GAR | GRVA-25-33

GRVA-25-33

e-Trailer Industry Group: Status and discussions

Source(s)

Date

19 May 2026

Status

Subject

Meeting(s)

GRVA | Session 25 | 18-22 May

Agenda item 8. (c) Clarifications

Presentation on electrically propelled and recuperating trailers. The document outlines communication flows between towing vehicles and e-trailers using ISO 11992-2 over ISO 7638-1, involving parameter groups EBS14 (control), EBS28 (energy/state of charge), and EBS29 (status). Key principles include the towing vehicle setting control modes and requesting torque, with trailers reporting capabilities. The document discusses support for maximum three e-axle equipped trailers due to bandwidth limitations, enabling of e-trailer control via CANopen Service Data Objects, and backward compatibility with ISO 11992-2:2014. Amendments to UN Regulation 13 are planned with target entry into force in May 2028.

Downloads

UNECE server

Related documents

Excerpts from session reports

GRVA | Session 24 | 19-23 Jan

76. GRVA recalled the purpose of ECE/TRANS/WP.29/GRVA/2025/15 introducing provisions for the approval of e-axles. The representative of CLEPA, also on behalf of CLCCR and OICA, presented (GRVA-24-39) the ongoing discussions held at meetings of the e-trailer industry group, working in two phases. He recalled that Phase I was completed (dynamo function) and was tabled for adoption by WP.29 in March 2026. He detailed the activities on Phase II on e-trailers that recuperates and supports propulsion or other trailer systems. He detailed the timeline, which is interdependent with the timeline of the January 2027 edition of ISO 11992 (as the 2023 edition was deemed unsafe to implement). He recalled the provisions in UN Regulation No. 100 (Electric power trained vehicles) already adopted and in force since October 2025. He listed some technical aspects under discussion and announced two workshops scheduled in spring 2026. The representative of Sweden recommended to keep this workstream aligned with the trailer definition in the Consolidated Resolution R.E.3.