SIST EN IEC 62909-1:2025
(Main)Bi-directional grid-connected power converters - Part 1: General and safety requirements (IEC 62909-1:2025)
Bi-directional grid-connected power converters - Part 1: General and safety requirements (IEC 62909-1:2025)
IEC 62909-1:2025 specifies general and safety aspects of bi-directional grid-connected power converters (GCPC), consisting of a grid-side inverter with two or more types of DC power ports on the application side with system voltages not exceeding 1 000 V AC or 1 500 V DC.
This document can also be used for the special case of a multiple DC power port GCPC used in an application requiring only one DC power port.
This document considers general aspects such as terminology, specifications, performance, system architecture, as well as safety requirements.
This document does not cover:
- uninterruptible power supply (UPS) systems, which fall under the scope of the IEC 62040 series,
- power conversion equipment for use in photovoltaic systems, which fall under the scope of the IEC 62109 series, and
- bi-directional power converters to charge or discharge the batteries located within electric vehicles or in the charging station, which fall under the scope of the IEC 61851 series.
NOTE 1 The external system (e.g. energy management system, utility operations system) is not defined in this document.
NOTE 2 The power converter sub-system case for use in electrical energy storage systems is currently covered by this document but will be covered by the IEC 63285 series (under preparation).
NOTE 3 Annex A provides examples of GCPCs. These examples contain GCPCs covered and not covered by this document.
This second edition includes the following significant technical changes with respect to the previous edition:
a) the title has been changed by adding the wording "and safety";
b) the scope has been changed in order to clarify the bi-directional grid-connected power converters (GCPCs) covered by this document.
Bidirektionale netzgekoppelte Leistungsumrichter – Teil 1: Allgemeine- und Sicherheitsanforderungen (IEC 62909-1:2025)
Convertisseurs de puissance connectés aux réseaux bidirectionnels - Partie 1: Exigences générales et de sécurité (IEC 62909-1:2025)
L'IEC 62909-1:2025 spécifie les aspects généraux et les aspects de sécurité des convertisseurs de puissance connectés aux réseaux bidirectionnels (GCPC), composés d'un onduleur côté réseau avec plusieurs types d'accès d'alimentation en courant continu côté application avec des tensions systèmes qui ne dépassent pas 1 000 V en courant alternatif ou 1 500 V en courant continu.
Le présent document peut également être utilisé dans le cas particulier qui consiste à utiliser un GCPC équipé de plusieurs accès d'alimentation en courant continu dans une application qui ne nécessite qu'un seul accès d'alimentation en courant continu.
Le présent document traite des aspects généraux tels que la terminologie, les spécifications, les performances, l'architecture système ainsi que les exigences de sécurité.
Le présent document ne couvre pas
- les systèmes d'alimentation sans interruption (ASI), qui relèvent du domaine d'application de la série IEC 62040,
- les équipements de conversion de puissance utilisés dans les systèmes photovoltaïques, qui relèvent du domaine d'application de la série IEC 62109, ni
- les convertisseurs de puissance bidirectionnels avec un seul accès utilisés pour la charge et la décharge de batteries installées dans des véhicules électriques ou dans la borne de charge, qui relèvent du domaine d'application de la série IEC 61851.
NOTE 1 Le système externe (par exemple, système de gestion de l'énergie, système d'exploitation des services publics) n'est pas défini dans le présent document.
NOTE 2 Le cas du sous-système de convertisseur de puissance utilisé dans les systèmes de stockage de l'énergie électrique est actuellement couvert par le présent document, mais il relèvera de la série IEC 63285 (en cours d’élaboration).
NOTE 3 L'Annexe A présente des exemples de GCPC. Ces exemples comprennent des GCPC couverts et des GCPC non couverts par le présent document.
Cette deuxième édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a) le titre a été modifié par l'ajout de la mention "et exigences de sécurité";
b) le domaine d'application a été modifié afin de préciser les convertisseurs de puissance connectés aux réseaux bidirectionnels (GCPC) couverts par le présent document.
Dvosmerni omrežni elektroenergetski pretvorniki - 1. del: Splošne in varnostne zahteve (IEC 62909-1:2025)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-december-2025
Dvosmerni omrežni elektroenergetski pretvorniki - 1. del: Splošne in varnostne
zahteve (IEC 62909-1:2025)
Bi-directional grid-connected power converters - Part 1: General and safety requirements
(IEC 62909-1:2025)
Bidirektionale netzgekoppelte Leistungsumrichter – Teil 1: Allgemeine- und
Sicherheitsanforderungen (IEC 62909-1:2025)
Convertisseurs de puissance connectés aux réseaux bidirectionnels - Partie 1:
Exigences générales et de sécurité (IEC 62909-1:2025)
Ta slovenski standard je istoveten z: EN IEC 62909-1:2025
ICS:
29.200 Usmerniki. Pretvorniki. Rectifiers. Convertors.
Stabilizirano električno Stabilized power supply
napajanje
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD EN IEC 62909-1
NORME EUROPÉENNE
EUROPÄISCHE NORM September 2025
ICS 29.200 Supersedes EN IEC 62909-1:2018
English Version
Bi-directional grid-connected power converters - Part 1: General
and safety requirements
(IEC 62909-1:2025)
Convertisseurs de puissance connectés aux réseaux Bidirektionale netzgekoppelte Leistungsumrichter - Teil 1:
bidirectionnels - Partie 1: Exigences générales et de Allgemeine- und Sicherheitsanforderungen
sécurité (IEC 62909-1:2025)
(IEC 62909-1:2025)
This European Standard was approved by CENELEC on 2025-08-06. 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,
Türkiye 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
© 2025 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 62909-1:2025 E
European foreword
The text of document 22E/288/FDIS, future edition 2 of IEC 62909-1, prepared by SC 22E "Stabilized
power supplies" of IEC/TC 22 "Power electronic systems and equipment" was submitted to the IEC-
CENELEC parallel vote and approved by CENELEC as EN IEC 62909-1:2025.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2026-09-30
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2028-09-30
document have to be withdrawn
This document supersedes EN IEC 62909-1:2018 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 62909-1:2025 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standard indicated:
IEC 61851 series NOTE Approved as EN IEC 61851 series
IEC 61851-23:2023 NOTE Approved as EN IEC 61851-23:— (not modified)
IEC 62040 series NOTE Approved as EN 62040 series
IEC 62040-1:2017 NOTE Approved as EN IEC 62040-1:2019 (not modified) +A11:2021
IEC 62109 series NOTE Approved as EN IEC 62109 series
IEC 62109-2:2011 NOTE Approved as EN 62109-2:2011 (not modified)
Under preparation. Stage at the time of publication: FprEN IEC 61851-23:2025.
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.cencenelec.eu.
Publication Year Title EN/HD Year
IEC 60038 (mod) 2009 IEC standard voltages EN 60038 2011
+ A1 2021 - -
IEC 60146-2 1999 Semiconductor converters - Part 2: Self- EN 60146-2 2000
commutated semiconductor converters
including direct d.c. converters
IEC 62040-3 2021 Uninterruptible power systems (UPS) - Part EN IEC 62040-3 2021
3: Method of specifying the performance
and test requirements
IEC 62109-1 2010 Safety of power converters for use in EN 62109-1 2010
photovoltaic power systems - Part 1:
General requirements
IEC 62477-1 2022 Safety requirements for power electronic EN IEC 62477-1 2023
converter systems and equipment - Part 1:
General
IEC/TS 62786-1 2023 Distributed energy resources connection - -
with the grid - Part 1: General requirements
IEC 62909-1 ®
Edition 2.0 2025-07
INTERNATIONAL
STANDARD
Bi-directional grid-connected power converters –
Part 1: General and safety requirements
ICS 29.200 ISBN 978-2-8327-0522-3
IEC 62909-1:2025-07(en)
IEC 62909-1:2025 © IEC 2025
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 General specification and performance requirements . 10
4.1 GCPC general specification . 10
4.1.1 General. 10
4.1.2 Description of GCPC and its components . 10
4.1.3 Operating modes . 11
4.1.4 Interfaces with distributed energy sources . 13
4.2 Performance requirements . 14
4.2.1 DC-connection interface . 14
4.2.2 Converter . 15
4.2.3 Grid interface – AC output to the grid . 17
4.2.4 AC output to the load under grid-independent operation . 17
5 Safety requirements . 17
5.1 General . 17
5.2 Hazard protection requirements . 17
5.3 Test requirements . 17
5.4 Information and marking requirements . 18
5.4.1 General. 18
5.4.2 Specific requirements linked to multiple source system connected to the
grid. 18
5.5 Fault-tolerance of protection for grid-interactive inverters . 18
Annex A (informative) Examples of GCPC . 19
A.1 General . 19
A.2 Examples of GCPC within the scope of this document . 19
A.3 Examples of GCPC where other standards apply . 20
Bibliography . 22
Figure 1 – Example of a GCPC structure. 11
Figure 2 – Power flow of mode I . 12
Figure 3 – Power flow of mode II . 12
Figure 4 – Power flow of mode III . 13
Figure 5 – Power flow of mode IV . 13
Figure 6 – DC-connection interface voltage range . 14
Figure A.1 – Multiport GCPC with battery, DER and CPT ports. 19
Figure A.2 – Multiport GCPC with battery and CPT ports . 19
Figure A.3 – Multiport GCPC with battery and CPT ports – Product variant of the
GCPC in Figure A.2 but cannot connect to EV . 20
Figure A.4 – Multiport GCPC with battery and CPT ports – Product variant of
Figure A.2 but cannot connect to EV and without DC/DC converter for EV . 20
IEC 62909-1:2025 © IEC 2025
Figure A.5 – Equipment in scope of IEC 61851 series: GCPC with a CPT port . 20
Figure A.6 – Equipment in scope of IEC 63285 series: GCPC with a battery port . 21
Figure A.7 – Equipment in scope of the IEC 62109 series: multiport Bi-directional PEC . 21
Table 1 – Alphabetical list of terms . 7
IEC 62909-1:2025 © IEC 2025
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
Bi-directional grid-connected power converters -
Part 1: General and safety requirements
FOREWORD
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