oSIST prEN ISO 15118-2:2025

Road vehicles - Vehicle-to-Grid Communication Interface - Part 2: Network and application protocol requirements (ISO/DIS 15118-2:2025)

ISO 15118-2:2014 specifies the communication between battery electric vehicles (BEV) or plug-in hybrid electric vehicles (PHEV) and the Electric Vehicle Supply Equipment. The application layer message set defined in ISO 15118-2:2014 is designed to support the energy transfer from an EVSE to an EV. ISO 15118-1 contains additional use case elements describing the bidirectional energy transfer. The implementation of these use cases requires enhancements of the application layer message set defined herein.
The purpose of ISO 15118-2:2014 is to detail the communication between an EV (BEV or a PHEV) and an EVSE. Aspects are specified to detect a vehicle in a communication network and enable an Internet Protocol (IP) based communication between EVCC and SECC.
ISO 15118-2:2014 defines messages, data model, XML/EXI based data representation format, usage of V2GTP, TLS, TCP and IPv6. In addition, it describes how data link layer services can be accessed from a layer 3 perspective. The Data Link Layer and Physical Layer functionality is described in ISO 15118-3.

Straßenfahrzeuge - Kommunikationsschnittstelle zwischen Fahrzeug und Ladestation - Teil 2: Anforderungen an das Netzwerk- und Anwendungsprotokoll (ISO/DIS 15118-2:2025)

Véhicules routiers - Interface de communication entre véhicule et réseau électrique - Partie 2: Exigences du protocole d'application et du réseau (ISO/DIS 15118-2:2025)

Le présent document spécifie la communication entre les véhicules électriques à batterie (VEB) ou les véhicules électriques hybrides rechargeables (VEHR) et l'infrastructure de recharge pour véhicules électriques. L'ensemble de messages de la couche application défini dans le présent document est conçu pour prendre en charge le transfert d'énergie entre une IRVE et un VE. L'ISO 15118-1 contient des éléments de cas d'utilisation supplémentaires (ID des éléments de cas d'utilisation de la Partie 1 : F4 et F5) décrivant le transfert d'énergie bidirectionnel. L'implémentation de ces cas d'utilisation nécessite des améliorations de l'ensemble de messages de la couche application défini dans le présent document. Les définitions de ces exigences supplémentaires feront l'objet de la prochaine révision du présent document.
Le présent document a pour but de décrire de manière détaillée la communication entre un VE (VEB ou VEHR) et une IRVE. Les aspects spécifiés permettent de détecter un véhicule dans un réseau de communication, et de permettre une communication basée sur le protocole Internet (IP) entre le contrôleur de communication du véhicule électrique (EVCC) et le contrôleur de communication de l'infrastructure de recharge (SECC).
Le présent document définit les messages, le modèle de données, le format de représentation de données basé sur XML/EXI, l'utilisation de V2GTP, TLS, TCP et IPv6. De plus, il décrit comment accéder aux services de la couche liaison de données à partir de la couche 3. La fonctionnalité de la couche liaison de données et de la couche physique est décrite dans l'ISO 15118-3.

Cestna vozila - Komunikacijski vmesnik med vozilom in omrežjem - 2. del: Zahteve za protokol omrežja in uporabe (ISO/DIS 15118-2:2025)

General Information

• Status: Not Published
• Public Enquiry End Date: 30-Oct-2025
• ICS: 35.100.05 - Multilayer applications
• ICS: 43.040.15 - Car informatics. On board computer systems
• Technical Committee: CEV - Electric passenger and commercial vehicles
• Current Stage: 4020 - Public enquire (PE) (Adopted Project)
• Start Date: 04-Sep-2025
• Due Date: 22-Jan-2026
• Directive: 2023/1804 - Regulation (EU) 2023/1804 of the European Parliament and of the Council of 13 September 2023 on the deployment of alternative fuels infrastructure, and repealing Directive 2014/94/EU
• Mandate: M/581 - Standardisation Request as regards communication exchange, electricity, and hydrogen supply for road, maritime transport and inland navigation in support of Directive 2014/94/EU and its planned revision under the ‘Fit for 55’package
• Ref Project: prEN ISO 15118-2 - Road vehicles - Vehicle-to-Grid Communication Interface - Part 2: Network and application protocol requirements (ISO/DIS 15118-2:2025)

Relations

• Revises: SIST EN ISO 15118-2:2016 - Road vehicles - Vehicle-to-grid communication Interface - Part 2: Network and application protocol requirements (ISO 15118-2:2014)
• Effective Date: 29-Jan-2025

Standards Content (Sample)

SLOVENSKI STANDARD
01-oktober-2025
Cestna vozila - Komunikacijski vmesnik med vozilom in omrežjem - 2. del: Zahteve
za protokol omrežja in uporabe (ISO/DIS 15118-2:2025)
Road vehicles - Vehicle-to-Grid Communication Interface - Part 2: Network and
application protocol requirements (ISO/DIS 15118-2:2025)
Straßenfahrzeuge - Kommunikationsschnittstelle zwischen Fahrzeug und Ladestation -
Teil 2: Anforderungen an das Netzwerk- und Anwendungsprotokoll (ISO/DIS 15118-
2:2025)
Véhicules routiers - Interface de communication entre véhicule et réseau électrique -
Partie 2: Exigences du protocole d'application et du réseau (ISO/DIS 15118-2:2025)
Ta slovenski standard je istoveten z: prEN ISO 15118-2
ICS:
35.100.05 Večslojne uporabniške Multilayer applications
rešitve
43.040.15 Avtomobilska informatika. Car informatics. On board
Vgrajeni računalniški sistemi computer systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
International
Standard
ISO/DIS 15118-2
ISO/TC 22/SC 31
Road vehicles — Vehicle-to-Grid
Secretariat: DIN
Communication Interface —
Voting begins on:
Part 2: 2025-08-26
Network and application protocol
Voting terminates on:
2025-11-18
requirements
Véhicules routiers — Interface de communication entre véhicule
et réseau électrique —
Partie 2: Exigences du protocole d'application et du réseau
ICS: 43.120
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
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USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS.
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION.
Reference number
ISO/DIS 15118-2:2025(en)
DRAFT
ISO/DIS 15118-2:2025(en)
International
Standard
ISO/DIS 15118-2
ISO/TC 22/SC 31
Road vehicles — Vehicle-to-Grid
Secretariat: DIN
Communication Interface —
Voting begins on:
Part 2:
Network and application protocol
Voting terminates on:
requirements
Véhicules routiers — Interface de communication entre véhicule
et réseau électrique —
Partie 2: Exigences du protocole d'application et du réseau
ICS: ISO ics
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2025
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
BE CONSIDERED IN THE LIGHT OF THEIR
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
or ISO’s member body in the country of the requester.
NATIONAL REGULATIONS.
ISO copyright office
RECIPIENTS OF THIS DRAFT ARE INVITED
CP 401 • Ch. de Blandonnet 8
TO SUBMIT, WITH THEIR COMMENTS,
CH-1214 Vernier, Geneva
NOTIFICATION OF ANY RELEVANT PATENT
Phone: [phone]
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION.
Email: [e-mail]
Website: www.iso.org
Published in Switzerland Reference number
ISO/DIS 15118-2:2025(en)
ii
ISO/DIS 15118-2:2025(en)
ISO/DIS 15118-2:2025(E)
Contents
Foreword . vii
Introduction . ix
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 3
4 Abbreviated terms . 7
5 Conventions . 8
5.1 Definition of OSI based services . 8
5.2 Requirement structure . 8
5.3 Usage of RFC references. 9
5.4 Notation used for XML schema diagrams . 9
6 Document overview . 9
7 Basic requirements for V2G communication . 11
7.1 General information . 11
7.2 Service primitive concept of OSI layered architecture . 11
7.2.1 Overview . 11
7.2.2 Syntax of service primitives . 12
7.3 Security concept . 12
7.3.1 Call flows (flow charts) . 12
7.3.2 Certificate and key management . 16
7.3.3 Number of root certificates and root validity, certificate depth and size . 18
7.3.4 Support and application of TLS . 19
7.4 V2G communication states and data link handling . 21
7.5 Data link layer . 26
7.6 Network layer . 26
7.6.1 General . 26
7.6.2 Applicable RFCs and limitations and protocol parameter settings . 26
7.6.3 IP addressing . 27
7.7 Transport layer . 28
7.7.1 Transmission control protocol (TCP) . 28
7.7.2 User datagram protocol (UDP) . 29
7.7.3 Transport layer security (TLS) . 29
7.8 V2G transfer protocol . 32
7.8.1 General . 32
7.8.2 Supported ports . 33
7.8.3 Protocol data unit . 34
7.9 Presentation layer . 37
7.9.1 XML and efficient XML interchange (EXI) . 37
7.9.2 Message security . 40
7.10 Application layer . 47
7.10.1 SECC discovery protocol . 47
7.10.2 Vehicle to grid application layer messages . 52
7.10.3 Application layer service primitives . 52
8 Application layer messages . 56
8.1 General . 56
8.2 Protocol handshake definition . 57
8.2.1 Handshake sequence . 57

iii
ISO/DIS 15118-2:2025(en)
ISO/DIS 15118-2:2025(E)
8.2.2 Message definition supportedAppProtocolReq and supportedAppProtocolRes . 58
8.2.3 Semantics description supportedAppProtocol messages . 59
8.2.4 Message examples . 60
8.3 V2G message definition . 61
8.3.1 General . 61
8.3.2 Message definition . 61
8.3.3 Message header definition . 62
8.3.4 Message body definition . 63
8.4 V2G communication session and BodyElement definitions . 64
8.4.1 General . 64
8.4.2 Session handling . 65
8.4.3 Common messages . 68
8.4.4 AC messages . 99
8.4.5 DC messages . 102
8.5 Complex data types . 111
8.5.1 Overview . 111
8.5.2 Common .
...