiring compartment/junction box .......................................................................... 48

B.11 Interconnection terminals ...................................................................................... 48

B.12 Interconnection materials or technique (to cells and between receivers) ............... 49

B.13 Change in electrical circuit design in an identical package .................................... 49

B.14 Output power ........................................................................................................ 49

B.15 Thermal energy transfer means ............................................................................ 50

B.16 Adhesives ............................................................................................................. 50

Figure 1 – Schematic of point-focus dish PV concentrator ..................................................... 14

Figure 2 – Schematic of linear-focus trough PV concentrator ................................................ 15

Figure 3 – Schematic of point-focus Fresnel lens PV concentrator ........................................ 16

Figure 4 – Schematic of linear-focus Fresnel lens PV concentrator ....................................... 17

Figure 5 – Schematic of a heliostat CPV ............................................................................... 18

Figure 6 – Qualification test sequence for CPV modules ....................................................... 19

Figure 7 – Qualification test sequence for CPV assemblies ................................................... 20

Figure 8 – Temperature and current profile of thermal cycle test (not to scale) ..................... 31

Figure 9 – Profile of humidity-freeze test conditions .............................................................. 33

Figure 10 – Bypass diode thermal test .................................................................................. 37

Table 1 – Terms used for CPV .............................................................................................. 10

Table 2 – Allocation of test samples to typical test sequences .............................................. 12

Table 3 – Thermal cycle test options for sequence A ............................................................ 29

Table 4 – Humidity freeze test options for sequence B .......................................................... 32

Table 5 – Minimum wind loads .............................................................................................. 38

Table A.1 – Summary of test conditions and requirements .................................................... 42

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SIST EN IEC 62108:2022
IEC 62108:2022 © IEC 2022 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
CONCENTRATOR PHOTOVOLTAIC (CPV) MODULES AND ASSEMBLIES –
DESIGN QUALIFICATION AND TYPE APPROVAL
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.

IEC 62108 has been prepared by IEC technical committee 82: Solar photovoltaic energy

systems. It is an International Standard.

This third edition cancels and replaces the second edition published in 2016. This edition

constitutes a technical revision.

This edition includes the following significant technical changes with respect to the previous

edition:

a) Changes in the procedure of the thermal cycling test for the active cooling module.

b) Solar simulator I-V measurement.
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SIST EN IEC 62108:2022
– 6 – IEC 62108:2022 © IEC 2022
The text of this International Standard is based on the following documents:
Draft Report on voting
82/2024/FDIS 82/2046/RVD

Full information on the voting for its approval can be found in the report on voting indicated in

the above table.
The language used for the development of this International Standard is English.

This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in

accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available

at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are

described in greater detail at www.iec.ch/standardsdev/publications.

The committee has decided that the contents of this document will remain unchanged until the

stability date indicated on the IEC website under webstore.iec.ch in the data related to the

specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
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SIST EN IEC 62108:2022
IEC 62108:2022 © IEC 2022 – 7 –
CONCENTRATOR PHOTOVOLTAIC (CPV) MODULES AND ASSEMBLIES –
DESIGN QUALIFICATION AND TYPE APPROVAL
1 Scope

This document specifies the minimum requirements for the design qualification and type

approval of concentrator photovoltaic (CPV) m
...

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