EN ISO 15118-1:2019

Road vehicles - Vehicle to grid communication interface - Part 1: General information and use-case definition (ISO 15118-1:2019)

This document, as a basis for the other parts of the ISO 15118 series, specifies terms and definitions, general requirements and use cases for conductive and wireless HLC between the EVCC and the SECC.
This document is applicable to HLC involved in conductive and wireless power transfer technologies in the context of manual or automatic connection devices.
This document is also applicable to energy transfer either from EV supply equipment to charge the EV battery or from EV battery to EV supply equipment in order to supply energy to home, to loads or to the grid.
This document provides a general overview and a common understanding of aspects influencing identification, association, charge or discharge control and optimisation, payment, load levelling, cybersecurity and privacy. It offers an interoperable EV-EV supply equipment interface to all e-mobility actors beyond SECC.
The ISO 15118 series does not specify the vehicle internal communication between battery and other internal equipment (beside some dedicated message elements related to the energy transfer).
NOTE 1    Electric road vehicles specifically are vehicles in categories M (used for carriage of passengers) and N (used for carriage of goods) (compare ECE/TR ANS/WP.29/78 ev.2). This does not prevent vehicles in other categories from adopting the ISO 15118 series as well.
NOTE 2    This document is destined to orientate the message set of ISO 15118‑2 and ISO 15118‑20[1]. The absence of any particular use case in this document does not imply that it will not be put into practice, with the required messages.
NOTE 3    This document, ISO 15118‑2 and ISO 15118‑20 are designed to work independent of data transfer medium used. However, the ISO 15118 series is made for fitting the specified data link layers in the corresponding documents in this series.
[1] Under preparation. Stage at the time on publication: ISO/DIS 15118-20:2019.

Straßenfahrzeuge - Kommunikationsschnittstelle zwischen Fahrzeug und Ladestation - Teil 1: Allgemeine Informationen und Festlegungen der Anwendungsfälle (ISO 15118-1:2019)

Véhicules routiers - Interface de communication entre véhicule et réseau électrique - Partie 1: Informations générales et définition de cas d'utilisation (ISO 15118-1:2019)

Le présent document, qui sert de base aux autres parties de l'ISO 15118, spécifie les termes et définitions, les exigences générales et les cas d'utilisation relatifs à la communication de haut niveau, par câble ou sans fil, entre le dispositif de contrôle de communication d'un véhicule électrique (EVCC) et le dispositif de contrôle de communication d'équipement d'alimentation (SECC).
Le présent document s'applique à la communication de haut niveau impliquée dans les technologies de transfert de puissance par câble et sans fil, dans le contexte de dispositifs de connexion manuelle ou automatique.
Le présent document s'applique également au transfert d'énergie de l'infrastructure de recharge au VE pour recharger la batterie du VE ou de la batterie du VE à l'infrastructure de recharge pour VE afin de fournir de l'énergie à une maison, à des charges ou au réseau électrique.
Le présent document donne un aperçu général et une compréhension commune des aspects ayant une incidence sur l'identification, l'association, le contrôle et l'optimisation de la charge ou de la décharge, le paiement, le nivellement de la charge, la cybersécurité et le respect de la vie privée. Il propose une interface VE-infrastructure de recharge pour VE interopérable à tous les acteurs de la mobilité électrique au-delà du SECC.
La série ISO 15118 ne spécifie pas la communication interne au véhicule entre la batterie et d'autres équipements internes (en dehors de quelques éléments de message relatifs au transfert d'énergie).
NOTE 1    Les véhicules routiers électriques sont spécifiquement des véhicules de catégories M (utilisés pour le transport de passagers) et N (utilisés pour le transport de marchandises) (voir l'ECE/TR ANS/WP.29/78 ev.2). Cela n'empêche pas l'adoption de l'ISO 15118 par des véhicules appartenant à d'autres catégories.
NOTE 2    Le présent document est destiné à orienter l'ensemble de messages de ISO 15118‑2 et de l'ISO 15118‑20[1]. L'absence de tout cas d'utilisation particulier dans le présent document n'implique pas qu'elle ne doit pas être mise en œuvre, avec les messages requis.
NOTE 3    Le présent document, l'ISO 15118‑2 et l'ISO 15118‑20 sont conçues pour être applicables indépendamment du support de transfert de données utilisé. Néanmoins, cette série ISO 15118 est élaborée pour s'adapter aux couches liaison de données spécifiées dans les documents correspondants de la série.
[1] En cours de préparation. Stade au moment de la publication: ISO/DIS 15118-20:2019.

Cestna vozila - Komunikacijski vmesnik med vozilom in omrežjem - 1. del: Splošne informacije in definicija primera uporabe (ISO 15118-1:2019)

Ta dokument kot podlaga za druge dele skupine standardov ISO 15118 določa izraze in definicije, splošne zahteve in primere uporabe za kabelsko in brezžično komunikacijo na visoki ravni (HLC) med komunikacijskim krmilnikom električnega vozila (EVCC) in komunikacijskim krmilnikom opreme za napajanje (SECC). Ta dokument se uporablja za komunikacijo na visoki ravni, ki je vključena v tehnologijah kabelskega in brezžičnega prenosa moči v okviru ročnih ali avtomatskih priključnih naprav.
Ta dokument se uporablja tudi za prenos energije od opreme za napajanje električnih vozil za polnjenje akumulatorja električnega vozila ali od akumulatorja električnega vozila do opreme za napajanje električnih vozil za prenos energije v dom, obremenitve ali v omrežje.
Ta dokument podaja splošen pregled in razumevanje vidikov, ki vplivajo na identifikacijo, povezavo, nadzor in optimizacijo polnjenja ali praznjenja, plačilo, uravnavanje obremenitve, kibernetsko varnost in zasebnost. Ponuja interoperabilni vmesnik opreme za napajanje EV-EV za vse akterje e-mobilnosti, ki presega komunikacijski krmilnik opreme za napajanje.
Skupina standardov ISO 15118 ne določa notranje komunikacije v vozilu med akumulatorjem in drugo notranjo opremo (razen nekaterih namenskih elementov sporočila v zvezi s prenosom energije).
OPOMBA 1: Električna cestna vozil so zlasti vozila v kategorijah M (uporabljajo se za prevoz potnikov) in N (uporabljajo se za prevoz blaga) (primerjaj ECE/TR ANS/WP.29/78 ev.2). To ne preprečuje, da bi tudi vozila v drugih kategorijah sprejela skupino standardov ISO 15118.
OPOMBA 2: Ta dokument je namenjen usmerjanju niza sporočil iz standardov ISO 15118-2 in ISO 15118-201. Odsotnost
katerega koli primera uporabe v tem dokumentu ne pomeni, da se ne bo izvajal v praksi z zahtevanimi sporočili.
OPOMBA 3: Ta dokument ter standarda ISO 15118-2 in ISO 15118-20 so zasnovani, da delujejo neodvisno od uporabljenega medija za prenos
podatkov. Vendar pa je skupina standardov ISO 15118 oblikovana za vstavljanje določenih podatkovnih povezovalnih plasti v ustrezne dokumente v tej skupini standardov.

General Information

• Status: Published
• Publication Date: 30-Apr-2019
• Withdrawal Date: 29-Nov-2019
• ICS: 43.040.15 - Car informatics. On board computer systems
• ICS: 43.120 - Electric road vehicles
• Technical Committee: CEN/TC 301 - Electrically propelled road vehicles
• Drafting Committee: CEN/TC 301 - Electrically propelled road vehicles
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 01-May-2019
• Completion Date: 01-May-2019
• Mandate: M/468 - Standardisation mandate addressed to CEN and CENELEC and ETSI concerning the charging of electric vehicles
• Ref Project: SIST EN ISO 15118-1:2019 - Road vehicles - Vehicle to grid communication interface - Part 1: General information and use-case definition (ISO 15118-1:2019)

Relations

• Replaces: EN ISO 15118-1:2015 - Road vehicles - Vehicle to grid communication interface - Part 1: General information and use-case definition (ISO 15118-1:2013)
• Effective Date: 15-Jul-2015

Overview

EN ISO 15118-1:2019 (ISO 15118-1:2019) defines the general information and use‑case definitions for the Vehicle‑to‑Grid (V2G) communication interface. As the foundational part of the ISO 15118 series, it specifies terms, definitions and high‑level requirements for High Level Communication (HLC) between the EV communication controller (EVCC) and the supply equipment communication controller (SECC). The standard covers both conductive and wireless (WPT) charging, manual or automatic connection devices, and energy flows in both directions (EVSE → EV and EV → EVSE) including Vehicle‑to‑Home (V2H) and grid supply scenarios.

Key Topics and Requirements

• Scope & terminology: Standardised terms and architecture to ensure common understanding across OEMs, EVSE vendors and grid operators.
• High Level Communication (HLC): Use cases and message set orientation for EVCC ↔ SECC interactions (discovery, pairing, identification, authorization).
• Authorization & identity: Contract certificates, external credentials and certificate handling procedures for secure authentication (“Plug & Charge” scenarios).
• Control & optimization: Charge/discharge control modes, target setting, scheduling, load levelling and dynamic control for demand response and grid support.
• Bidirectional energy transfer: Definitions and use cases for reverse power flow (V2G) to supply homes, loads or the grid.
• Wireless charging (WPT): Pairing, fine positioning and communication setup for wireless power transfer scenarios.
• Security & privacy: High‑level cybersecurity and privacy considerations for protecting transactions, credentials and user data.
• Operational requirements: Reliability, availability, error handling, metering information exchange and traceability.
• Independence of data link: Designed to work independent of the physical data transfer medium while fitting the data link layers described in companion documents.

Practical Applications & Who Uses This Standard

• OEMs (vehicle manufacturers): Implement standardised EV communication interfaces for interoperable charging and V2G features.
• EVSE manufacturers & integrators: Design charging stations (conductive and wireless) that support secure HLC with EVs.
• Charging network operators & energy providers: Enable reservation, billing, load management, demand response and V2G services.
• Utilities & grid operators: Use load‑levelling, fast response services and bidirectional energy flow for grid stability.
• Cybersecurity engineers & system architects: Define certificate management, authentication and privacy policies.
• Policy makers & standards bodies: Reference for regulation and interoperability frameworks.

Related Standards

• ISO 15118‑2 (message and application layer) - message set oriented by Part 1
• ISO 15118‑20 (under development at publication) - evolution of message sets and features
• IEC 61851‑1 - conductive charging baseline; referenced for concurrent charging scenarios

Keywords: ISO 15118-1:2019, vehicle-to-grid, V2G, EV charging communication, EVSE, EVCC, SECC, HLC, wireless power transfer, bidirectional charging, plug-and-charge, load levelling, charge scheduling, cybersecurity, contract certificate.

Standards Content (Sample)

SLOVENSKI STANDARD
01-julij-2019
Nadomešča:
SIST EN ISO 15118-1:2015
Cestna vozila - Komunikacijski vmesnik med vozilom in omrežjem - 1. del: Splošne
informacije in definicija primera uporabe (ISO 15118-1:2019)
Road vehicles - Vehicle to grid communication interface - Part 1: General information
and use-case definition (ISO 15118-1:2019)
Straßenfahrzeuge - Kommunikationsschnittstelle zwischen Fahrzeug und Ladestation -
Teil 1: Allgemeine Informationen und Festlegungen der Anwendungsfälle (ISO 15118-
1:2019)
Véhicules routiers - Interface de communication entre véhicule et réseau électrique -
Partie 1: Informations générales et définition de cas d'utilisation (ISO 15118-1:2019)
Ta slovenski standard je istoveten z: EN ISO 15118-1:2019
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.

EN ISO 15118-1
EUROPEAN STANDARD
NORME EUROPÉENNE
May 2019
EUROPÄISCHE NORM
ICS 43.120 Supersedes EN ISO 15118-1:2015
English Version
Road vehicles - Vehicle to grid communication interface -
Part 1: General information and use-case definition (ISO
15118-1:2019)
Véhicules routiers - Interface de communication entre Straßenfahrzeuge - Kommunikationsschnittstelle
véhicule et réseau électrique - Partie 1: Informations zwischen Fahrzeug und Ladestation - Teil 1:
générales et définition de cas d'utilisation (ISO 15118- Allgemeine Informationen und Festlegungen der
1:2019) Anwendungsfälle (ISO 15118-1:2019)
This European Standard was approved by CEN on 16 March 2019.

CEN 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 CEN
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 CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 15118-1:2019 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 15118-1:2019) has been prepared by Technical Committee ISO/TC 22 "Road
vehicles" in collaboration with Technical Committee CEN/TC 301 “Road vehicles” the secretariat of
which is held by AFNOR.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by November 2019, and conflicting national standards
shall be withdrawn at the latest by November 2019.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 15118-1:2015.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 15118-1:2019 has been approved by CEN as EN ISO 15118-1:2019 without any
modification.
INTERNATIONAL ISO
STANDARD 15118-1
Second edition
2019-04
Road vehicles — Vehicle to grid
communication interface —
Part 1:
General information and use-case
definition
Véhicules routiers — Interface de communication entre véhicule et
réseau électrique —
Partie 1: Informations générales et définition de cas d'utilisation
Reference number
ISO 15118-1:2019(E)
©
ISO 2019
ISO 15118-1:2019(E)
© ISO 2019
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Fax: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved

ISO 15118-1:2019(E)
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
3.1 General terms . 2
3.2 Control modes .13
3.3 Architecture channel .13
3.4 Forward and reverse power transfer .13
3.5 Minimum and maximum energy request limits .13
3.6 Source generator modes .14
4 Abbreviated terms .14
5 Requirements .15
5.1 List of requirements .15
5.2 General communication requirements .15
5.3 User-specific requirements .16
5.3.1 Reliability, availability, error handling and error reporting .16
5.3.2 Private data protection .17
5.3.3 Ease of use .17
5.4 OEM-specific requirements.17
5.5 Utility-specific requirements .18
5.5.1 Power limiting for grid control or local energy control .18
5.5.2 Current and voltage limits for EV supply equipment protection .19
5.5.3 Current and voltage limits for EV protection .19
5.5.4 Authorization of charging services .19
5.5.5 Authorization of energy transfer from the EV to the EV supply equipment .20
5.5.6 Retrofitting .20
5.6 Wireless communication requirements .20
5.6.1 General.20
5.6.2 Communication infrastructure requirements .20
5.7 RPT description .21
5.7.1 General.21
5.7.2 General information and requirements .22
5.8 Traceability requirements .22
6 Actors.23
7 Use case elements.24
7.1 General .24
7.2 Task groups .25
7.3 Task groups description .26
7.3.1 Start of communication process [A].26
7.3.2 Plug-in and forced HLC .28
7.3.3 WA1: discovery with reservation .29
7.3.4 Plug-in with concurrent IEC 61851-1 and HLC .29
7.3.5 WA2: discovery without reservation .30
7.4 Communication set-up [B] .31
7.4.1 EVCC/SECC conductive communication set-up .31
7.4.2 WB1: EVCC/SECC wireless communication set-up .32
7.5 Certificate handling [C] .32
7.5.1 Certificate update .32
7.5.2 Certificate installation .33
7.6 Identification and authorization [D] .35
7.6.1 Overview .35
ISO 15118-1:2019(E)
7.6.2 Authorization using contract certificates performed at the EV supply
equipment . . .36
7.6.3 Authorization using contract certificates performed with the help of an SA .37
7.6.4 Authorization at the EV supply equipment using external credentials
performed at the EV supply equipment .39
7.6.5 Authorization at the EV supply equipment using external credentials
performed with the help of an SA .40
7.6.6 WD1: Authentication with prior reservation .41
7.7 Pairing and fine positioning.42
7.7.1 WP1: WPT fine positioning .42
7.7.2 WP2: WPT fine positioning without communication support .42
7.7.3 WP3: Conductive energy transfer pairing .43
7.7.4 WP4: WPT pairing .44
7.8 Target setting and energy transfer scheduling [E] .45
7.8.1 AC charging with load levelling based on HLC .45
7.8.2 WE1: WPT target setting and charge scheduling .46
7.8.3 Optimized charging with scheduling from secondary actors .46
7.8.4 DC charging with load levelling based on HLC . .48
7.8.5 Resume to authorized charging schedule .49
7.8.6 Reverse power transfer with load levelling based on HLC .50
7.8.7 Reverse power transfer on stand-alone operation .51
7.8.8 Fast responding energy transfer services based on dynamic control mode .52
7.8.9 Managed bidirectional power transfer into the grid and/or into the home .54
7.9 Energy transfer controlling and re-scheduling [F] .56
7.9.1 Energy transfer loop .56
7.9.2 Energy transfer loop with metering information exchange .57
7.9.3 WF1: WPT charging loop .58
7.9.4 Energy transfer loop with interrupt from the SECC .59
7.9.5 Energy transfer loop with interrupt from the EVCC or USER .59
7.9.6 Energy transfer control based on dynamic control mode .60
7.10 Value-added services [G] .62
7.10.1 Value-added services.62
7.10.2 WG1: ACD system status check .63
7.10.3 Energy transfer details .64
7.11 End of energy transfer process [H].64
7.11.1 General.64
7.11.2 End of energy transfer process .65
7.12 WPT end of charge WH1.66
7.12.1 General.66
7.12.2 WPT end of charge WH1 .66
7.13 ACD connect/disconnect WI .68
7.13.1 ACD connect/disconnect WI .68
Annex A (informative) Conductive charging infrastructure architecture .69
Annex B (informative) Security .82
Annex C (informative) Examples of charging scenarios derived from the use case elements .88
Annex D (informative) Typical RPT system .106
Annex E (normative) Requirement list .108
Bibliography .116
iv © ISO 2019 – All rights reserved

ISO 15118-1:2019(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www .iso
.org/iso/foreword .html.
This document was prepared jointly by Technical Committee ISO/TC 22, Road vehicles, Subcommittee
SC 31, Data communication, and Technical Committee IEC/TC 69, Electric road vehicles and electric
industrial trucks. The draft was circulated for voting to the national bodies of both ISO and IEC.
This second edition cancels and replaces the first edition (ISO 15118-1:2013) which has been technically
revised. The main changes compared to the previous edition are as follows:
— new use cases and requirements for wireless communication, wireless power transfer, automatic
connection devices and bidirectional power transfer have been added; and
— as usage of private data and cyber security are becoming an important concern for users,
requirements for more traceability and data privacy have also been added.
A list of all parts in the ISO 15118 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/members .html.
ISO 15118-1:2019(E)
Introduction
The pending energy crisis and the necessity to reduce greenhouse gas emissions have led vehicle
manufacturers to make a very significant effort to reduce the energy consumption of their vehicles.
They are presently developing vehicles partly or completely propelled by electric energy. Those vehicles
will reduce the dependency on oil, improve global energy efficiency and reduce the total CO emissions
for road transportation if the electricity is produced from renewable sources. To charge the batteries of
such vehicles, specific charging infrastructure is required.
Much of the standardisation work on dimensional and electrical specifications of the charging
infrastructure and the vehicle interface is already treated in the relevant ISO or IEC groups. However,
the question of the interoperability of information transfer between the vehicle, the local installation
and the grid is also of the upmost importance.
Such communication is beneficial for the optimisation of energy resources and energy production
systems as vehicles can charge or discharge at the most economic or most energy-efficient instants.
It is also required to develop efficient and convenient payment systems in order to cover the resulting
micro-payments. The necessary communication channel can serve in the future to contribute to the
stabilisation of the electrical grid as well as to support additional information services required to
operate electric vehicles efficiently.
The requirements of this document form the basic framework for all use cases descriptions and related
documents in the ISO 15118 series. This document is the result of a large consensus among all the actors
of the electro mobility and is a guideline for implementers of the ISO 15118 series.
vi © ISO 2019 – All rights reserved

INTERNATIONAL STANDARD ISO 15118-1:2019(E)
Road vehicles — Vehicle to grid communication
interface —
Part 1:
General information and use-case definition
1 Scope
This document, as a basis for the other parts of the ISO 15118 series, specifies terms and definitions,
general requirements and use cases for conductive and wireless HLC between the EVCC and the SECC.
This document is applicable to HLC involved in conductive and wireless power transfer technologies in
the context of manual or automatic connection devices.
This document is also applicable to energy transfer either from EV supply equipment to charge the EV
battery or from EV battery to EV supply equipment in order to supply energy to home, to loads or to
the grid.
This document provides a general overview and a common understanding of aspects influencing
identification, association, charge or discharge control and optimisation, payment, load levelling,
cybersecurity and privacy. It offers an interoperable EV-EV supply equipment interface to all e-mobility
actors beyond SECC.
The ISO 15118 series does not specify the vehicle internal communication between battery and other
internal equipment (beside some dedicated message elements related to the energy transfer).
NOTE 1 Electric road vehicles specifically are vehicles in categories M (used for carriage of passengers) and
N (used for carriage of goods) (compare ECE/TR ANS/WP.29/78 ev.2). This does not prevent vehicles in other
categories from adopting the ISO 15118 series as well.
1)
NOTE 2 This document is destined to orientate the message set of ISO 15118-2 and ISO 15118-20 . The
absence of any particular use case in this document does not imply that it will not be put into practice, with the
required messages.
NOTE 3 This document, ISO 15118-2 and ISO 15118-20 are designed to work independent of data transfer
medium used. However, the ISO 15118 series is made for fitting the specified data link layers in the corresponding
documents in this series.
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.
ISO/TR 8713, Electrically propelled road vehicles — Vocabulary
ISO 15118-2, Road vehicles — Vehicle to grid communication interface — Part 2: Network and application
protocol requirements
ISO 15118-3, Road vehicles — Vehicle to grid communication interface — Part 3: Physical and data link
layer requirements
1) Under preparation. Stage at the time on publication: ISO/DIS 15118-20:2019.
ISO 15118-1:2019(E)
ISO 15118-8, Road vehicles — Vehicle to grid communication interface — Part 8: Physical layer and data
link layer requirements for wireless communication
2)
ISO 15118-20 , Road vehicles — Vehicle to grid communication interface — Part 20: 2nd generation
network and application protocol requirements
EN 50549-1, Requirements for generating plants to be connected in parallel with distribution networks —
Part 1: Connection to a LV distribution network — Generating plants up to and including Type B
IEC 61851-1, Electric vehicle conductive charging system — Part 1: General requirements
IEC 61980-2, Electric vehicle wireless power transfer (WPT) systems — Part 2 specific requirements for
communication between electric road vehicle (EV) and infrastructure with respect to wireless power
transfer (WPT) systems
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO/TR 8713 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https: //www .iso .org/obp
— IEC Electropedia: available at http: //www .electropedia .org/
3.1 General terms
3.1.1
actor
entity which characterizes a role played by a user or any other system that interacts with the subject
3.1.2
ancillary services
services necessary for the operation of an electric power system provided by the system operator and/
or by power system users
[SOURCE: IEC IEV Electropedia, 617-3-9, modified — The Note has been removed.]
3.1.3
association
procedure to establish the wireless communication between the SECC (3.1.68) controlling the charging
infrastructure [e.g. coils for WPT (3.1.76)] and the EVCC (3.1.31)
3.1.4
authentication
procedure between the EVCC (3.1.31) and the SECC (3.1.68) or between the USER and the EV (3.1.30)
supply equipment or the SA, to prove that the provided information [see identification (3.1.49)] is either
correct, valid, or it belongs to the EVCC, the USER or the SECC
3.1.5
authorization
procedure to verify if an EV (3.1.30) is allowed to charge (3.1.12) or discharge (3.1.22)
3.1.6
automatic connection device
ACD
components supporting the automatic connection and disconnection process for conductive energy
transfer between an EV (3.1.30) and the EV supply equipment (3.1.33 and 3.1.34)
2) Under preparation. Stage at the time of publication: ISO/DIS 15118-20:2019.
2 © ISO 2019 – All rights reserved

ISO 15118-1:2019(E)
3.1.7
basic signalling
physical signalling according to the pilot function (3.1.55)
Note 1 to entry: This definition is provided by IEC 61851-1:2017, Annex A.
3.1.8
battery management system
BMS
electronic device that controls or manages the electric and thermal functions of the battery system and
that provides communication between the battery system and other vehicle controllers
3.1.9
bidirectional power converter
BPC
stabilized power supply device which delivers BPT (3.1.10) functions
3.1.10
bidirectional power transfer
BPT
combination of forward or reverse power transfer sequences
3.1.11
certificate
electronic document which uses a digital signature to bind a public key with an identity
Note 1 to entry: The ISO 15118 series describes several certificates covering different purposes, e.g. the contract
certificate including the EMAID and OEM (3.1.52) provisioning certificates.
3.1.12
charge
store electrical energy in the vehicle battery
Note 1 to entry: In the first edition of this document, the words “charge” or “charging” were used intensively
as a generic term. In this edition, in order to be more precise and to cover with one word forward (3.4.1) and
Reverse Power Transfer (3.4.2) the terms “charge” and its declinations have been replaced by “energy transfer”
when appropriate. When energy transfer is used in a sentence, this means that both directions of power flow are
possible.
Note 2 to entry: The term “charge” (and the associated verb) has in this text a precise definition in relation to
the amount of energy stored in the EV (3.1.30) battery which can be different than the total energy transferred
to the EV.
Note 3 to entry: In some sentences, the word “charging” is still used. For example, the words “charging site” are
still used.
3.1.13
charger
power converter that performs the necessary functions for charging a battery
3.1.14
charging station operator
CSO
EV supply equipment operator
secondary actor (3.1.64) responsible for the installation and operation of a charging infrastructure
(including charging sites) and the management of electricity to provide the requested energy transfer
services
Note 1 to entry: The term CPO (Charge Point Operator) is also used in the ISO 15118 series. This term is not
recommended for trademark reasons.
ISO 15118-1:2019(E)
3.1.15
communication session
sequence of time where the EVCC (3.1.31) and the SECC (3.1.68) interactively exchange digital
information in order to manage charging or discharging the EV (3.1.30) battery
Note 1 to entry: A communication session can be paused and resumed later several times. The communication
session encapsulates zero or more energy transfer periods (3.1.37).
3.1.16
contactor
electrically controlled switch used for switching a power circuit
Note 1 to entry: Unlike a circuit breaker, a contactor is not intended to interrupt a short circuit current.
Note 2 to entry: As far as communication is concerned, the contactor occurs as a trigger (3.1.70) for the
power supply.
3.1.17
credential
document attesting the permission of the EV (3.1.30) to be charged (3.1.12) or to discharge (3.1.22)
3.1.18
demand and prognosis
function that covers the collection of grid and local installation conditions which applies to the actual
energy transfer process
EXAMPLE The sales tariff table (3.1.63) containing a price, CO content and percentage of renewable energy
information vs. time based on grid, energy production, energy demand and customer contract information,
along with an optional contract-based current limitation. The grid schedule (3.1.46) containing a current vs.
time limitation at the specific EV (3.1.30) supply equipment due to local installation and local electricity demand
situation.
3.1.19
demand clearing house
DCH
entity for grid negotiation that provides information on the load of the grid
Note 1 to entry: The demand clearing house mediates between two clearing partners: an SECC (3.1.68) and the
part of the power grid connected to this SECC. Most likely this function will be served by a system operator.
Note 2 to entry: Demand clearing house and meter operator (3.1.51) may exchange information with each other
as well as with other actors (3.1.1).
EXAMPLE A DCH typically fulfils the following tasks:
— Collect all necessary information from all parts of the power grid, e.g. current or forecasted load of local
transformers, distribution grid, power substation, transmission grid, transmission substation, power plants
(including renewable energies) and predicted energy transfer schedules (3.1.39) submitted by EVCCs (3.1.31).
— Consolidate the collected grid information to a “grid profile” and offer it to SECCs/EVCCs.
— Provide energy transfer schedule proposal for the connected EV (3.1.30) to the requesting SECC based on the
collected grid profile.
— Inform the SECC as to the necessity for an updated energy transfer schedule if the grid profile has changed.
— On the contrary, the SECC will inform the demand clearing house if the EV's energy transfer schedule has
changed.
3.1.20
distributed energy resources
DER
distributed set of one or more energy service resources, including generators, energy storage and
controllable load, that can be used to deliver ancillary services (3.1.2)
4 © ISO 2019 – All rights reserved

ISO 15118-1:2019(E)
3.1.21
departure time
point in time when the user intends to unplug the car and/or leave the charging site
3.1.22
discharge
release the electric charge of the vehicle battery
3.1.23
discovery
phase in which an EV (3.1.30) obtains a list of available SECCs (3.1.68) in its wireless communication range
3.1.24
distribution system operator
DSO
entity responsible for the voltage stability in the distribution grid
Note 1 to entry: Electricity distribution is the final stage in the physical delivery of electricity to the delivery
point, e.g. end user, EV supply equipment (3.1.33 and 3.1.34) or parking operator.
Note 2 to entry: A distribution system network carries electricity from the transmission grid and delivers it to
consumers. Typically, the network would include medium-voltage power lines, electrical substations and low-
voltage distribution wiring networks with associated equipment.
3.1.25
e-mobility needs
mobility needs expressed by the EV (3.1.30) user in terms of departure time (3.1.21), minimum (3.5.1)
and maximum energy request (3.5.2) and target energy request
3.1.26
e-mobility operator clearing house
EMOCH
entity mediating between two clearing partners to provide validation services for roaming regarding
contracts of different EMSPs (3.1.27)
Note 1 to entry: EMOCH mediates for the purpose of:
— collecting all necessary contract information like the EMAID, the EMSP, the communication path to the EMSP,
roaming fees, begin and end dates of the contract, etc.;
— providing the SECC (3.1.68) with confirmation that an EMSP will pay for a given EMAID [authorization (3.1.5)
of valid contract]; and
— transferring an SDR (3.1.66) after each energy transfer period (3.1.37) to connect the EMSP and the EP (3.1.29)
of the identified contract.
Note 2 to entry: The EMOCH, EMSP and meter operator (3.1.51) may exchange information with each other as
well as other actors (3.1.1).
3.1.27
e-mobility service provider
EMSP
entity with which the customer has a contract for all services related to the EV (3.1.30) operation
Note 1 to entry: Typically, the EMSP will include some of the other actors (3.1.1), like the spot operator or EP
(3.1.29), and has a close relationship with the distribution system operator (3.1.24) and meter operator (3.1.51).
An OEM (3.1.52) or utility could also fulfil such a role.
Note 2 to entry: The EMSP validates EMAIDs from his customers, which were received either from the EMOCH
(3.1.26), other EMSPs or spot operators the customer is in relation with.
Note 3 to entry: The EMSP issues EMAIDs to his customers.
ISO 15118-1:2019(E)
3.1.28
electric energy meter
EEM
equipment for measuring electrical energy by integrating power with respect to time
Note 1 to entry: The equipment complies with IEC 62052-11 and IEC 62053-21, IEC 62053-52.
Note 2 to entry: Some use cases (3.1.71) need the amount of electric energy measured by the electric energy
meter and communicated through the SECC (3.1.68) to the EVCC (3.1.31), while other scenarios do not need
a separate electric energy meter. The EV (3.1.30) may get this information and use it according to the OEM’s
(3.1.52) intentions.
3.1.29
electricity provider
EP
entity whose activity is the wholesale purchase of electricity and the subsequent direct resale to a client
through a contract
Note 1 to entry: The provider may also deliver energy related services.
Note 2 to entry: Provider can generate flexibilities through modulation of electricity prices (Time-of-Use, Critical
Peak Prices.), flexibilities which can have value on energy markets and/or for network operations.
3.1.30
electric vehicle
EV
all road vehicles, including plug-in hybrid road vehicles (PHEV), that derive all or part of their energy
from on-board rechargeable energy storage systems (RESS)
[SOURCE: IEC 61851-1:2017, 3.1.32]
3.1.31
electric vehicle communication controller
EVCC
embedded system, within the vehicle, that implements the communication between the vehicle and the
SECC (3.1.68) in order to support specific functions
Note 1 to entry: Such specific functions could be e.g. controlling input and output channels, encryption or data
transfer between the vehicle and the SECC.
3.1.32
electric vehicle power system
EV power system
equipment or combination of equipment providing dedicated functions to supply electric power in both
directions:
— from an electrical installation or supply network to an EV (3.1.30) for the purpose of charging; and
— from a DER (3.1.20) in the EV to supply network or the grid for the purpose of discharging
Note 1 to entry: The former function is equal to the EV supply equipment (3.1.33 and 3.1.34), provided by IEC
61851-1.
6 © ISO 2019 – All rights reserved

ISO 15118-1:2019(E)
3.1.33
electric vehicle supply equipment
EV supply equipment
conductors, including the phase(s), neutral and protective earth conductors,
the EV (3.1.30) couplers, attached plugs, and all other accessories, devices, power outlets (3.1.58) or
apparatuses installed specifically for the purpose of delivering energy from the premises wiring to the
EV and allowing communication between them as necessary
Note 1 to entry: This document will keep the wording “EV supply equipment” for any energy transfe
...