SIST EN ISO 15118-3:2016 PDF

Overview - EN ISO 15118-3:2016 (ISO 15118-3:2015)

EN ISO 15118-3 defines the physical layer and data link layer requirements for wired vehicle-to-grid (V2G) communication between electric vehicles (BEV/PHEV) and charging infrastructure (EVSE). It applies to manually connected conductive charging using EVSEs that support high‑level communication (specifically IEC modes 3 and 4). The part covers low‑layer communication architecture, information exchange between actors in the energy transfer, and interfaces needed to support higher-layer V2G services.

Key topics and technical requirements

• Physical and data link layer scope - Requirements for establishing and maintaining a reliable wired communication channel between EV and EVSE.
• System architecture - OSI‑based services mapping, low‑layer communication module configuration, and identification requirements for EV and EVSE.
• Connection coordination - Procedures for plug‑in, initialization, sleep/wake‑up, loss of communication and plug‑out phases to ensure safe charging sessions.
• Matching and network setup - Discovery of compatible low‑layer modules, validation of matching decisions, logical network formation and error handling.
• Timing and constants - Defined timings and protocol constants relevant to link establishment and state transitions.
• EMC and signal coupling - Electromagnetic compatibility criteria and recommended signal coupling approaches for robust operation.
• Layer 2 interfaces - Data Service Access Points (SAP), data link control SAP to layer 3 interfaces and interoperability requirements.
• Profiles and annexes - Includes a normative annex on HomePlug Green PHY over control pilot and an informative annex on IEEE 1901.2 G3‑PLC profiling for the control‑pilot line.

Practical applications and who uses this standard

• EV OEMs and Tier‑1 suppliers - Implement compliant on‑board communication modules to ensure interoperability with public and private chargers.
• EVSE and charging station manufacturers - Design physical interfaces and data‑link firmware that conform to timing, EMC and signaling requirements.
• Charging network operators & utilities - Ensure networked chargers can reliably communicate with vehicles for smart charging and V2G services.
• Test laboratories & certification bodies - Develop conformance and interoperability tests based on the layer‑2/physical requirements.
• System integrators & software developers - Integrate low‑level communication stacks with higher‑layer ISO 15118 services (authentication, billing, smart charging).

Related standards

• ISO 15118 (other parts): Part 1 (use cases) and Part 2 (network & application protocols) - complements Part 3 by defining higher‑layer protocols and use cases.
• Relevant IEC basic signalling standards (modes 3 and 4) - Part 3 is intended to work alongside applicable IEC conductive charging signalling documents.

Keywords: ISO 15118-3, EN ISO 15118-3:2016, vehicle-to-grid, V2G, EV charging communication, EVSE, physical layer, data link layer, HomePlug Green PHY, IEEE 1901.2, control pilot, EV interoperability.