IEC TS 63126:2020

IEC TS 63126 ®
Edition 1.0 2020-06
TECHNICAL
SPECIFICATION
colour
inside
Guidelines for qualifying PV modules, components and materials for operation
at high temperatures
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IEC TS 63126 ®
Edition 1.0 2020-06
TECHNICAL
SPECIFICATION
colour
inside
Guidelines for qualifying PV modules, components and materials for operation

at high temperatures
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 27.160 ISBN 978-2-8322-8396-7

– 2 – IEC TS 63126:2020 © IEC 2020
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 Modifications to IEC 61215-2 . 9
4.1 General . 9
4.2 Hot-spot endurance test (MQT 09) . 9
4.3 UV preconditioning test (MQT 10) . 9
4.4 Thermal cycling test (MQT 11) . 9
4.5 Bypass diode testing (MQT 18) . 9
5 Modifications to IEC 61730 . 10
5.1 IEC 61730-1 . 10
5.2 IEC 61730-2 . 10
5.2.1 General . 10
5.2.2 Hot spot endurance test (MST 22) . 10
5.2.3 Bypass diode thermal test (MST 25) . 10
5.2.4 Materials creep test (MST 37) . 10
5.2.5 Thermal cycling test (MST 51) . 11
5.2.6 UV test (MST 54) . 11
5.2.7 Dry heat conditioning (MST 56) . 11
6 Modifications to component standards . 11
6.1 Polymeric packaging material testing requirements . 11
6.1.1 Test procedures for durability of polymer packaging materials . 11
6.1.2 Polymeric back sheets and front sheets . 11
6.2 Junction boxes according to IEC 62790 . 11
6.3 Connectors for DC application in photovoltaic systems according to
IEC 62852 . 12
6.4 Electric cables for photovoltaic systems with a voltage rating of 1,5 KV DC
according to IEC 62930 . 12
7 Test modification summary . 12
8 Reporting. 12
Annex A (informative) Determination of temperature level . 13
A.1 General . 13
A.2 Modelling . 13
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A.3 98 -percentile temperatures (T ) . 14
98th
A.4 Guidance on module temperature for several locations . 15
Bibliography . 18

Figure A.1 – Histogram and CDF of module temperature for Riyadh, Saudi Arabia. 15
Figure A.2 – Time series from the model for Riyadh . 15
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Figure A.3 – 98 -percentile temperature for an open-rack, or thermally unrestricted,
glass superstrate, polymer backsheet module . 16

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Figure A.4 – 98 -percentile temperature for a close-roof mounted glass superstrate,
polymer backsheet module . 16
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Figure A.5 – 98 -percentile temperature for insulated-back glass superstrate, polymer
backsheet module . 17

Table 1 – Test modification summary . 12

– 4 – IEC TS 63126:2020 © IEC 2020
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
GUIDELINES FOR QUALIFYING PV MODULES, COMPONENTS
AND MATERIALS FOR OPERATION AT HIGH TEMPERATURES

FOREWORD
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Technical Specifications are subject to review within three years of publication to decide
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IEC TS 63126, which is a Technical Specification, has been prepared by IEC technical
committee 82: Solar photovoltaic energy systems.

The text of this Technical Specification is based on the following documents:
Draft TS Report on voting
82/1662/DTS 82/1706A/RVDTS
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.
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– 6 – IEC TS 63126:2020 © IEC 2020
INTRODUCTION
The IEC 61215 series, IEC 61730 series, IEC 62790 and IEC 62852 are considered suitable for
an environmental temperature range of at least -40 °C to + 40 °C and for modules operating in
th
such conditions that a 98 percentile module operational temperature of 70 °C or less applies.
This environmental temperature range encompasses many locations and installation styles in
these locations. As an example, it has been determined that thermally unrestricted, or open-
th
rack-style structures, in most cas
...