Terrestrial photovoltaic (PV) modules - Design qualification and type approval - Part 1-1: Special requirements for testing of crystalline silicon photovoltaic (PV) modules

IEC 61215-1-1:2021 is available as IEC 61215-1-1:2021 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.
IEC 61215-1-1:2021 lays down requirements for the design qualification of terrestrial photovoltaic modules suitable for long-term operation in open-air climates. The useful service life of modules so qualified will depend on their design, their environment and the conditions under which they are operated. Test results are not construed as a quantitative prediction of module lifetime. In climates where 98th percentile operating temperatures exceed 70 °C, users are recommended to consider testing to higher temperature test conditions as described in IEC TS 63126. This document is intended to apply to all crystalline silicon terrestrial flat plate modules. This second edition cancels and replaces the first edition of IEC 61215-1-1, issued in 2016. This edition includes the following significant technical changes with respect to the previous edition:
a. A cyclic (dynamic) mechanical load test (MQT 20) added.
b. A test for detection of potential-induced degradation (MQT 21) added.
c. A bending test (MQT 22) for flexible modules added.
d. A procedure for stress specific stabilization – BO LID (MQT 19.3) added.
e. A final stabilization procedure for modules undergoing PID testing added

Modules photovoltaïques (PV) pour applications terrestres - Qualification de la conception et homologation - Partie 1-1: Exigences particulières d'essai des modules photovoltaïques (PV) au silicium cristallin

IEC 61215-1-1:2021 est disponible sous forme de IEC 61215-1-1:2021 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.
IEC 61215-1-1:2021 établit les exigences pour la qualification de la conception des modules photovoltaïques (PV) pour applications terrestres adaptés à une utilisation de longue durée dans les climats à l'air libre. La durée de vie utile des modules ainsi qualifiés dépend de leur conception, de leur environnement et de leurs conditions de fonctionnement. Les résultats d’essai ne sont pas considérés comme une prévision quantitative de la durée de vie des modules. Sous des climats pour lesquels les températures de fonctionnement du 98e percentile dépassent 70 °C, il est recommandé aux utilisateurs d'envisager d’effectuer des essais dans des conditions d’essai à des températures plus élevées telles que décrites dans l’IEC TS 63126. Le présent document est destiné à s'appliquer à tous les modules à plaque plane au silicium cristallin pour applications terrestres. Cette deuxième édition annule et remplace la première édition de l'IEC 61215-1-1, parue en 2016. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: a. ajout d'un essai de charge mécanique (dynamique) cyclique (MQT 20); b. ajout d'un essai de dégradation induite du potentiel (MQT 21); c. ajout d'un essai de flexion (MQT 22) dédié aux modules souples; d. ajout d’une procédure de stabilisation spécifique aux contraintes – BO LID (MQT 19.3); e. ajout d'une procédure de stabilisation finale pour les modules soumis à l'essai PID.

General Information

Status
Published
Publication Date
22-Feb-2021
Current Stage
PPUB - Publication issued
Completion Date
23-Feb-2021
Ref Project

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IEC 61215-1-1
Edition 2.0 2021-02
INTERNATIONAL
STANDARD
Terrestrial photovoltaic (PV) modules – Design qualification and type approval –

Part 1-1: Special requirements for testing of crystalline silicon photovoltaic (PV)

modules
IEC 61215-1-1:2021-02(en)
---------------------- Page: 1 ----------------------
THIS PUBLICATION IS COPYRIGHT PROTECTED
Copyright © 2021 IEC, Geneva, Switzerland

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 info@iec.ch
CH-1211 Geneva 20 www.iec.ch
Switzerland
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 corrigendum or an amendment might have been published.

IEC publications search - webstore.iec.ch/advsearchform IEC online collection - oc.iec.ch

The advanced search enables to find IEC publications by a Discover our powerful search engine and read freely all the

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committee, …). It also gives information on projects, replaced have access to up to date content tailored to your needs.

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IEC Just Published - webstore.iec.ch/justpublished
The world's leading online dictionary on electrotechnology,
Stay up to date on all new IEC publications. Just Published
containing more than 22 000 terminological entries in English
details all new publications released. Available online and
and French, with equivalent terms in 18 additional languages.
once a month by email.
Also known as the International Electrotechnical Vocabulary
(IEV) online.
IEC Customer Service Centre - webstore.iec.ch/csc
If you wish to give us your feedback on this publication or
need further assistance, please contact the Customer Service
Centre: sales@iec.ch.
---------------------- Page: 2 ----------------------
IEC 61215-1-1
Edition 2.0 2021-02
INTERNATIONAL
STANDARD
Terrestrial photovoltaic (PV) modules – Design qualification and type approval –

Part 1-1: Special requirements for testing of crystalline silicon photovoltaic (PV)

modules
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 27.160 ISBN 978-2-8322-9368-3

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

® Registered trademark of the International Electrotechnical Commission
---------------------- Page: 3 ----------------------
– 2 – IEC 61215-1-1:2021 © IEC 2021
CONTENTS

FOREWORD ........................................................................................................................... 4

1 Scope .............................................................................................................................. 6

2 Normative references ...................................................................................................... 6

3 Terms and definitions ...................................................................................................... 7

4 Test samples ................................................................................................................... 7

5 Marking and documentation ............................................................................................. 7

6 Testing ............................................................................................................................ 7

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

8 Major visual defects ......................................................................................................... 7

9 Report ............................................................................................................................. 7

10 Modifications ................................................................................................................... 7

11 Test flow and procedures ................................................................................................ 7

11.1 Visual inspection (MQT 01) ..................................................................................... 7

11.2 Maximum power determination (MQT 02) ................................................................ 7

11.3 Insulation test (MQT 03) ......................................................................................... 7

11.4 Measurement of temperature coefficients (MQT 04) ................................................ 8

11.5 Placeholder section, formerly NMOT ....................................................................... 8

11.6 Performance at STC (MQT 06.1) ............................................................................. 8

11.7 Performance at low irradiance (MQT 07) ................................................................. 8

11.8 Outdoor exposure test (MQT 08) ............................................................................. 8

11.9 Hot-spot endurance test (MQT 09) .......................................................................... 8

11.9.1 Purpose ........................................................................................................... 8

11.9.2 Classification of cell interconnection ................................................................ 8

11.9.3 Apparatus ........................................................................................................ 8

11.9.4 Procedure ........................................................................................................ 8

11.9.5 Final measurements ........................................................................................ 8

11.9.6 Requirements .................................................................................................. 8

11.10 UV preconditioning test (MQT 10) ........................................................................... 8

11.11 Thermal cycling test (MQT 11) ................................................................................ 9

11.12 Humidity-freeze test (MQT 12) ................................................................................ 9

11.13 Damp heat test (MQT 13) ........................................................................................ 9

11.14 Robustness of terminations(MQT 14) ...................................................................... 9

11.15 Wet leakage current test (MQT 15) ......................................................................... 9

11.16 Static mechanical load test (MQT 16) ...................................................................... 9

11.17 Hail test (MQT 17) .................................................................................................. 9

11.18 Bypass diode testing (MQT 18) ............................................................................... 9

11.19 Stabilization (MQT 19) .......................................................................................... 10

11.19.1 Criterion definition for stabilization ................................................................. 10

11.19.2 Light induced stabilization procedures ........................................................... 10

11.19.3 Other stabilization procedures ....................................................................... 10

11.19.4 Initial stabilization (MQT 19.1) ....................................................................... 10

11.19.5 Final stabilization (MQT 19.2) ........................................................................ 10

11.20 Cyclic (dynamic) mechanical load test (MQT 20) ................................................... 12

11.21 Potential induced degradation test (MQT 21) ........................................................ 12

11.22 Bending test (MQT 22) .......................................................................................... 12

---------------------- Page: 4 ----------------------
IEC 61215-1-1:2021 © IEC 2021 – 3 –

Figure 1 – Flow chart summary of MQT 19.2 ......................................................................... 12

---------------------- Page: 5 ----------------------
– 4 – IEC 61215-1-1:2021 © IEC 2021
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
TERRESTRIAL PHOTOVOLTAIC (PV) MODULES –
DESIGN QUALIFICATION AND TYPE APPROVAL –
Part 1-1: Special requirements for testing of crystalline
silicon photovoltaic (PV) modules
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 61215-1-1 has been prepared by IEC technical committee 82:

Solar photovoltaic energy systems.

This second edition cancels and replaces the first edition of IEC 61215-1-1, issued in 2016,

and constitutes a technical revision.

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

edition:
a) A cyclic (dynamic) mechanical load test (MQT 20) added.
b) A test for detection of potential-induced degradation (MQT 21) added.
c) A bending test (MQT 22) for flexible modules added.
d) A procedure for stress specific stabilization – BO LID (MQT 19.3) added.
---------------------- Page: 6 ----------------------
IEC 61215-1-1:2021 © IEC 2021 – 5 –
e) A final stabilization procedure for modules undergoing PID testing added.

Informative Annex A of IEC 61215-1:2021 explains the background and reasoning behind

some of the more substantial changes that were made in the IEC 61215 series in progressing

from edition 1 to edition 2.
The text of this International Standard is based on the following documents:
FDIS Report on voting
82/1824/FDIS 82/1849/RVD

Full information on the voting for the approval of this International Standard 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.

This standard is to be read in conjunction with IEC 61215-1:2021 and IEC 61215-2:2021.

A list of all parts in the IEC 61215 series, published under the general title Terrestrial

photovoltaic (PV) modules – Design qualification and type approval, ca
...

IEC 61215-1-1
Edition 2.0 2021-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Terrestrial photovoltaic (PV) modules – Design qualification and type approval –

Part 1-1: Special requirements for testing of crystalline silicon photovoltaic (PV)

modules
Modules photovoltaïques (PV) pour applications terrestres – Qualification de la
conception et homologation –
Partie 1-1: Exigences particulières d'essai des modules photovoltaïques (PV) au
silicium cristallin
IEC 61215-1-1:2021-02(en-fr)
---------------------- Page: 1 ----------------------
THIS PUBLICATION IS COPYRIGHT PROTECTED
Copyright © 2021 IEC, Geneva, Switzerland

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

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les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.

IEC Central Office Tel.: +41 22 919 02 11
3, rue de Varembé info@iec.ch
CH-1211 Geneva 20 www.iec.ch
Switzerland
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 corrigendum or an amendment might have been published.

IEC publications search - webstore.iec.ch/advsearchform IEC online collection - oc.iec.ch

The advanced search enables to find IEC publications by a Discover our powerful search engine and read freely all the

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containing more than 22 000 terminological entries in English
details all new publications released. Available online and
and French, with equivalent terms in 18 additional languages.
once a month by email.
Also known as the International Electrotechnical Vocabulary
(IEV) online.
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---------------------- Page: 2 ----------------------
IEC 61215-1-1
Edition 2.0 2021-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Terrestrial photovoltaic (PV) modules – Design qualification and type approval –

Part 1-1: Special requirements for testing of crystalline silicon photovoltaic (PV)

modules
Modules photovoltaïques (PV) pour applications terrestres – Qualification de la
conception et homologation –
Partie 1-1: Exigences particulières d'essai des modules photovoltaïques (PV) au
silicium cristallin
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 27.160 ISBN 978-2-8322-1015-9

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
---------------------- Page: 3 ----------------------
– 2 – IEC 61215-1-1:2021 © IEC 2021
CONTENTS

FOREWORD ........................................................................................................................... 3

1 Scope .............................................................................................................................. 5

2 Normative references ...................................................................................................... 5

3 Terms and definitions ...................................................................................................... 6

4 Test samples ................................................................................................................... 6

5 Marking and documentation ............................................................................................. 6

6 Testing ............................................................................................................................ 6

7 Pass criteria .................................................................................................................... 6

8 Major visual defects ......................................................................................................... 6

9 Report ............................................................................................................................. 6

10 Modifications ................................................................................................................... 6

11 Test flow and procedures ................................................................................................ 6

11.1 Visual inspection (MQT 01) ..................................................................................... 6

11.2 Maximum power determination (MQT 02) ................................................................ 6

11.3 Insulation test (MQT 03) ......................................................................................... 6

11.4 Measurement of temperature coefficients (MQT 04) ................................................ 7

11.5 Placeholder section, formerly NMOT ....................................................................... 7

11.6 Performance at STC (MQT 06.1) ............................................................................. 7

11.7 Performance at low irradiance (MQT 07) ................................................................. 7

11.8 Outdoor exposure test (MQT 08) ............................................................................. 7

11.9 Hot-spot endurance test (MQT 09) .......................................................................... 7

11.9.1 Purpose ........................................................................................................... 7

11.9.2 Classification of cell interconnection ................................................................ 7

11.9.3 Apparatus ........................................................................................................ 7

11.9.4 Procedure ........................................................................................................ 7

11.9.5 Final measurements ........................................................................................ 7

11.9.6 Requirements .................................................................................................. 7

11.10 UV preconditioning test (MQT 10) ........................................................................... 7

11.11 Thermal cycling test (MQT 11) ................................................................................ 8

11.12 Humidity-freeze test (MQT 12) ................................................................................ 8

11.13 Damp heat test (MQT 13) ........................................................................................ 8

11.14 Robustness of terminations(MQT 14) ...................................................................... 8

11.15 Wet leakage current test (MQT 15) ......................................................................... 8

11.16 Static mechanical load test (MQT 16) ...................................................................... 8

11.17 Hail test (MQT 17) .................................................................................................. 8

11.18 Bypass diode testing (MQT 18) ............................................................................... 8

11.19 Stabilization (MQT 19) ............................................................................................ 9

11.19.1 Criterion definition for stabilization ................................................................... 9

11.19.2 Light induced stabilization procedures ............................................................. 9

11.19.3 Other stabilization procedures ......................................................................... 9

11.19.4 Initial stabilization (MQT 19.1) ......................................................................... 9

11.19.5 Final stabilization (MQT 19.2) .......................................................................... 9

11.20 Cyclic (dynamic) mechanical load test (MQT 20) ................................................... 11

11.21 Potential induced degradation test (MQT 21) ........................................................ 11

11.22 Bending test (MQT 22) .......................................................................................... 11

Figure 1 – Flow chart summary of MQT 19.2 ......................................................................... 11

---------------------- Page: 4 ----------------------
IEC 61215-1-1:2021 © IEC 2021 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
TERRESTRIAL PHOTOVOLTAIC (PV) MODULES –
DESIGN QUALIFICATION AND TYPE APPROVAL –
Part 1-1: Special requirements for testing of crystalline
silicon photovoltaic (PV) modules
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 61215-1-1 has been prepared by IEC technical committee 82:

Solar photovoltaic energy systems.

This second edition cancels and replaces the first edition of IEC 61215-1-1, issued in 2016,

and constitutes a technical revision.

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

edition:
a) A cyclic (dynamic) mechanical load test (MQT 20) added.
b) A test for detection of potential-induced degradation (MQT 21) added.
c) A bending test (MQT 22) for flexible modules added.
d) A procedure for stress specific stabilization – BO LID (MQT 19.3) added.
---------------------- Page: 5 ----------------------
– 4 – IEC 61215-1-1:2021 © IEC 2021
e) A final stabilization procedure for modules undergoing PID testing added.

Informative Annex A of IEC 61215-1:2021 explains the background and reasoning behind

some of the more substantial changes that were made in the IEC 61215 series in progressing

from edition 1 to edition 2.
The text of this International Standard is based on the following documents:
FDIS Report on voting
82/1824/FDIS 82/1849/RVD

Full information on the voting for the approval of this International Standard 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.

This standard is to be read in conjunction with IEC 61215-1:2021 and IEC 61215-2:2021.

A list of all parts in the IEC 61215 series, published under the general title Terrestrial

photovoltaic (PV) modules – Design qualification and type approval, can be found on the

IEC website.

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

stability date indicated on the IEC website under "http://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.
---------------------- Page: 6 ----------------------
IEC 61215-1-1:2021 © IEC 2021 – 5 –
TERRESTRIAL PHOTOVOLTAIC (PV) MODULES –
DESIGN QUALIFICATION AND TYPE APPROVAL –
Part 1-1: Special requirements for testing of crystalline
silicon photovoltaic (PV) modules
1 Scope

This document lays down requirements for the design qualification of terrestrial photovoltaic

modules suitable for long-term operation in open-air climates. The useful service life of

modules so qualified will depend on their design, their environment and the conditions under

which they are operated. Test results are not construed as a quantitative prediction of module

lifetime. In climates where 98 percentile operating temperatures exceed 70 °C, users are

recommended to consider testing to higher temperature test conditions as described in

IEC TS 63126.

Users desiring qualification of PV products with lesser lifetime expectations are recommended

to consider testing designed for PV in consumer electronics, as described in IEC 63163

(under development). Users wishing to gain confidence that the characteristics tested in

IEC 61215 appear consistently in a manufactured product may wish to utilize IEC 62941

regarding quality systems in PV manufacturing.

This document is intended to apply to all crystalline silicon terrestrial flat plate modules.

This document does not apply to modules used with concentrated sunlight although it may be

utilized for low concentrator modules (1 to 3 suns). For low concentration modules, all tests

are performed using the irradiance, current, voltage and power levels expected at the design

concentration.

The objective of this test sequence is to determine the electrical characteristics of the module

and to show, as far as possible within reasonable constraints of cost and time, that the

module is capable of withstanding prolonged exposure outdoors. Accelerated test conditions

are empirically based on those necessary to reproduce selected observed field failures and

are applied equally across module types. Acceleration factors may vary with product design

and thus not all degradation mechanisms may manifest. Further general information on

accelerated test methods including definitions of terms may be found in IEC 62506.

Some long-term degradation mechanisms can only reasonably be detected via component

testing, due to long times required to produce the failure and necessity of stress conditions

that are expensive to produce over large areas. Component tests that have reached a

sufficient level of maturity to set pass/fail criteria with high confidence are incorporated into

the IEC 61215 series via addition to Table 1 in IEC 61215-1:2021. In contrast, the tests

procedures described in this series, in IEC 61215-2, are performed on modules.

This document defines PV technology dependent modifications to the testing procedures and

requirements per IEC 61215-1:2021 and IEC 61215-2:2021.
2 Normative references

The normative references of IEC 61215-1:2021 and IEC 61215-2:2021 are applicable without

modifications.
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3 Terms and definitions
This clause of IEC 61215-1:2021 is applicable without modifications.
4 Test samples
This clause of IEC 61215-1:2021 is applicable without modifications.
5 Marking and documentation
This clause of IEC 61215-1:2021 is applicable without modifications.
6 Testing
This clause of IEC 61215-1:2021 is applicable without modifications.
7 Pass criteria

This clause of IEC 61215-1:2021 is applicable with the modifications listed below:

The maximum allowable value of reproducibility is set to r = 1,0 %.
The maximum allowable value of measurement uncertainty is set to m = 3,0 %.
8 Major visual defects
This clause of IEC 61215-1:2021 is applicable without modifications.
9 Report
This clause of IEC 61215-1:2021 is applicable without modifications.
10 Modifications
This clause of IEC 61215-1:2021 is applicable without modifications.
11 Test flow and procedures
The test flow from IEC 61215-1:2021 is applicable.
11.1 Visual inspection (MQT 01)
This test of IEC 61215-2:2021 is applicable without modifications.
11.2 Maximum power determination (MQT 02)
This test of IEC 61215-2:2021 is applicable without modifications.
11.3 Insulation test (MQT 03)
This test of IEC 61215-2:2021 is applicable without modifications.
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IEC 61215-1-1:2021 © IEC 2021 – 7 –
11.4 Measurement of temperature coefficients (MQT 04)
This test of IEC 61215-2:2021 is applicable without modifications.
11.5 Placeholder section, formerly NMOT

This subclause of IEC 61215-2:2021 does not require technology-specific modifications.

11.6 Performance at STC (MQT 06.1)
This test of IEC 61215-2:2021 is applicable without modifications.
11.7 Performance at low irradiance (MQT 07)
This test of IEC 61215-2:2021 is applicable without modifications.
11.8 Outdoor exposure test (MQT 08)
This test of IEC 61215-2:2021 is applicable without modifications.
11.9 Hot-spot endurance test (MQT 09)
The relevant subclause of IEC 61215-2:2021, test MQT 09, is applicable without
modifications.
11.9.1 Purpose
The relevant subclause of IEC 61215-2:2021, test MQT 09, is applicable without
modifications.
11.9.2 Classification of cell interconnection
The relevant subclause of IEC 61215-2:2021, test MQT 09, is applicable without
modifications.
11.9.3 Apparatus
The relevant subclause of IEC 61215-2:2021, test MQT 09, is applicable without
modifications.
11.9.4 Procedure
MQT 09.1 shall be performed in accordance to IEC 61215-2:2021.
11.9.5 Final measurements
The relevant subclause of IEC 61215-2:2021, test MQT 09, is applicable without
modifications.
11.9.6 Requirements
The relevant subclause of IEC 61215-2:2021, test MQT 09, is applicable without
modifications.
11.10 UV preconditioning test (MQT 10)
This test of IEC 61215-2:2021 is applicable without modifications.
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11.11 Thermal cycling test (MQT 11)
This test of IEC 61215-2:2021 is applicable without modifications.

For monofacial modules, the technology specific current which needs to be applied according

to test MQT 11 of IEC 61215-2:2021, shall be equal to the STC peak power current. For

bifacial modules, the technology specific current which needs to be applied according to test

MQT 11 of IEC 61215-2:2021, shall be equal to the peak power current at the elevated

irradiance level BSI, as defined in IEC 61215-1,3.12. The peak power current at irradiance

) may be determined either by a measurement (MQT 06.1) at irradiance BSI, or by
BSI (I
mp-BSI

assuming linearity of peak power current with irradiance. Assuming linearity allows one to

calculate I , using I values measured for Gate No. 1 (I and I ), and the
mp-BSI mp mp-STC mp-BNPI
relevant equivalent irradiances: 1 000 Wm , G , and G . To extrapolate I , these
BNPI BSI mp-BSI
quantities are combined as follows:
(𝐼𝐼 − 𝐼𝐼 )
mp−BNPI mp−STC
( )
𝐼𝐼 = 𝐼𝐼 + × 𝐺𝐺 −𝐺𝐺
mp−BSI mp−BNPI −2 BSI BNPI
𝐺𝐺 − 1000 Wm
𝐵𝐵𝐵𝐵𝐵𝐵𝐵𝐵

In the above formula, equivalent irradiance is calculated as in IEC TS 60904-1-2, specifically:

−2 −2
𝐺𝐺 = 1 000 Wm +φ × 135 Wm
BNPI
−2 −2
𝐺𝐺 = 1 000 Wm +φ × 300 Wm
BSI
φ = 𝑀𝑀𝑀𝑀𝑀𝑀(φ ,φ )
𝐼𝐼sc 𝑃𝑃max
11.12 Humidity-freeze test (MQT 12)
This test of IEC 61215-2:2021 is applicable without modifications.
11.13 Damp heat test (MQT 13)

This test of IEC 61215- 2:2021 shall be performed without modifications. Modules shall be

subject to the requirements in MQT 19.2 prior to evaluation of gate No. 2.
11.14 Robustness of terminations (MQT 14)
This test of IEC 61215-2:2021 is applicable without modifications.
11.15 Wet leakage current test (MQT 15)
This test of IEC 61215-2:2021 is applicable without modifications.
11.16 Static mechanical load test (MQT 16)
This test of IEC 61215-2:2021 is applicable without modifications.
11.17 Hail test (MQT 17)
This test of IEC 61215-2:2021 is applicable without modifications.
11.18 Bypass diode testing (MQT 18)
This test of IEC 61215-2 is applicable without modifications.
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IEC 61215-1-1:2021 © IEC 2021 – 9 –
11.19 Stabilization (MQT 19)
This test of IEC 61215-2:2021 is applicable with the following modifications:
11.19.1 Criterion definition for stabilization

For the definition of stabilization as per test MQT 19 of IEC 61215-2:2021, x = 0,01 shall be

used for crystalline silicon PV modules.
11.19.2 Light induced stabilization procedures
This test of IEC 61215-2:2021 is applicable without modifications.
11.19.3 Other stabilization procedures
This test of IEC 61215-2:2021 is applicable without modifications.
11.19.4 Initial stabilization (MQT 19.1)

Initial stabilization of c-Si modules shall be obtained by exposing all modules to sunlight

(either real or simulated) to an irradiation dose level of ≥10 kWh/m . After this preconditioning

all of the test modules shall be measured for STC power (MQT 06.1).

To fulfil MQT 19 requirements two intervals of at least 5 kWh/m each are required.

If stabilization is performed outdoors no module temperature limits apply.

A validated alternative procedure can be used in accordance to MQT 19 of IEC 61215-2:2021.

After module stabilization, the timeframe for the subsequent tests is not critical. Perform all

measurements within a comparable timeframe and state time in report.
11.19.5 Final stabilization (MQT 19.2)

Final stabilization (MQT 19.2) is not required, except for modules that have been tested

according to MQT 21, Potential induced degradation test (in sequence F), or MQT 13, Damp

heat test (in sequence E). Final stabilization requirements differ depending on whether the

module has been subjected to MQT 13 or MQT 21.

For modules that have been tested according to MQT 13, damp heat test (in sequence E), a

choice of two final stabilization methods, "Method 1" or "Method 2", is available:

Method 1)
• Perform MQT 19.3 as defined in IEC 61215-2.
• Record choice of stabilization method 1) in the test report.

• Final stabilization is complete. Proceed with the test flow defined in IEC 61215, which

involves MQT 06.1 and gate No. 2.
Method 2)
• Perform MQT 06.1 and evaluate the gate No. 2 formula defined in IEC 61215-1.

• If the module passes gate No. 2, then final stabilization, MQT 06.1, and gate No. 2 are all

complete. In the test report, record stabilization method 2, MQT 06.1 results, and the

following text: "This module was not stabilized, and therefore the amount of degradation

observed may be larger than what would have been obtained if the module had been

stabilized, due to destabilization artifacts." Proceed to the next step of the test flow

defined in IEC 61215, which is MQT 03.
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• If the module does not pass gate No. 2, record the initial MQT 06.1 result, then perform

each step of Method 1).

For modules that have been tested according to MQT 21, PID (in sequence F) a choice of two

final stabilization methods, "Method 3" or "Method 4", is available:
Method 3)
• Modules shall be exposed to an irradiation of (2,0 ± 0,2) kWh/m .

• Exposure shall be performed as per IEC 61215-2:2021 MQT 10, with the temperature and

spectrum meeting the requirements specified therein. Heat-up, exposure, and cool-down

shall be performed such that the module spends less than 24 h above 40 °C. The only

differences between the exposure in Method 3 and that in MQT 10 are the total dose,

which side of the module is exposed, and the addition of a time limit.

• For bifacial modules, the irradiance shall be applied to the rear side, whereas for

monofacial modules, the irradiance shall be applied to the front side.

• The class CCC solar simulator listed as required apparatus in MQT 19.2 shall fulfill the

class C spectral requirements over at least the short-wavelength portion of the extended

wavelength range described in IEC 60904-9.
• Record choice of stabilization method 3) in the test report.
• Final stabilization is complete. Proceed with the test flow defined in IE
...

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