ISO 15118-20:2022 PDF

Road vehicles - Vehicle to grid communication interface - Part 20: Network and application protocol requirements

First page of standard ISO 15118-20:2022

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Title (English):

ISO 15118-20:2022

Road vehicles - Vehicle to grid communication interface - Part 20: Network and application protocol requirements

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 561
Publication date:: April 26, 2022
Edition:: IEC IS 15118 edition 1 version 1
ICS:: 43.120

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Description (English):

ISO 15118-20:2022 This document specifies the communication between the electric vehicle (EV), including battery electric vehicle (BEV) and plug-in hybrid electric vehicle (PHEV), and the electric vehicle supply equipment (EVSE). The application layer messages defined in this document are designed to support the electricity power transfer between an EV and an EVSE. This document defines the communication messages and sequence requirements for bidirectional power transfer. This document furthermore defines requirements of wireless communication for both conductive charging and wireless charging as well as communication requirements for automatic connection device and information services about charging and control status. The purpose of this document is to detail the communication between an electric vehicle communication controller (EVCC) and a supply equipment communication controller (SECC). Aspects are specified to detect a vehicle in a communication network and enable an Internet Protocol (IP) based communication between the EVCC and the SECC.

Technical details

Technical committee: TC 69 - Electrical power/energy transfer systems for electrically propelled road vehicles and industrial trucks
SKU: ISO 15118-20:2022

Abstract

Overview

ISO 15118-20:2022 - Road vehicles: Vehicle-to-grid (V2G) communication interface - Part 20 defines the second‑generation network and application layer requirements for communication between an electric vehicle (EV: BEV/PHEV) and electric vehicle supply equipment (EVSE). Published as part of the ISO/IEC collaboration, the standard specifies IP‑based messaging, session handling and sequences designed to support electricity transfer (including bidirectional power transfer / V2G) and information services for charging status and control.

Key topics and technical requirements

Scope and roles: Defines interfaces between the Electric Vehicle Communication Controller (EVCC) and the Supply Equipment Communication Controller (SECC).
Application layer messages & sequences: Formal message definitions, handshake, service selection, message sequencing, error handling and timing for AC/DC and wireless charging.
Network & transport stacks: IP‑based communication with specified use of transport protocols (TCP, UDP) and the V2G transfer protocol for payloads.
Security and certificates: TLS use, certificate/key management, root certificate validity, cryptographic key protection, random number generation and firewall considerations.
Data link & wireless: Requirements for conductive (including WLAN) and wireless power transfer (WPT) communication, and handling of Automatic Connection Device (ACD).
Presentation & encoding: XML and Efficient XML Interchange (EXI) usage, message headers, PDU structures and message security mechanisms.
Normative artifacts: Schemas, certificate profiles and identifier specifications; informative annexes on sequence examples, interoperability and precision/tolerances.

Practical applications

Enables standardized, interoperable smart charging and vehicle‑to‑grid use cases: controlled charging, demand response, and V2G discharging back to the grid.
Supports wireless charging (WPT) control and automatic connection devices, as well as value‑added information services (billing, session status, diagnostics).
Provides the protocol foundation for charging station firmware, EV telematics stacks, backend charging management systems and utility/grid integration.

Who should use this standard

EV and EVSE manufacturers (hardware & firmware)
Charging network operators and roaming/service providers
Software developers of EV charging stacks, telematics and back‑end platforms
Utilities, grid operators and energy service companies implementing V2G services
Test laboratories and certification bodies verifying protocol and security conformance

Related standards

ISO 15118 series (other parts)
IEC 61851‑1 (EV conductive charging) - referenced for signalling synchronization
IEC 61980‑2 (wireless power transfer for EVs) - referenced for WPT signalling

Keywords: ISO 15118-20, vehicle-to-grid, V2G communication, EVSE, EVCC, SECC, bidirectional charging, EV charging protocol, wireless charging, EXI, TLS, IP-based EV charging.

Related standards

Standards mentioned in the description

Abstract

Overview

Key topics and technical requirements

Scope and roles: Defines interfaces between the Electric Vehicle Communication Controller (EVCC) and the Supply Equipment Communication Controller (SECC).
Application layer messages & sequences: Formal message definitions, handshake, service selection, message sequencing, error handling and timing for AC/DC and wireless charging.
Network & transport stacks: IP‑based communication with specified use of transport protocols (TCP, UDP) and the V2G transfer protocol for payloads.
Security and certificates: TLS use, certificate/key management, root certificate validity, cryptographic key protection, random number generation and firewall considerations.
Data link & wireless: Requirements for conductive (including WLAN) and wireless power transfer (WPT) communication, and handling of Automatic Connection Device (ACD).
Presentation & encoding: XML and Efficient XML Interchange (EXI) usage, message headers, PDU structures and message security mechanisms.
Normative artifacts: Schemas, certificate profiles and identifier specifications; informative annexes on sequence examples, interoperability and precision/tolerances.

Practical applications

Enables standardized, interoperable smart charging and vehicle‑to‑grid use cases: controlled charging, demand response, and V2G discharging back to the grid.
Supports wireless charging (WPT) control and automatic connection devices, as well as value‑added information services (billing, session status, diagnostics).
Provides the protocol foundation for charging station firmware, EV telematics stacks, backend charging management systems and utility/grid integration.

Who should use this standard

EV and EVSE manufacturers (hardware & firmware)
Charging network operators and roaming/service providers
Software developers of EV charging stacks, telematics and back‑end platforms
Utilities, grid operators and energy service companies implementing V2G services
Test laboratories and certification bodies verifying protocol and security conformance

Related standards

ISO 15118 series (other parts)
IEC 61851‑1 (EV conductive charging) - referenced for signalling synchronization
IEC 61980‑2 (wireless power transfer for EVs) - referenced for WPT signalling

Keywords: ISO 15118-20, vehicle-to-grid, V2G communication, EVSE, EVCC, SECC, bidirectional charging, EV charging protocol, wireless charging, EXI, TLS, IP-based EV charging.

ISO 15118-20:2022 PDF

Technical details

Abstract

Overview

Key topics and technical requirements

Practical applications

Who should use this standard

Related standards

Related standards

Abstract

Overview

Key topics and technical requirements

Practical applications

Who should use this standard

Related standards

Related standards

Road vehicles - Vehicle to grid communication interface - Part 20: 2nd generation network layer and applicati…

Corrigendum 1 - Electric vehicle conductive charging system - Part 1: General requirements

Electric vehicle wireless power transfer (WPT) systems - Part 2: Specific requirements for MF-WPT system comm…