Method for measuring photovoltaic (PV) glass - Part 2: Measurement of transmittance and reflectance

IEC 62805-2:2017 specifies methods for measuring the transmittance and reflectance of glass used in photovoltaic (PV) modules and provides instructions on how to calculate the effective hemispherical transmittance and reflectance of this glass. This document is applicable to PV glasses used in PV modules, including ultra-clear patterned glass, anti-reflective coated (AR) glass, transparent conductive oxide coated (TCO) glass and other kinds of PV glass used in PV modules. These test methods are designed to provide reproducible data appropriate for comparison of results among laboratories or at different times by the same laboratory and for comparison of data obtained on different PV glasses.

Verfahren für die Messung von photovoltaischem (PV) Glas - Teil 2: Messung von Transmissionsgrad und Reflexionsgrad

Méthode de mesure du verre photovoltaïque (PV) – Partie 2: Mesurage du facteur de transmission et du facteur de réflexion

L'IEC 62805-2:2017 spécifie des méthodes de mesure du facteur de transmission et du facteur de réflexion du verre utilisé dans les modules photovoltaïques (PV) et fournit des instructions concernant la façon de calculer le facteur de transmission et le facteur de réflexion hémisphériques effectifs dudit verre. Le présent document est applicable aux verres PV utilisés dans les modules PV, y compris le verre imprimé ultra transparent, le verre revêtu d’une couche antireflet, le verre revêtu d’oxyde conducteur transparent (TCO) et les autres types de verres PV utilisés dans les modules PV. Ces méthodes d’essai sont conçues pour fournir des données reproductibles appropriées à des fins de comparaison des résultats fournis par différents laboratoires ou à différentes périodes de temps par le même laboratoire et à des fins de comparaison des données obtenues pour les différents verres PV.

Metode za merjenje fotonapetostnega (PV) stekla - 2. del: Merjenje transmitance in reflektance

Ta del standarda IEC 62805 določa metode za merjenje transmitance in reflektance stekla, ki se uporablja za fotonapetostne module, ter podaja navodila za izračun efektivne polkrožne transmitance in reflektance tega stekla.
Ta dokument se uporablja za fotonapetostno steklo, ki se uporablja za fotonapetostne module, vključno z ultraprozornim ornamentnim steklom, steklom z antireflektivnim (AR) premazom, prosojnim prevodnim steklom z oksidovim premazom (TCO) in drugimi vrstami fotonapetostnega stekla, ki se uporabljajo za fotonapetostne module.
Te preskusne metode so zasnovane za zagotavljanje ponovljivih podatkov, ki so primerni za primerjavo rezultatov med laboratoriji ali ob različnih časih v istem laboratoriju in za primerjavo podatkov, pridobljenih o različnih fotonapetostnih steklih.
Te preskusne metode so se izkazale kot uporabne za steklo z odsevnimi in razpršilnimi optičnimi lastnostmi.

General Information

Status
Published
Publication Date
09-Nov-2017
Current Stage
6060 - Document made available
Due Date
10-Nov-2017
Completion Date
10-Nov-2017

Buy Standard

Standard
EN 62805-2:2018
English language
15 pages
sale 10% off
Preview
sale 10% off
Preview

e-Library read for
1 day

Standards Content (sample)

SLOVENSKI STANDARD
SIST EN 62805-2:2018
01-januar-2018

Metode za merjenje fotonapetostnega (PV) stekla - 2. del: Merjenje transmitance in

reflektance

Method for measuring photovoltaic (PV) glass - Part 2: Measurement of transmittance

and reflectance
Ta slovenski standard je istoveten z: EN 62805-2:2017
ICS:
27.160 6RQþQDHQHUJLMD Solar energy engineering
SIST EN 62805-2:2018 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN 62805-2:2018
---------------------- Page: 2 ----------------------
SIST EN 62805-2:2018
EUROPEAN STANDARD EN 62805-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2017
ICS 27.160
English Version
Method for measuring photovoltaic (PV) glass - Part 2:
Measurement of transmittance and reflectance
(IEC 62805-2:2017)

Méthode de mesure du verre photovoltaïque (PV) - Partie 2: Verfahren für die Messung von photovoltaischem (PV) Glas

Mesurage du facteur de transmission et du facteur de - Teil 2: Messung von Transmissionsgrad und

réflexion Reflexionsgrad
(IEC 62805-2:2017) (IEC 62805-2:2017)

This European Standard was approved by CENELEC on 2017-09-21. CENELEC members are bound to comply with the CEN/CENELEC

Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC

Management Centre or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation

under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the

same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,

Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,

Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden,

Switzerland, Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2017 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN 62805-2:2017 E
---------------------- Page: 3 ----------------------
SIST EN 62805-2:2018
EN 62805-2:2017
European foreword

The text of document 82/1298/FDIS, future edition 1 of IEC 62805-2, prepared by IEC/TC 82 “Solar

photovoltaic energy systems" was submitted to the IEC-CENELEC parallel vote and approved by

CENELEC as EN 62805-2:2017.
The following dates are fixed:
(dop) 2018-06-21
• latest date by which the document has to be
implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2020-09-21
standards conflicting with the
document have to be withdrawn

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.

Endorsement notice

The text of the International Standard IEC 62805-2:2017 was approved by CENELEC as a European

Standard without any modification.
---------------------- Page: 4 ----------------------
SIST EN 62805-2:2018
EN 62805-2:2017
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

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.

NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod), the relevant

EN/HD applies.

NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here:

www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60904-3 2016 Photovoltaic devices - Part 3: EN 60904-3 2016
Measurement principles for terrestrial
photovoltaic (PV) solar devices with
reference spectral irradiance data
IEC 62788-1-4 - Measurement procedures for materials EN 62788-1-4 -
used in photovoltaic modules - Part 1-4:
Encapsulants - Measurement of optical
transmittance and calculation of the solar-
weighted photon transmittance, yellowness
index, and UV cut-off frequency
IEC 62805-1 2017 Method for measuring photovoltaic (PV) EN 62805-1 2017
glass - Part 1: Measurement of total haze
and spectral distribution of haze
ISO 9050 - Glass in building_- Determination of light - -
transmittance, solar direct transmittance,
total solar energy transmittance, ultraviolet
transmittance and related glazing factors
---------------------- Page: 5 ----------------------
SIST EN 62805-2:2018
---------------------- Page: 6 ----------------------
SIST EN 62805-2:2018
IEC 62805-2
Edition 1.0 2017-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Method for measuring photovoltaic (PV) glass –
Part 2: Measurement of transmittance and reflectance
Méthode de mesure du verre photovoltaïque (PV) –
Partie 2: Mesurage du facteur de transmission et du facteur de réflexion
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 27.160 ISBN 978-2-8322-4721-1

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: 7 ----------------------
SIST EN 62805-2:2018
– 2 – IEC 62805-2:2017 © IEC 2017
CONTENTS

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

INTRODUCTION ..................................................................................................................... 5

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

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

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

4 Apparatus ........................................................................................................................ 7

4.1 General ................................................................................................................... 7

4.2 Performance of test instrument ............................................................................... 7

5 Test specimens and reference standards ......................................................................... 7

5.1 Test specimens ....................................................................................................... 7

5.2 Reference standard ................................................................................................ 7

6 Conditioning .................................................................................................................... 7

7 Procedure ........................................................................................................................ 8

7.1 General ................................................................................................................... 8

7.2 Measurement of spectral hemispherical transmittance ............................................ 8

7.2.1 Instrument calibration ...................................................................................... 8

7.2.2 Sample measurement ...................................................................................... 8

7.3 Measurement of spectral hemispherical reflectance ................................................ 8

7.3.1 Instrument calibration ...................................................................................... 8

7.3.2 Sample measurement ...................................................................................... 9

8 Calculation and expression of results ............................................................................ 10

8.1 Effective hemispherical transmittance of photon irradiance ................................... 10

8.2 Effective hemispherical reflectance of photon irradiance ....................................... 10

9 Test report ..................................................................................................................... 11

Bibliography .......................................................................................................................... 12

Figure 1 – Schematic of the integrating sphere for reflectance measurement .......................... 9

---------------------- Page: 8 ----------------------
SIST EN 62805-2:2018
IEC 62805-2:2017 © IEC 2017 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
METHOD FOR MEASURING PHOTOVOLTAIC (PV) GLASS –
Part 2: Measurement of transmittance and reflectance
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 62805-2 has been prepared by IEC technical committee 82: Solar

photovoltaic energy systems.
The text of this standard is based on the following documents:
FDIS Report on voting
82/1298/FDIS 82/1322/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 62805, published under the general title Method for measuring

photovoltaic (PV) glass, can be found on the IEC website.
---------------------- Page: 9 ----------------------
SIST EN 62805-2:2018
– 4 – IEC 62805-2:2017 © IEC 2017

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: 10 ----------------------
SIST EN 62805-2:2018
IEC 62805-2:2017 © IEC 2017 – 5 –
INTRODUCTION

This document differentiates from the other standards related to transmittance and reflectance

test as follows:

• the scope of this document is restricted to transmittance and reflectance measurement for

PV glass,

• the wavelength range is typically from 280 nm to 1 250 nm which is related to the spectral

response of common solar cells,

• in order to harmonize the calculation of the transmittance and reflectance of PV glass, the

photon irradiance was used instead of the spectral solar irradiance,

• apparatus conditions such as the integrating sphere type and diameter are specified.

This part of IEC 62805 establishes IEC requirements for providing procedures and calculation

methods for measuring the transmittance and reflectance of glass used in photovoltaic (PV)

modules.

Types of PV glass include ultra-clear patterned glass, anti-reflective coated glass, transparent

conductive oxide (TCO) glass and other kind of glass used in PV modules. With the rapid

growth of the global PV industry, the amount of PV glass being used has increased

tremendously. The optical properties including t
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.