EN ISO 15118-20:2022/prA1:2024

SLOVENSKI STANDARD
01-februar-2025
Cestna vozila - Komunikacijski vmesnik med vozilom in omrežjem - 20. del:
Zahteve za omrežno in aplikacijsko plast druge generacije - Dopolnilo A1 (ISO
15118-20:2022/DAmd1:2024)
Road vehicles - Vehicle to grid communication interface - Part 20: 2nd generation
network layer and application layer requirements - Amendment 1: AC DER service, MCS
service, and improved security concept (ISO 15118-20:2022/DAmd1:2024)
Straßenfahrzeuge - Kommunikationsschnittstelle zwischen Fahrzeug und Ladestation -
Teil 20: Anforderungen der 2. Generation an das Netzwerk- und Anwendungsprotokoll -
Ergänzung 1 (ISO 15118-20:2022/DAmd 1:2024)
Véhicules routiers - Interface de communication entre véhicule et réseau électrique -
Partie 20: Exigences des couches réseau et application de 2ème génération -
Amendement 1: Titre manque (ISO 15118-20:2022/DAmd1:2024)
Ta slovenski standard je istoveten z: EN ISO 15118-20:2022/prA1:2024
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
Amendment
ISO 15118-20:2022/
DAM 1
ISO/TC 22/SC 31
Road vehicles — Vehicle to grid
Secretariat: DIN
communication interface —
Voting begins on:
Part 20:
2024-12-13
2nd generation network layer and
Voting terminates on:
application layer requirements 2025-03-07
AMENDMENT 1: AC DER service, MCS
service, and improved security concept
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,
TECHNOLOGICAL, COMMERCIAL AND
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 15118-20:2022/DAM 1:2024(en)

DRAFT
ISO 15118-20:2022/DAM 1:2024(en)
Amendment
ISO 15118-20:2022/
DAM 1
ISO/TC 22/SC 31
Road vehicles — Vehicle to grid
Secretariat: DIN
communication interface —
Voting begins on:
Part 20:
2nd generation network layer and
Voting terminates on:
application layer requirements
AMENDMENT 1: AC DER service, MCS
service, and improved security concept
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,
© ISO 2024
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: +41 22 749 01 11
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION.
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland Reference number
ISO 15118-20:2022/DAM 1:2024(en)

ii
ISO 15118-20:2022/DAM 1:2024(en)
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 by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 31, Data
communication.
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.

iii
ISO 15118-20:2022/DAM 1:2024(en)
Road vehicles — Vehicle to grid communication interface —
Part 20:
2nd generation network layer and application layer
requirements
AMENDMENT 1: AC DER service, MCS service, and improved
security concept
Clause 2
Add the following references at the end of this clause:
ISO 15118-10:202X, Road vehicles – Vehicle-to-grid communication interface – Part 10: Physical layer and data
link layer requirements for single-pair Ethernet.
IEC 61851-23-3:202X, Electrical power/energy transfer systems for electrically propelled road vehicles and
industrial trucks.
Clause 3
Add the following terms and definitions at the end of this clause:
3.72
charge enable state
CE state
state according to the charge enable function defined in IEC 61851-23-3
3.73
megawatt charging system
MCS
charging system according to IEC 61851-23-3
3.74
cease to energize
cessation of active power delivery under steady-state and transient conditions and limitation of reactive
power exchange
Note 1 to entry: After the cessation is over, the EV is allowed to return immediately into service without following the
enter service rules.
3.75
distributed energy resource
DER
source of electric power that is not directly connected to a bulk power system.
EXAMPLE Generators and energy storage technologies capable of exporting active power to the electrical grid.
Note 1 to entry: An interconnection system or a supplemental DER device that is necessary for compliance with this
document is part of a DER.
ISO 15118-20:2022/DAM 1:2024(en)
3.76
enter service
set of parameters that defines how to start energizing or re-energizing the electric power system
Note 1 to entry: If voltage and frequency values are not within the desired range, the DER will not be allowed to start
injecting power to the grid/electric power system.
3.77
frequency droop curve
parameterized curve of the frequency-watt function
Note 1 to entry: The parameters include a frequency dB (dead band) and a unitless factor k which defines the rate
of power output change due to the frequency change. This operation limits active power generation or consumption
when the line frequency deviates from nominal by a specified amount.
3.78
level 1 charging
charging with a maximum power between 1 kW and 1,8 kW, via a standard 120 Vrms AC single phase outlet
Note 1 to entry: This power limit is only applicable in the US.
3.79
level 2 charging
charging with a maximum power between 3 kW and 22 kW, via a dedicated AC charger
Note 1 to entry: In the US the voltage supplied is typically 240 Vrms AC whereas in Europe is 230 Vrms AC.
3.80
may trip region
region of voltage or frequency within which the EV is allowed to cease to energize and to trip the connection
Note 1 to entry: The region is defined by a piecewise linear curve demarcating the boundary for voltage or frequency.
3.81
momentary cessation region
region of voltage or frequency within which the EV will temporarily cease to energize (inject power to) an
electric power system in response to a disturbance of the applicable voltages or the system frequency
Note 1 to entry: When entering this region, the EV will retain the capability of immediate restoration of the output of
operation when the applicable voltages and the system frequency return to within the defined ranges.
Note 2 to entry: The region is defined by a piecewise linear curve demarcating the boundary for voltage or frequency.
3.82
must trip region
region of voltage or frequency within which the EV must cease to energize and must trip the connection
Note 1 to entry: The region is defined by a piecewise linear curve demarcating the boundary for voltage or frequency.
3.83
open loop response time
time to ramp up to 90 % of the new target in response to the step change of the control input signal
3.84
over-excited excitation type
excitation type, where a DER injects/supplies reactive power to the system
Note 1 to entry: An over-excited DER injects/supplies reactive power to the system. The term is usually associated
with synchronous machines (motors or generators). In generator sign convention, an over-excited DER has its current
lagging the voltage (reactive power > 0) and the reactive power injection tends to increase the system voltage.
3.85
permit service
setting that indicates whether a DER is allowed to enter or remain in service

ISO 15118-20:2022/DAM 1:2024(en)
3.86
return to service
enter service following recovery from a trip
3.87
ride-through
ability to withstand voltage or frequency disturbances inside defined limits and to continue operating as
specified
3.88
trip
inhibition of immediate return to service
Note 1 to entry: Once the DER has permission to come back to service, it must follow the enter service rules.
3.89
under-excited excitation type
excitation type, where a DER absorbs/consumes reactive power from the system
Note 1 to entry: An under-excited DER absorbs/consumes reactive power from the system. The term is usually
associated with synchronous machines (motors or generators). In generator sign convention, an under-excited DER
has its current leading the voltage (reactive power < 0) and the reactive power absorption tends to decrease the
system voltage.
Clause 6
Replace Figure 2 with this figure:

ISO 15118-20:2022/DAM 1:2024(en)
Figure 2 — Vehicle to grid communication document overview

Clause 7.3.2
Replace Table 2 with this table:

ISO 15118-20:2022/DAM 1:2024(en)
Table 2 — Certificate extension examples
Certificate extensions Description
Usage of the corresponding private key (e.g. Digital Signature, non-repudia-
Key usage
tion, key encipherment, …)
Further specification of key usage using OIDs, e.g.:
— server authentication (1.3.6.1.5.5.7.3.1)

— client authentication (1.3.6.1.5.5.7.3.2)
NOTE Sometimes the following values are encoded here:
— Netscape SGC (1.3.6.1.4.1.311.10.3.3)
Extended Key Usage
— Microsoft SGC (2.16.840.1.113730.4.1)
SGC stands for server gated crypto and indicates that the
server can also use strong cryptography for the connection
with the client’s browser. This extension was used at the time
of strong crypto export control to enable financial web site to
provide appropriate protection of the data transfer.
CRL distribution point Location to retrieve certificate revocation lists
OCSP Location to retrieve OCSP. Refer to IETF RFC 6960 as updated by
IETF RFC 8954 for details.
Authority information Additional authorization information
Subject alternative name Alternative names of the entity
Basic constraint = CA True if the certificate is a root certificate or a Sub-CA certificate.
Subject information Additional information about the subject
Add the following new paragraph below NOTE 14 to requirement [V2G20-1234]:
In this document, the size of certificate is less than or equal to 1600 bytes. This limit considers resource
constraints in embedded systems and complying secondary actors must be aware of this when they generate
certificates. For example, it is recommended to be cautious when adding long URLs, 4-byte characters
in distinguished names, or multiple certificate policies as these may increase the size of the certificate
significantly
...