IEC TS 63392:2025

Fire test for concentrator PV modules

IEC TS 63392:2025 specifies a test method for evaluating the basic fire behaviour of modules used in concentrating systems with a maximum DC system voltage of 1 500 V or less. Since the concentrator module may be exposed to flames due to flying embers or fire may be caused by the module itself due to hot spots or arching (internal fire), the tests outlined in this document are conducted in these two modes.
Applicable fire testing may be required by local codes but are not covered in this document.
CPV system or CPV modules mounted in or on buildings, shall fulfil national building and construction codes, regulations, and requirements and are not covered by this Technical Specification. If national or local codes define fire test requirements, they should be followed. If such requirements are not available, the following international and national standards give information for tests, which could be used: ISO 5657, ENV 1187-1 to -4, ANSI/UL 790, EN 13501-1.

General Information

• Status: Published
• Publication Date: 19-Nov-2025
• ICS: 27.160 - Solar energy engineering
• Technical Committee: TC 82 - Solar photovoltaic energy systems
• Drafting Committee: WG 7 - TC 82/WG 7
• Current Stage: PPUB - Publication issued
• Start Date: 20-Nov-2025
• Completion Date: 24-Nov-2023

Standards Content (Sample)

IEC TS 63392 ®
Edition 1.0 2025-11
TECHNICAL
SPECIFICATION
Fire test for concentrator PV modules

ICS 27.160  ISBN 978-2-8322-8656-2

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CONTENTS
FOREWORD . 2
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 5
4 Sampling . 6
5 Fire test procedure for the concentrator module . 11
5.1 General . 11
5.1.1 Overview . 11
5.1.2 Internal fire test . 11
5.1.3 External burning brand test . 11
5.1.4 Test facilities, apparatus, set-up, and test samples . 12
5.1.5 Ignition of brands . 12
5.2 Test conditions . 12
5.2.1 General. 12
5.2.2 External fire test . 13
5.2.3 Internal fire test . 13
5.2.4 Duration of test . 13
5.2.5 Wind velocity . 13
5.3 The requirement for the external fire test . 13
5.4 The requirement for the internal fire test . 14
5.5 Description of rating classification . 14
6 Report . 14

Figure 1 – Schematic of a point-focus dish PV concentrator . 7
Figure 2 – Schematic of a linear focus trough PV concentrator . 8
Figure 3 – Schematic of a point-focus Fresnel lens PV concentrator . 9
Figure 4 – Schematic of a linear-focus Fresnel lens PV concentrator . 10

Table 1 – Test set-up of the external and internal fire test . 12

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
Fire test for concentrator PV modules

FOREWORD
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IEC TS 63392 has been prepared by IEC technical committee 82: Solar photovoltaic energy
systems. It is a Technical Specification.
The text of this Technical Specification is based on the following documents:
Draft Report on voting
82/2132/DTS 82/2188/RVDTS
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 Technical Specification 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/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.
1 Scope
This document, which is a Technical Specification, specifies a test method for evaluating the
basic fire behavior of modules used in concentrating systems with a maximum DC system
voltage of 1 500 V or less. Since the concentrator module may be exposed to flames due to
flying embers or fire may be caused by the module itself due to hot spots or arching (internal
fire), the tests outlined in this document are conducted in these two modes.
Applicable fire testing may be required by local codes but are not covered in this document.
CPV system or CPV modules mounted in or on buildings, shall fulfil national building and
construction codes, regulations, and requirements and are not covered by this Technical
Specification. If national or local codes define fire test requirements, they should be followed.
If such requirements are not available, the following international and national standards give
information for tests, which could be used: ISO 5657, ENV 1187-1 to -4, ANSI/UL 790, EN
13501-1.
CPV modules that are constructed in the flat plate module format and operate at 3X and less
geometric concentration ratio are considered for evaluation to IEC 61730-1, Photovoltaic (PV)
module safety qualification – Part 1: Requirements for construction.
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 60695-11-20, Fire hazard testing - Part 11-20: Test flames - 500 W flame test method
IEC 61140, Protection against electric shock - Common aspects for installation and equipment
IEC 61730-1, Photovoltaic (PV) module safety qualification - Part 1: Requirements for
construction
IEC 61730-2, Photovoltaic (PV) module safety qualification - Part 2: Requirements for testing
IEC TS 61836, Solar photovoltaic energy systems - Terms, definitions and symbols
IEC 62108, Concentrator photovoltaic (CPV) modules and assemblies – Design qualification
and type approval
ISO 834-1, Fire-resistance tests - Elements of building construction - Part 1: General
Requirements
ISO TR 834-3, Fire-resistance tests - Elements of building construction - Part 3: Commentary
on test method and guide to the application of the outputs from the fire-resistance test
ENV 1187-1 to -4, Test methods for roof coverings under the influence of a thermal attack of
burning brands and radiant heat
ANSI/UL 790, Standard Test Methods for Fire Tests of Roof Coverings
EN 13501-1, Fire classification of construction products and building elements – Part 1:
Classification using data from reaction to fire tests
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC TS 61836 and the
following apply.
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
See Figure 1, Figure 2, Figure 3 and Figure 4 for schematics of various types of CPV.
3.1
concentrator
photovoltaic device that uses concentrated sunlight
[SOURCE: IEC 62108:2022, 3.1]
3.2
concentrator cell
basic photovoltaic device that is used under the illumination of concentrated sunlight
[SOURCE: IEC 62108:2022, 3.2]
3.3
concentrator optics
optical device that performs one or more of the following functions from its input to output:
increasing the light intensity, filtering the spectrum, modifying light intensity distribution, or
changing light direction. Typically, it is a lens or a mirror
Note 1
...