IEC 63202-1:2019

Photovoltaic cells - Part 1: Measurement of light-induced degradation of crystalline silicon photovoltaic cells

IEC 63202-1:2019 describes procedures for measuring the light-induced degradation (LID) of crystalline silicon photovoltaic (PV) cells in simulated sunlight. The magnitude of LID in a crystalline silicon PV cell is determined by comparing maximum output power at Standard Test Conditions (STC) before, and after, exposure to simulated sunlight at a specified temperature and irradiance.
The purpose of this document is to provide standardized PV cell LID information to help PV module manufacturers in minimizing the mismatch between cells within the same module, thereby maximizing power yield.

Cellules photovoltaïques - Partie 1: Mesure de la dégradation induite par la lumière des cellules photovoltaïques au silicium cristallin

l'IEC 63202-1:2019 décrit les procédures pour la mesure de la dégradation induite par la lumière (LID, light-induced degradation) des cellules photovoltaïques (PV) au silicium cristallin sous éclairement solaire simulé. L'amplitude de la dégradation induite par la lumière dans une cellule photovoltaïque au silicium cristallin est déterminée en comparant la puissance de sortie maximale aux conditions normales d’essai ((STC, standard test conditions) avant et après l'exposition à un éclairement solaire simulé, à une température et un éclairement spécifiés.
L'objet du présent document est de fournir des informations sur la dégradation induite par la lumière des cellules photovoltaïques normalisées, afin d'aider les fabricants de modules photovoltaïques à réduire le plus possible la désadaptation entre les cellules à l'intérieur du même module, augmentant ainsi au maximum le rendement de puissance.

General Information

• Status: Published
• Publication Date: 19-Jun-2019
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 27.160 - Solar energy engineering
• Technical Committee: TC 82 - Solar photovoltaic energy systems
• Drafting Committee: WG 8 - TC 82/WG 8
• Current Stage: PPUB - Publication issued
• Start Date: 31-May-2019
• Completion Date: 20-Jun-2019

Standards Content (Sample)

IEC 63202-1 ®
Edition 1.0 2019-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Photovoltaic cells –
Part 1: Measurement of light-induced degradation of crystalline silicon
photovoltaic cells
Cellules photovoltaïques –
Partie 1: Mesure de la dégradation induite par la lumière des cellules
photovoltaïques au silicium cristallin

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IEC 63202-1 ®
Edition 1.0 2019-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Photovoltaic cells –
Part 1: Measurement of light-induced degradation of crystalline silicon

photovoltaic cells
Cellules photovoltaïques –
Partie 1: Mesure de la dégradation induite par la lumière des cellules

photovoltaïques au silicium cristallin

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 27.160 ISBN 978-2-8322-6896-4

– 2 – IEC 63202-1:2019 © IEC 2019
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Apparatus . 6
5 Sampling . 6
6 Procedure for conditioning and evaluation . 6
7 Report . 8
Annex A (informative) Bar charts presented in the test report, showing the absolute
value of I degradation for all specimens after conditions in 6.1, 6.7 and 6.10 are met . 9
mp
Figure A.1 – I values of all test samples before and after LID tests . 9
mp
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
PHOTOVOLTAIC CELLS –
Part 1: Measurement of light-induced degradation
of crystalline silicon photovoltaic cells

FOREWORD
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International Standard IEC 63202-1 has been prepared by IEC technical committee 82: Solar
photovoltaic energy systems.
The text of this International Standard is based on the following documents:
FDIS Report on voting
82/1565/FDIS 82/1583/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.
A list of all parts in the IEC 63202 series, published under the general title Photovoltaic cells,
can be found on the IEC website.

– 4 – IEC 63202-1:2019 © IEC 2019
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.
PHOTOVOLTAIC CELLS –
Part 1: Measurement of light-induced degradation
of crystalline silicon photovoltaic cells

1 Scope
This part of IEC 63202 describes procedures for measuring the light-induced degradation (LID)
of crystalline silicon photovoltaic (PV) cells in simulated sunlight. The magnitude of LID in a
crystalline silicon PV cell is determined by comparing maximum output power at Standard
Test Conditions (STC) before, and after, exposure to simulated sunlight at a specified
temperature and irradiance.
The purpose of this document is to provide standardized PV cell LID information to help PV
module manufacturers in minimizing the mismatch between cells within the same module,
thereby maximizing power yield.
When compared to PV module LID measurements described in the IEC 61215 series, several
extra experimental factors have been found to show significant impact on the PV cell LID test,
which were not considered by IEC 61215-2. This document provides a conditioning and
measurements procedure and parameter settings required for consistent PV cell LID
measurements.
LID magnitude is one important factor of cell quality. For cells from the same sorting bin, the
most important factor is the distribution of output power after LID.
2 Normative references
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.
IEC 60904-1, Photovoltaic devices – Part 1: Measurements of photovoltaic current-voltage
characteristics
IEC 60904-2, Photovoltaic devices – Part 2: Requirements for photovoltaic reference
devices
IEC 60904-9, Photovoltaic devices – Part 9: Solar simulator performance requirements
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp

– 6 – IEC 63202-1:2019 © IEC 2019
4 Apparatus
The following apparatus are required to perform the test procedures defined in this document:
a) Solar simulator 1: Solar simulator for I-V curve measurements in accordance with
±1 °C, and the
IEC 60904-9, with means to measure cell temperature accurately to within
means to simultaneously measure the current and voltage produced by the PV cell as
defined in IEC 60904-1.
b) A
...