Proposal to establish a new Amendment to UN Global Technical Regulation No. 25 on in-vehicle battery durability for electrified heavy-duty vehicles. The GTR provides harmonized methods to determine battery durability performance of HD-PEVs and HD-OVC-HEVs, including requirements for State of Certified Energy (SOCE) monitors, minimum performance requirements expressed as SOCE values at specific vehicle lifetime points, and in-use verification procedures with Parts A and B to verify monitor accuracy and battery durability compliance respectively. The document includes test procedures for usable battery energy determination via driving on test tracks, road driving, bidirectional power supply systems, or chassis dynamometer testing, family definitions for monitor and battery durability verification, vehicle survey requirements, and data collection specifications.

Proposal to amend UN GTR No. 22 by:

• Introducing requirements for State-of-Certified Energy and State-of-Certified Range monitors,
• Setting Minimum Performance Requirements for battery durability of Pure Electric Vehicles and Off-Vehicle Charging Hybrid Electric Vehicles at 80 per cent energy retention after 5 years or 100,000 km (whichever comes first) and 70 per cent after 8 years or 160,000 km for categories 1-1 and 1-2, with lower thresholds for category 2 vehicles,
• Establishing a two-part in-use verification process comprising monitor accuracy verification and battery durability assessment,
• Introducing a Part C verification procedure for vehicles with V2X functionality or non-traction purposes to verify reported virtual distance accuracy.

Session agenda for the 100th meeting of the Electric Vehicles and the Environment Informal Working Group on 13 October 2026. The agenda covers status reports and presentations on UN GTR 22, UN GTR 21, and UN GTR 25, with discussion of Euro 7 review clause, readiness monitoring, and regulatory topics including MPRs, energy throughput, and Part C virtual distance verification.

Document summarizes ongoing revisions to minimum performance requirements (MPRs), lifetime, and metric requirements for heavy-duty vehicles under GTR 25 Optional Annex 4. Proposes modifying lifetime thresholds (years and kilometers), adding intermediate verification at 5 years to enable early detection of battery-degradation risks, and segmenting MPR thresholds by vehicle category and mission profiles for categories M₁–M₃ and N₁–N₃. Presents vehicle operation data from Chinese manufacturers, capacity retention analysis, energy throughput metrics, and feasibility assessments of 5-year MPR limits with proposed MPR values of 75% covering 98% battery-durability performance.

Proposal to modify test procedures for the Alternative Method using heavy-duty chassis dynamometer to determine Usable Battery Energy (UBE) and battery durability requirements for electrified heavy-duty vehicles. Changes include specifications for dynamometer settings, test room conditions, cooling fan requirements, driver breaks, battery preparation and pre-conditioning, soak and charge procedures, discharge test cycles for both plug-in electric vehicles (HD-PEVs) and optimized charge-sustaining hybrid electric vehicles (HD-OVC-HEVs), test termination criteria, and measurement device requirements. The document provides test procedures, tables for driver break allowances based on distance and driving time, and detailed formulas for calculating battery energy changes and break-off criteria.

Proposal to add para. 8.1.2. to specify required measurements for the test vehicle including onboard measurement data permissibility and minimum requirements, and add para. 8.1.2.1. to specify measurements specific to TP1 including electrical current and voltage at REESS or inverter inputs, ICE speed, intake manifold pressure, and fuel flow rate, and DC/DC converter measurement options. The amendments ensure consistency with other paragraphs in the regulation such as para. 6.9.2.1. and Annex 1, Appendix 2, 9.1.1.

Status update on Euro 7 implementation for light-duty and heavy-duty vehicles. For LDV (M₁, N₁), application begins 30 months after Euro 7 entry into force for new types (29 November 2026) and 42 months for all new vehicles (29 November 2027). For HDV (M₂, M₃, N₂, N₃, O₃, O₄), application begins 48 months after entry into force for new types (29 May 2028) and 60 months for all new vehicles (29 May 2029). Small Volume Manufacturers comply from 1 July 2030 (M₁, N₁) and 1 July 2031 (M₂, M₃, N₂, N₃). Brake emissions apply 1 January 2030 for LDV and 1 January 2030–1 January 2035 for HDV. Tyre abrasion (UN R186) applies 1 July 2028 for C1 class tyres, 1 April 2030 for C2 class, and 1 April 2032 for C3 class.

Document presents preliminary views on minimum performance requirements for in-vehicle battery durability under Euro 7 heavy-duty vehicle standards. It outlines implementation timeline for the OMNIBUS proposal in first and second phases, with application dates of 1 January 2030 for the first phase and 1 January 2035 for the second phase. Brake emissions and tyre abrasion requirements are addressed, including UN Regulation No. 186 application dates for C2 and C3 class tyres. Reporting and review provisions under Article 18 are included. The document notes that the order of items and timeline indications are preliminary and for discussion purposes only.

Proposal to amend GTR 25 by modifying requirements for State-of-Certified Energy (SOCE) monitors, battery performance, and in-use verification procedures for heavy-duty electrified vehicles. The amendment refines test procedures for usable battery energy determination through four methods (Methods 1a, 1b, and 2, and an alternative chassis dynamometer method), updates measurement requirements and accuracy specifications, clarifies vehicle selection criteria during certification and Part A verification to establish worst-case configuration by highest UBE value, increases temperature tolerance during test soak to 7°C for improved applicability, revises Annex 2 to reflect additional regional regulatory requirements, and improves descriptions of test methods to enhance applicability and accuracy of results. Implementation occurs following entry into force as specified in regional provisions.

JRC contribution to the EVE IWG on GTR No. 25 virtual distance verification. The document presents verification procedures based on energy throughput and virtual distance for stationary and dynamic tests. It discusses reading on-board values including virtual distance, propulsion energy, total energy throughput, and odometer readings. The document identifies outstanding questions regarding feasibility of using on-board values versus measured values, separation of stationary and dynamic test cases, and measurement approaches for V2X, PTO, and non-traction purposes energy.

Proposal to amend para. 1.1.3. to remove language requiring agreement with authorities regarding methods for customer values when specific methods are applied, delete redundant text already described in para. 1.1.1., and amend paras. 2.1.2. and 3.1.2. to clarify that usable battery energy values including UBE measured are considered as positive values.

Proposal to amend para. 2.45. to clarify that usable battery energy including UBEmeasured is considered as a positive, and amend para. 3.1.2. to specify that measured SOCR and measured SOCE values shall be determined by dividing measured values for electric range and UBE by certified values for electric range and UBE respectively, expressed in per cent, and that indicator values collected after the verification test procedure shall not be considered in the Part A verification.

OICA presents comments and proposals on UN GTR 25 discussion items for the 100th session of the EVE informal working group. Topics include test procedures and approaches, a standardized 50 km virtual driving distance for Power Take-Offs, simplification of calculation formulas, a PTO family concept with predefined power classes, handling of body builder PTOs, minimum power thresholds, High Power Resistor energy consideration, measurement accuracy, and default values for auxiliaries. OICA indicates agreement on certain items, identifies areas requiring correction or further discussion, and outlines Phase 3 priorities.

These Terms of Reference establish the UNECE EV fast- & smart-charging cluster as a joint activity of the WP.5 e-mobility Task Force and the IWG on EVE to promote user-friendly, safe and scalable adoption of fast and smart charging functionalities and their integration in the energy system. Task A develops a new WP.29 resolution on DC Fastest Recharge Power Curve for light duty vehicles through three phases: developing a harmonized procedure with validation testing, developing Key Performance Indicator requirements for consumer information, and investigating improvements and broadening to heavy duty applications. Task B inventories harmonization needs for other recharging capabilities and documentation through collecting existing standards, identifying discrepancies and gaps, and issuing a harmonized standardization and regulatory roadmap by vehicle category. The cluster operates under chairmanship from The Netherlands from January 2025 to October 2027 and technical secretariat from E-mobility Europe for the same period, meeting monthly virtually and twice yearly in hybrid or in-person format.

Proposal to amend UN GTR No. 21 in a consolidated version. The document establishes a worldwide harmonized method to determine system power rating for electrified light-duty vehicles comparable to traditional measures for conventional vehicles. It specifies two test procedures: TP1 based on measured electrical power and estimated ICE power, and TP2 based on measured torque and speed at axles or wheel hubs. The GTR introduces the reference point concept to identify where mechanical power is first produced from stored energy, establishes applicability rules for each procedure based on powertrain architecture, requires manufacturers to provide verifiable K factors and hybrid power flow descriptions, mandates five test repetitions with averaging of the last four results, and adds internal validation criteria. The procedure aligns measurement accuracies with UN GTR No. 15 and permits use of validated onboard data where accuracy is demonstrated.

Working draft proposal to:

• Establish harmonized methods to determine in-vehicle battery durability performance of heavy-duty pure electric vehicles and heavy-duty off-vehicle charging hybrid electric vehicles,
• Introduce State-of-Certified-Energy monitors that estimate battery health throughout vehicle lifetime,
• Define minimum performance requirements for battery durability in an optional annex,
• Establish test procedures for usable battery energy determination via test track driving, on-road driving, bidirectional power supply systems, or chassis dynamometer testing,
• Implement a two-part in-use verification process verifying monitor accuracy and battery durability compliance through statistical sampling,
• Collect field data to inform future revisions of performance requirements.

Draft proposal to:

• Introduce requirements for State-of-Certified Energy and State-of-Certified Range monitors that operate for the full lifetime of vehicles,
• Set minimum performance requirements for battery durability expressed as SOCE values of 80 percent at 5 years or 100,000 km and 70 percent at 8 years or 160,000 km for categories 1-1 and 1-2, and 75 percent and 65 percent respectively for category 2 vehicles,
• Establish a two-part in-use verification process with Part A verifying monitor accuracy through statistical method on minimum 3 vehicles and Part B verifying battery durability through remote collection of on-board values from sample of at least 500 vehicles with pass decision requiring 90 percent or more of values above MPR,
• Introduce Part C verification of reported virtual distance for V2X applications with pass/fail decision based on statistical procedure with maximum 4 vehicles.

Report of the 99th session of the EVE IWG held September 8-9, 2026, covering discussions on UN GTR 21, UN GTR 22, and UN GTR 25. Topics included Japan’s proposal to revise UBE certified value calculations, China’s proposal to incorporate fuel cell vehicles under GTR 21, China’s proposals for vehicle category modifications and minimum performance requirements under GTR 25, Japan’s proposals for measurement requirements under GTR 21, assessment of alternative test methods for GTR 25, and open items across all three GTRs. The group confirmed target dates of March 2028 for GTR 21 and GTR 25 amendments.

Proposal to revise provisions and formulas in GTR 22 Annex 3, paras. 2.1.2. and 3.1.2., UN R154-04 Annex C1, Appendix 2, paras. 2.1.2. and 3.1.2., and UN R83-09 Appendix 5, para. 3.1.2. to make UBE_certified values positive and select the maximum absolute value. The document EVE-63-11e addresses concerns that when the interpolation method is applied under GTR No. 15 / UN R154, UBE_certified values become negative, contrary to regulatory intent. Revisions ensure UBE_certified is determined by selecting the maximum absolute value amongst vehicle H, vehicle L, and vehicle M where applicable.

The agenda addresses UN GTR 22, UN GTR 21, and UN GTR 25, with discussions on fuel cell vehicle proposals, open items, verification results, alternative test methods, and battery replacement provisions. A reminder notes that UN GTR 25 amendment 2 must be submitted to GRPE-96 by December 2026.