IEC 63119-1:2025

IEC 63119-1 ®
Edition 2.0 2025-07
INTERNATIONAL
STANDARD
REDLINE VERSION
Information exchange for electric vehicle charging roaming service –
Part 1: General
ICS 43.120; 29.130.20; 35.240.01 ISBN 978-2-8327-0576-6
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CONTENTS
FOREWORD . 2
1 Scope . 1
2 Normative references . 5
3 Terms and definitions . 5
4 General description for roaming service models . 6
4.1 General . 8
4.2 System architecture . 11
4.3 Communication interfaces . 11
5 Classification of roaming service models – Roaming modes . 14
6 Communication – Protocol stack . 14
7 Security and privacy . 15
7.1 General requirements . 15
7.2 Authentication and authorization . 15
7.3 Data transfer security . 15
8 Privacy mechanisms . 15
Bibliography . 17

Figure 1 – Overview of roaming and relevant technologies . 10
Figure 2 – Overview of system architecture . 11
Figure 3 – Overview of EV services and communication interfaces . 13
Figure 4 – Overview of EV roaming classification . 14

Table 1 – Network communication protocols . 15

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
Information exchange for electric vehicle charging roaming service -
Part 1: General
FOREWORD
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This redline version of the official IEC Standard allows the user to identify the changes made
to the previous edition IEC 63119-1:2019. A vertical bar appears in the margin wherever a
change has been made. Additions are in green text, deletions are in strikethrough red text.

IEC 63119-1 has been prepared by IEC technical committee 69: Electrical power/energy
systems for electrically propelled road vehicles and industrial trucks. It is an International
Standard.
This second edition cancels and replaces the first edition published in 2019.
This edition includes the following significant technical changes with respect to the previous
edition:
a) the scope is expanded to include differentiation between home and visited service provider
roles and adds an explicit definition of roaming entity;
b) adds definitions for "home charging service provider (home-CSP)", "visited charging station
operator (visited-CSO)", and "charging detail record (CDR)", and expands related terms
such as "service" and "roaming entity";
c) introduces abbreviation variants for "home-CSP" and "visited-CSO" in the terminology,
aligning with North American and European conventions;
d) updates the communication protocol stack by adopting a newer TLS version (upgraded from
1.2 to 1.3);
e) system architecture and communication interfaces include detailed interactions between
home-CSP and visited-CSO;
f) adds a definition for "service" to cover a broader range of applications such as parking and
reservation management;
g) adds a distinction between "charging detail record (CDR)" and "service detail record (SDR)"
and clarifies their relationship in the terminology;
h) enhances the description of user credential transfer methods in communication interfaces
with greater diversity;
i) enhances the description of the mixed mode in the classification of roaming service models,
emphasizing improved user experience through faster response times.
The text of this International Standard is based on the following documents:
Draft Report on voting
69/1050/FDIS 69/1063/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications.
A list of all parts in the IEC 63119 series, published under the general title Information exchange
for electric vehicle charging roaming service, can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn, or
• revised.
1 Scope
This part of IEC 63119 establishes a basis for the other parts of IEC 63119, specifying the terms
and definitions, general description of the system model, classification, information exchange
and security mechanisms for roaming between EV charge charging service providers (CSPs),
charging station operators (CSOs) and clearing house platforms through roaming endpoints. It
provides an overview and describes the general requirements of the EV roaming service system.
The IEC 63119 series is applicable to high-level communication involved in information
exchange/interaction between different CSPs, as well as between a CSP and a CSO with or
without a clearing house platform through the roaming endpoint.
The IEC 63119 series does not specify the information exchange, either between the charging
station (CS) and the charging station operator (CSO), or between the EV and the CS.
2 Normative references
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.
RFC 5246, The Transport Layer Security (TLS) Protocol Version 1.2
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following
addresses:
• IEC Electropedia: available at https://www.electropedia.org/
• ISO Online browsing platform: available at https://www.iso.org/obp
3.1
electric vehicle
EV
electric road vehicle
vehicle propelled by an electric motor drawing current from a rechargeable storage battery or
from other portable energy storage devices (rechargeable, using energy from a source of the
vehicle such as a residential or public electric service), which is manufactured primarily for use
on public streets, roads or highways
[SOURCE: IEC 61851-1:2017, 3.4.1, modified – The definition has been expanded and the note
to entry has been deleted.]
3.2
service
suite of functions provided by
...