EN 61724-1:2017

SLOVENSKI STANDARD
01-julij-2017
1DGRPHãþD
SIST EN 61724:2001
Zmogljivost fotonapetostnega sistema - 1. del: Spremljanje in nadzorovanje
Photovoltaic system performance - Part 1: Monitoring
Ta slovenski standard je istoveten z: EN 61724-1:2017
ICS:
27.160 6RQþQDHQHUJLMD Solar energy engineering
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 61724-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2017
ICS 27.180 Supersedes EN 61724:1998 (partially)
English Version
Photovoltaic system performance - Part 1: Monitoring
(IEC 61724-1:2017)
Performance d'un système photovoltaïque - Partie 1: Betriebsverhalten von Photovoltaik-Systemen - Teil 1:
Surveillance Überwachung
(IEC 61724-1:2017) (IEC 61724-1:2017)
This European Standard was approved by CENELEC on 2017-04-07. 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 61724-1:2017 E
European foreword
The text of document 82/1215/FDIS, future edition 1 of IEC 61724-1, prepared by IEC/TC 82 “Solar
photovoltaic energy systems" was submitted to the IEC-CENELEC parallel vote and approved by
CENELEC as EN 61724-1:2017.
The following dates are fixed:
(dop) 2018-01-07
• 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) 2020-04-07
standards conflicting with the
document have to be withdrawn
This document supersedes EN 61724:1998 (partially).

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 61724-1:2017 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, in whole or in part, are normatively referenced in this document and are
indispensable for its application. 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 60050-131 -  International Electrotechnical Vocabulary - -
(IEV) -- Part 131: Circuit theory
IEC 60904-2 -  Photovoltaic devices - Part 2: EN 60904-2 -
Requirements for photovoltaic reference
devices
IEC 60904-3 -  Photovoltaic devices - Part 3: EN 60904-3 -
Measurement principles for terrestrial
photovoltaic (PV) solar devices with
reference spectral irradiance data
IEC 60904-5 -  Photovoltaic devices -- Part 5: EN 60904-5 -
Determination of the equivalent cell
temperature (ECT) of photovoltaic (PV)
devices by the open-circuit voltage method
IEC 60904-10 -  Photovoltaic devices -- Part 10: Methods of EN 60904-10 -
linearity measurement
IEC 61557-12 -  Electrical safety in low voltage distribution EN 61557-12 -
systems up to 1 000 V a.c. and 1 500 V
d.c. - Equipment for testing, measuring or
monitoring of protective measures -- Part
12: Performance measuring and
monitoring devices (PMD)
IEC 62053-21 -  Electricity metering equipment (a.c.) - EN 62053-21 -
Particular requirements -- Part 21: Static
meters for active energy (classes 1 and 2)
IEC 62053-22 -  Electricity metering equipment (a.c.) - EN 62053-22 -
Particular requirements -- Part 22: Static
meters for active energy (classes 0,2 S
and 0,5 S)
IEC 62670-3 -  EN 62670-3 -
IEC 62817 2014 Solar trackers for photovoltaic systems - EN 62817 2015
Design qualification
ISO 9060 -  Solar energy; specification and - -
classification of instruments for measuring
hemispherical solar and direct solar
radiation
ISO 9488 -  Solar energy - Vocabulary EN ISO 9488 -
ISO 9846 -  Solar energy -- Calibration of a - -
pyranometer using a pyrheliometer
ISO 9847 -  Solar energy - Calibration of field - -
pyranometers by comparison to a
reference pyranometer
IEC/TS 61836 -  Solar photovoltaic energy systems - CLC/TS 61836 -
Terms, definitions and symbols
ISO/IEC Guide 98-1 -  Uncertainty of measurement – Part 1: - -
Introduction to the expression of
uncertainty in measurement
ISO/IEC Guide 98-3 -  Uncertainty of measurement -- Part 3: - -
Guide to the expression of uncertainty in
measurement (GUM:1995)
ASTM G 183 -  Standard Practice for Field Use of - -
Pyranometers, Pyrheliometers and UV
Radiometers
WMO No 8 -  Guide to meteorological instruments and - -
methods of observation
IEC 61724-1 ®
Edition 1.0 2017-03
INTERNATIONAL
STANDARD
Photovoltaic system performance –

Part 1: Monitoring
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 27.160 ISBN 978-2-8322-3988-9

– 2 – IEC 61724-1:2017 © IEC 2017
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 9
2 Normative references . 9
3 Terms and definitions . 10
4 Monitoring system classification . 13
5 General . 13
5.1 Measurement uncertainty . 13
5.2 Calibration . 14
5.3 Repeated elements . 14
5.4 Power consumption. 14
5.5 Documentation . 14
5.6 Inspection . 14
6 Data acquisition timing and reporting . 15
6.1 Sampling, recording, and reporting . 15
6.2 Timestamps . 16
7 Measured parameters . 16
7.1 General requirements . 16
7.2 Irradiance . 20
7.2.1 On-site irradiance measurement . 20
7.2.2 Satellite remote sensing of irradiance . 25
7.3 Environmental factors . 26
7.3.1 PV module temperature . 26
7.3.2 Ambient air temperature . 27
7.3.3 Wind speed and direction . 27
7.3.4 Soiling ratio . 28
7.3.5 Rainfall . 30
7.3.6 Snow . 30
7.3.7 Humidity . 30
7.4 Tracker system . 31
7.4.1 Single-axis trackers . 31
7.4.2 Dual-axis trackers for >20x systems . 31
7.5 Electrical measurements . 31
7.6 External system requirements . 32
8 Data processing and quality check . 32
8.1 Daylight hours . 32
8.2 Quality check . 33
8.2.1 Removing invalid readings . 33
8.2.2 Treatment of missing data . 33
9 Calculated parameters . 33
9.1 Overview . 33
9.2 Summations . 34
9.3 Irradiation . 34
9.4 Electrical energy . 35
9.4.1 General . 35
9.4.2 DC output energy . 35

IEC 61724-1:2017 © IEC 2017 – 3 –
9.4.3 AC output energy . 35
9.5 Array power rating . 35
9.5.1 DC power rating. 35
9.5.2 AC power rating . 35
9.6 Yields . 35
9.6.1 General . 35
9.6.2 PV array energy yield . 36
9.6.3 Final system yield . 36
9.6.4 Reference yield . 36
9.7 Yield losses . 36
9.7.1 General . 36
9.7.2 Array capture loss . 36
9.7.3 Balance of systems (BOS) loss .
...