EN IEC 60891:2021

SLOVENSKI STANDARD
01-februar-2022
Nadomešča:
SIST EN 60891:2011
Fotonapetostne naprave - Postopki za temperaturno in sevalno korekcijo
izmerjenih karakteristik I-U
Photovoltaic devices - Procedures for temperature and irradiance corrections to
measured I-V characteristics
Verfahren zur Umrechung von gemessenen Strom-Spannungs-Kennlinien von
photovoltaischen Bauelementen auf andere Temperaturen und Bestrahlungsstärken
Dispositifs photovoltaïques - Procédures pour les corrections en fonction de la
température et de l'éclairement à appliquer aux caractéristiques I-V mesurées
Ta slovenski standard je istoveten z: EN IEC 60891:2021
ICS:
27.160 Sončna energija Solar energy engineering
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 60891

NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2021
ICS 27.160 Supersedes EN 60891:2010 and all of its amendments
and corrigenda (if any)
English Version
Photovoltaic devices - Procedures for temperature and
irradiance corrections to measured I-V characteristics
(IEC 60891:2021)
Dispositifs photovoltaïques - Procédures pour les Verfahren zur Umrechnung von gemessenen Strom-
corrections en fonction de la température et de l'éclairement Spannungs-Kennlinien von photovoltaischen Bauelementen
à appliquer aux caractéristiques I-V mesurées auf andere Temperaturen und Bestrahlungsstärken
(IEC 60891:2021) (IEC 60891:2021)
This European Standard was approved by CENELEC on 2021-12-01. 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, 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: Rue de la Science 23, B-1040 Brussels
© 2021 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60891:2021 E
European foreword
The text of document 82/1936/FDIS, future edition 3 of IEC 60891, prepared by IEC/TC 82 “Solar
photovoltaic energy systems” was submitted to the IEC-CENELEC parallel vote and approved by
CENELEC as EN IEC 60891:2021.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2022–09–01
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2024–12–01
document have to be withdrawn
This document supersedes EN 60891:2010 and all of its amendments and corrigenda (if any).
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.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 60891:2021 was approved by CENELEC as a European
Standard without any modification.
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 Where 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 60904-1 - Photovoltaic devices - Part 1: EN IEC 60904-1 -
Measurement of photovoltaic current-
voltage characteristics
IEC/TS 60904-1-2  Photovoltaic devices - Part 1–2:
Measurement of current-voltage
characteristics of bifacial photovoltaic (PV)
devices
IEC 60904-2 - Photovoltaic devices - Part 2: EN 60904-2 -
Requirements for photovoltaic reference
devices
IEC 60904-7 - Photovoltaic devices - Part 7: Computation EN IEC 60904-7 -
of the spectral mismatch correction for
measurements of photovoltaic devices
IEC 60904-8 - Photovoltaic devices - Part 8: EN 60904-8 -
Measurement of spectral responsivity of a
photovoltaic (PV) device
IEC 60904-9 - Photovoltaic devices - Part 9: Classification EN IEC 60904-9 -
of solar simulator characteristics
IEC 60904-10 2020 Photovoltaic devices - Part 10: Methods of EN IEC 60904-10 2020
linear dependence and linearity
measurements
IEC 61215-2 - Terrestrial photovoltaic (PV) modules - EN IEC 61215-2 -
Design qualification and type approval -
Part 2: Test procedures
IEC/TS 61836 - Solar photovoltaic energy systems - - -
Terms, definitions and symbols

IEC 60891 ®
Edition 3.0 2021-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Photovoltaic devices – Procedures for temperature and irradiance corrections

to measured I-V characteristics

Dispositifs photovoltaïques – Procédures pour les corrections en fonction de la

température et de l'éclairement à appliquer aux caractéristiques I-V mesurées

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 27.160 ISBN 978-2-8322-1036-0

– 2 – IEC 60891:2021 © IEC 2021
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions, symbols and abbreviated terms . 7
4 Correction procedures . 8
4.1 General . 8
4.2 Correction procedure 1 . 11
4.3 Correction procedure 2 . 12
4.4 Correction procedure 3 . 14
4.4.1 General . 14
4.4.2 Correction for the irradiance and temperature from two measured I-V
curves . 14
4.4.3 Correction to various irradiances and temperatures from three I-V
curves . 17
4.4.4 Correction to various irradiances and temperatures from four measured
I-V curves . 17
4.5 Correction procedure 4 . 18
5 Determination of temperature coefficients . 20
5.1 General . 20
5.2 Apparatus . 20
5.3 Procedure in natural or steady-state simulated sunlight . 22
5.4 Procedure with a pulsed solar simulator . 23
5.5 Calculation of temperature coefficients . 23
6 Determination of internal series resistance R and R′ . 24
S S
6.1 General . 24
6.2 Determination of R in correction procedures 1 and 4 . 25
S
6.3 Determination of B and B in correction procedure 2 . 27
1 2
6.4 Determination of R′ in correction procedure 2 . 28
S
6.5 Determination of R in correction procedure 4 . 30
S
7 Determination of the curve correction factor κ and κ′ . 31
7.1 General . 31
7.2 Procedure . 31
8 Reporting . 32
Annex A (informative) Alternative procedures for series resistance determination . 34
A.1 General . 34
A.2 Differential resistance at V against inverse irradiance method . 34
OC
Bibliography . 35

Figure 1 – Example of the correction of the I-V characteristics by formulae (10) and
(11) . 16
Figure 2 – Schematic diagram of the relation of G and T which can be chosen in the
3 3
simultaneous correction for irradiance and temperature, for a fixed set of T , G , T ,
1 1 2
and G by formulae (12) and (13) . 16
IEC 60891:2021 © IEC 2021 – 3 –
Figure 3 – Schematic diagram of the processes for correcting the I-V characteristics to
various ranges of irradiance and temperature based on three measured
characteristics . 17
Figure 4 – Schematic diagram of the processes for correcting the I-V characteristics to
various ranges of irradiance and temperature based on four measured characteristics . 18
Figure 5 – Example positions for measuring the temperature of the test module behind
the cells . 21
Figure 6 – Determination of internal series resistance . 26
Figure 7 – Determination of internal series resistance when the corrected I-V

characteristics intersect . 27
Figure 8 – Determination of irradiance correction factors B and B and internal series
1 2
resistance, R′ . 29
S
Figure 9 – Determination of internal series resistance of a PV module from a single I-V
curve . 31
Figure 10 – Determination of curve correction factor . 32
Figure A.1 – Determination of internal series resistance . 34

Table 1 – Overview of correction procedures for irradiance corrections (i.e. T = T ) . 9
1 2
Table 2 – Overview of correction procedures for temperature corrections (i.e. G = G ) . 10
1 2
– 4 – IEC 60891:2021 © IEC 2021
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
PHOTOVOLTAIC DEVICES – PROCEDURES FOR TEMPERATURE AND
IRRADIANCE CORRECTIONS TO MEASURED I-V CHARACTERISTICS

FOREWORD
1) The Inter
...