Overview
EN ISO 15118-10:2025 (ISO 15118-10:2025) specifies the physical layer and data link layer requirements for vehicle-to-grid (V2G) high-level communication (HLC) using single-pair Ethernet. The standard applies specifically to 10BASE-T1S single-pair Ethernet and covers communication between electric vehicles (EV) and electric vehicle supply equipment (EVSE). It defines how differential, balanced twisted-pair wiring is used to enable reliable, interoperable charging communications as part of the broader ISO 15118 series.
Key topics and technical requirements
- Physical layer requirements: channel characteristics, node coupling and channel topology for dedicated single-pair wiring, and constraints needed to support robust EV–EVSE links.
- Data link layer requirements: frame handling, layer‑2 interfaces, service primitives and OSI-based service definitions to support HLC messaging.
- System architecture: communication layer mapping, data SAPs, and interfaces between EV and EVSE.
- Connection coordination: procedures for plug-in, initialization, sleep/wake, loss-of-communication handling and charge-pause scenarios.
- Timing and constants: prescribed timing behaviors and parameters for inter-layer coordination and link management.
- EMC considerations: electromagnetic compatibility requirements relevant to the physical channel and nodes.
- Terminology and scope: normative references, definitions and abbreviated terms used across the document.
Practical applications
- Ensures interoperable V2G communications for EV charging stations and vehicles using single-pair Ethernet (10BASE-T1S).
- Supports manufacturers designing EV onboard controllers, EVSE communication modules, single-pair Ethernet transceivers and coupling networks.
- Guides test laboratories and certification bodies in validating physical and link-layer compliance for EV/EVSE products.
- Enables architects and network engineers to integrate low-cost, reduced-wiring Ethernet for charging infrastructure while meeting safety and EMC constraints.
Who should use this standard
- EV OEMs and Tier-1 suppliers implementing onboard charging communications.
- EVSE manufacturers and charging network operators deploying Ethernet-based charging points.
- Semiconductor vendors and module designers developing 10BASE-T1S PHY and MAC components.
- Test labs, compliance engineers and system integrators responsible for V2G interoperability and EMC certification.
Related standards
- Part of the ISO 15118 series (vehicle-to-grid communication); consult other parts for application-layer protocols, security and conformance.
- Complements single-pair Ethernet specifications and industry guidelines for automotive and charging-network interoperability.
Keywords: EN ISO 15118-10:2025, ISO 15118-10, single-pair Ethernet, 10BASE-T1S, vehicle-to-grid, V2G, EV, EVSE, physical layer, data link layer, EV charging.
