SIST EN IEC 62788-2-1:2024/kprA1:2026
(Amendment)Amendment 1 - Measurement procedures for materials used in photovoltaic modules - Part 2-1: Polymeric materials - Frontsheet and backsheet - Safety requirements
Messverfahren für Werkstoffe, die in Photovoltaik-Modulen verwendet werden - Teil 2-1: Polymerwerkstoffe - Frontsheets und Backsheets - Sicherheitsanforderungen
Procédures de mesure des matériaux utilisés dans les modules photovoltaïques - Partie 2-1: Matériaux polymères - Face avant et face arrière - Exigences de sécurité
Merilni postopki za materiale, uporabljene v fotonapetostnih modulih - 2-1. del: Polimerni materiali - Prednja in zadnja plast - Varnostne zahteve - Dopolnilo A1
General Information
- Status
- Not Published
- Public Enquiry End Date
- 09-Mar-2026
- Technical Committee
- PVS - Solar photovoltaic energy systems
- Current Stage
- 5020 - Formal vote (FV) (Adopted Project)
- Start Date
- 02-Jun-2026
- Due Date
- 21-Jul-2026
Relations
- Effective Date
- 15-Jul-2025
Overview
SIST EN IEC 62788-2-1:2024/kprA1:2026 is an amendment to the international standard for measurement procedures focusing on polymeric materials - specifically the frontsheet and backsheet - used in photovoltaic (PV) modules. Published by the Slovenian Institute for Standardization (SIST), this amendment refines requirements for safety and testing, aligning measurement protocols with new industry needs and compatibility expectations connected to IEC 61730 and anticipated IEC 61215-1 updates. The document’s key audience includes PV module manufacturers, testing laboratories, and materials suppliers who need to ensure the performance and safety of polymeric encapsulation layers in PV applications.
Key Topics
- Measurement Procedures: The amendment clarifies and updates procedures for evaluating polymeric materials in PV modules, focusing on both frontsheet and backsheet safety properties.
- Thermal and UV Weathering Protocols: Updated exposure levels (“Level 0”, “Level 1”, “Level 2”) and alternative test conditions for various color and absorption properties of materials ensure proper assessment under realistic environmental stresses.
- Safety and Endurance Requirements: Revision of safety protocols enhances alignment with IEC 61730 for the certification of PV modules, ensuring consistency in defining maximum operating temperatures and related test conditions.
- Optical Durability: Additional testing for optical transmittance of frontsheets anticipates future requirements from IEC 61215-1, supporting both safety and long-term module performance.
- Terminology Updates: Adjusted text ensures consistent use of terminology such as “Level” and updated definitions like FBST (front- or backsheet safety test) in line with technical specifications.
Applications
This amendment has practical implications across several stages of the photovoltaic module lifecycle:
- Module Design and Development: Manufacturers can use the outlined testing parameters to select appropriate polymeric materials (frontsheets and backsheets) that meet required safety and durability standards.
- Certification and Compliance: The revised procedures provide clear benchmarks for accredited test laboratories performing certification tests in line with current IECEE and IECQA requirements.
- Quality Assurance: The standards guide quality management teams in ensuring that materials maintain essential structural and optical properties after exposure to UV and damp heat, reducing the risk of field failures and warranty claims.
- Material Qualification: Suppliers of polymeric films and laminates use these measurement and safety requirements to develop materials tailored for different climatic and installation conditions, helping module manufacturers address a broader range of operational scenarios.
Related Standards
This amendment is closely tied to the following solar photovoltaic and polymeric material standards:
- IEC 61730: Safety qualification for photovoltaic (PV) modules - key reference for test sequences and temperature operating ranges.
- IEC 61215-1: Terrestrial photovoltaic (PV) modules - design qualification and type approval - expected to introduce further optical durability tests referenced within this amendment.
- IEC TS 62788-2 & IEC TS 62788-7-2: Technical specifications for testing protocols used in material assessment, including UV weathering and thermal testing conditions.
- IEC TS 63126: Defines extended test conditions for PV modules intended for high temperature environments.
Aligning with SIST EN IEC 62788-2-1:2024/kprA1:2026 helps PV industry stakeholders demonstrate compliance with evolving international requirements for safety, performance, and material durability in solar energy systems.
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Frequently Asked Questions
SIST EN IEC 62788-2-1:2024/kprA1:2026 is a draft published by the Slovenian Institute for Standardization (SIST). Its full title is "Amendment 1 - Measurement procedures for materials used in photovoltaic modules - Part 2-1: Polymeric materials - Frontsheet and backsheet - Safety requirements". This standard covers: Amendment 1 - Measurement procedures for materials used in photovoltaic modules - Part 2-1: Polymeric materials - Frontsheet and backsheet - Safety requirements
Amendment 1 - Measurement procedures for materials used in photovoltaic modules - Part 2-1: Polymeric materials - Frontsheet and backsheet - Safety requirements
SIST EN IEC 62788-2-1:2024/kprA1:2026 is classified under the following ICS (International Classification for Standards) categories: 27.160 - Solar energy engineering; 83.080.01 - Plastics in general. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN IEC 62788-2-1:2024/kprA1:2026 has the following relationships with other standards: It is inter standard links to SIST EN IEC 62788-2-1:2024. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
SIST EN IEC 62788-2-1:2024/kprA1:2026 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN IEC 62788-2-1:2024/oprA1:2026
01-februar-2026
Merilni postopki za materiale, uporabljene v fotonapetostnih modulih - 2-1. del:
Polimerni materiali - Prednja in zadnja plast - Varnostne zahteve - Dopolnilo A1
Amendment 1 - Measurement procedures for materials used in photovoltaic modules -
Part 2-1: Polymeric materials - Frontsheet and backsheet - Safety requirements
Messverfahren für Werkstoffe, die in Photovoltaik-Modulen verwendet werden - Teil 2-1:
Polymerwerkstoffe - Frontsheets und Backsheets - Sicherheitsanforderungen
Procédures de mesure des matériaux utilisés dans les modules photovoltaïques - Partie
2-1: Matériaux polymères - Face avant et face arrière - Exigences de sécurité
Ta slovenski standard je istoveten z: EN IEC 62788-2-1:2023/prA1:2025
ICS:
27.160 Sončna energija Solar energy engineering
83.080.01 Polimerni materiali na Plastics in general
splošno
SIST EN IEC 62788-2-1:2024/oprA1:2026 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
SIST EN IEC 62788-2-1:2024/oprA1:2026
SIST EN IEC 62788-2-1:2024/oprA1:2026
82/2535/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 62788-2-1/AMD1 ED1
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2025-12-26 2026-03-20
SUPERSEDES DOCUMENTS:
82/2469/CD, 82/2508A/CC
IEC TC 82 : SOLAR PHOTOVOLTAIC ENERGY SYSTEMS
SECRETARIAT: SECRETARY:
United States of America Mr George Kelly
OF INTEREST TO THE FOLLOWING COMMITTEES: HORIZONTAL FUNCTION(S):
ASPECTS CONCERNED:
Safety
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft
for Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of
which they are aware and to provide supporting documentation.
Recipients of this document are invited to submit, with their comments, notification of any relevant “In Some Countries”
clauses to be included should this proposal proceed. Recipients are reminded that the CDV stage is the final stage for
submitting ISC clauses. (SEE AC/22/2007 OR NEW GUIDANCE DOC).
TITLE:
Amendment 1 - Measurement procedures for materials used in photovoltaic modules - Part 2-1:
Polymeric materials - Frontsheet and backsheet - Safety requirements
PROPOSED STABILITY DATE: 2031
electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions.
You may not copy or "mirror" the file or printed version of the document, or any part of it, for any other purpose without
permission in writing from IEC.
SIST EN IEC 62788-2-1:2024/oprA1:2026
NOTE FROM TC/SC OFFICERS:
This project was discussed and supported by WG2 during their meeting in 2025-09.
SIST EN IEC 62788-2-1:2024/oprA1:2026
IEC CDV 62788-2-1/AMD1 © IEC 2025
1 PROPOSED AMENDMENT FOR:
3 MEASUREMENT PROCEDURES FOR MATERIALS USED IN PHOTOVOLTAIC
4 MODULES –
6 Part 2-1: Polymeric materials – Frontsheet and backsheet – Safety
7 requirements
9 Throughout IEC 62788-2-1 the when the word “level” is used to describe a defined thermal exposure
10 certification protocol, it shall be capitalized as “Level”.
12 In the FOREWORD, the reference to this technical specification should be “IEC TS 62788-2-1”.
14 The third paragraph of the Introduction currently reads:
15 This document focusses on the safety relevant properties of front- and backsheets as required by
16 IEC 61730.
17 Modify this to say:
18 This document focusses on the safety relevant properties of front- and backsheets as required by
19 IEC 61730, but also includes an optical durability test for polymer transmittance of frontsheets that
20 is anticipated to be required by IEC 61215-1 in the upcoming edition 3.
22 In the definitions section, add:
24 temperature Level 0
25 test sequences applied to PV modules where [T98]max is 70°C and all other tests are the defaults
26 for their respected tests in IEC 61730 and IEC 61215
27 The definition for FBST should read indicate a “TS” as:
28 FBST
29 Front- or backsheet safety test in accordance with IEC TS 62788-2-1.
31 The third paragraph in Clause 4 “Designation and ratings”, currently reads:
32 A front- or backsheet is rated for a maximum 𝑇 module operating temperature. The module
33 operating temperature is related to a combination of environment and mounting conditions as
34 described in IEC 61730-1 and IEC TS 63126:
th
35 IEC 61730-1 (by default) specifies PV modules with 98 percentile operating temperatures
36 T ≤ 70 °C.
37 IEC TS 63126 defines extended test conditions for high temperature operation with 𝑇 ≤
38 80 °C [level 1] or ≤ 90 °C [level 2]. The requirements for the thermal endurance test
[ ]
39 (FBST 06) depend on the specified 𝑇 . IEC 62788-2-1 deviates from
98 max
SIST EN IEC 62788-2-1:2024/oprA1:2026
IEC CDV 62788-2-1/AMD1 © IEC 2025
40 IEC TS 63126:2020, in that the UV weathering temperature conditions applied in the UV
41 weathering test (FBST 08) shall be as specified in Table 4.
42 Note: IEC TS 63126:2020 is currently under consideration for modification and will likely be changed to conform with this
43 document.
45 This should be changed to:
46 A front- or backsheet is rated for a maximum 𝑇 module operating temperature. The module
47 operating temperature is related to a combination of environment and mounting conditions as
48 described in IEC 61730-1 and IEC TS 63126:
th
49 IEC 61730-1 (by default) [Level 0] specifies PV modules with 98 percentile operating
50 temperatures T ≤ 70°C.
51 IEC TS 63126 defines extended test conditions for high temperature operation with 𝑇 ≤
52 80°C [Level 1] or ≤ 90°C [Level 2]. The requirements for the thermal endurance test
[ ]
53 (FBST 06) depend on the specified 𝑇 .
98 max
55 Clause 6.7.2 “UV weathering – FBST 08”, currently reads:
56 6.7.2 UV weathering – FBST 08
57 UV weathering is carried out using a xenon arc light source according to the method in IEC TS
58 62788-2 using the following exposures:
59 • For frontsheets, only the sun-facing side is tested:
60 – The sun-facing (air-)side shall be exposed directly to the test light
...