IEC 62805-2:2017

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
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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

– 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

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
METHOD FOR MEASURING PHOTOVOLTAIC (PV) GLASS –

Part 2: Measurement of transmittance and reflectance

FOREWORD
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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.

– 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.
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 o
...