ISO 15118-3-2015 PDF

Full title and description

St ISO 15118-3-2015 — Road vehicles — Vehicle to grid communication interface — Part 3: Physical and data link layer requirements. This part of ISO 15118 specifies low‑layer (physical and data link) requirements for a wired high‑level communication channel between electric vehicles (battery electric vehicles and plug‑in hybrid electric vehicles) and electric vehicle supply equipment (EVSE), covering connection coordination, timing, EMC, signal coupling and layer‑2 interfaces required to support the higher layers of the ISO 15118 family.

Abstract

ISO 15118-3:2015 defines the physical and data link layer requirements for high‑level communication directly between BEV/PHEV (EV) and EVSE using wired communication technology in addition to the basic signalling defined in IEC standards. It covers information exchange between actors involved in electrical energy exchange for manually connected conductive charging and applies to EVSE modes 3 and 4. The standard includes normative and informative annexes describing profiles such as HomePlug Green PHY on the control‑pilot line and references to PLC profiles (IEEE 1901.2 G3‑PLC).

General information

• Status: Published (confirmed by ISO review — remains current).
• Publication date: 2015-05 (published 26 May 2015).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 43.120 (Road vehicles — vehicle communications / V2G).
• Edition / version: Edition 1 (2015).
• Number of pages: 79 (official ISO edition listing).

Summary data above taken from ISO’s official entry for ISO 15118-3:2015 (standard confirmed in ISO’s systematic review process and listed as current).

Scope

Defines requirements for establishing and maintaining a reliable wired physical and data‑link communication channel between an EV and EVSE to support the ISO 15118 higher layers and use cases (e.g., secure identification, charging coordination, Plug & Charge enablement at higher layers). Applicability is limited to manually connected conductive charging scenarios and specifically to EVSEs operating in IEC modes 3 and 4; it further specifies EMC, signal coupling, timing, matching/association procedures and the layer‑2 service access points required for upper‑layer interoperability.

Key topics and requirements

• Physical‑layer definitions and signal coupling requirements for reliable wired links (including EMC constraints and coupling methods).
• Data‑link layer interfaces and service access points (SAPs) to map layer‑2 services to ISO 15118 upper layers.
• Connection coordination: plug‑in, initialization, sleep/wake, communication loss handling and unplug sequences to protect safety and charging process integrity.
• Matching and network setup procedures (discovery of compatible low‑layer modules, SLAC-style attenuation/matching to identify the EV–EVSE pair).
• Timing parameters and protocol constants for link establishment, retries and state transitions.
• Profiles and normative annexes describing HomePlug Green PHY usage over the control pilot and informational guidance on IEEE 1901.2 G3‑PLC profiling.

Typical use and users

Implemented and used by EV OEMs, EVSE (charger) manufacturers, system integrators, test laboratories and software/hardware suppliers who build the low‑level communication modules for vehicle charging systems. Also used by interoperability and certification bodies, specification writers for charging network operators, and engineering teams that integrate ISO 15118 stacks (upper layers) with a compliant physical/data‑link implementation.

Related standards

ISO 15118-1, ISO 15118-2 and other parts of the ISO 15118 family (network and application layers, conformance tests and wireless variants / later updates such as ISO 15118-20) are directly related. Complementary and referenced standards include IEC 61851 (conductive charging / control pilot), IEC 62196 (plugs, sockets, vehicle connectors), DIN 70121 (DC charging communication profile), and technical reports / recommended practices such as SAE J2931/J1772 for PLC adaptations; ISO 15118-3 is designed to interwork with these vehicle/charging interface specifications.

Keywords

ISO 15118-3, vehicle‑to‑grid, V2G, EVSE, EV, physical layer, data link layer, PLC, HomePlug Green PHY, SLAC, control pilot, conductive charging, IEC modes 3 and 4.

FAQ

Q: What is this standard?

A: ISO 15118-3:2015 is the part of the ISO 15118 series that specifies the physical and data link layer requirements for wired vehicle‑to‑grid communication between electric vehicles and electric vehicle supply equipment (EVSE).

Q: What does it cover?

A: It covers low‑level communication architecture and requirements needed to establish a reliable wired channel (including EMC, signal coupling, timing, matching/association and layer‑2 interfaces) so higher ISO 15118 layers can perform secure identification, charging negotiation and related energy exchange functions. The standard includes annex material (e.g., HomePlug Green PHY on the control‑pilot line) and guidance on PLC profiling.

Q: Who typically uses it?

A: EV and EVSE manufacturers, protocol stack vendors, test and certification laboratories, system integrators and charging network engineers implementing or validating the low‑level communications needed for ISO 15118‑based charging solutions.

Q: Is it current or superseded?

A: ISO’s official record shows ISO 15118-3:2015 was reviewed and confirmed in ISO’s systematic review process (confirmed in 2024) and therefore remains the current edition of Part 3. Users should monitor ISO and national bodies for any future revisions.

Q: Is it part of a series?

A: Yes — ISO 15118‑3 is one part of the ISO 15118 family (which includes Parts 1, 2, 3, 4, 8, 20, etc.), where different parts define use cases, network/application layers, physical/data‑link layers, conformance tests and additional capabilities such as wireless or next‑generation network layers.

Q: What are the key keywords?

A: Physical layer, data link layer, vehicle‑to‑grid (V2G), EVSE, EV, PLC, HomePlug Green PHY, SLAC, control pilot, EMC, timing, matching, interoperability.