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.

Report on the 95th GRPE session presenting progress updates for UN GTR No. 21 (Determination of Electrified Vehicle Power), UN GTR No. 22 (In-vehicle Battery Durability for Electrified Light-Duty Vehicles), and UN GTR No. 25 (In-vehicle Battery Durability for Electrified Heavy-Duty Vehicles). The IWG on EVE reported on Phase 4 objectives and amendments for GTR 21 and 22, with consideration targets of March 2028, and Phase 3 amendments for GTR 25 with consideration target of March 2027. Future work includes investigations into charging power curves, development of a new WP.29 resolution on DC Fast Charge Power Curve performance, and an inventory on harmonization of recharging capabilities.

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.

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.

Terms of Reference for the UNECE EV fast- & smart-charging cluster, a joint activity of WP.5 e-mobility Task Force and the IWG on EVE. The cluster aims to promote user-friendly, safe and scalable adoption of fast and smart charging functionalities of electric vehicles and their integration in the energy system. Task A develops a new WP.29 resolution on DC Fast Charge Power Curve (FCPC) of electric vehicles in three phases: Phase 1 establishes a harmonized test procedure for light duty vehicles; Phase 2 develops requirements for consumer information and minimum performance requirements; Phase 3 investigates expansion to heavy duty applications. Task B inventories the need for harmonization of other recharging capabilities and recharging documentation, including collecting existing international standards and initiatives, identifying discrepancies and gaps, and issuing a harmonized standardization/regulatory roadmap for smart and bi-directional charging of EVs by vehicle category. Chairmanship is held by The Netherlands from January 2025 to October 2027.

This document addresses open issues regarding the Fast Charge Power Curve Resolution draft still under technical discussion where no consensus has been reached by the F&SC Cluster at submission of ECE/TRANS/WP.29/GRPE/2026/52. Open points cover measurement system requirements, test vehicle conditions, test preparation, vehicle preparation phase, parameter definitions, test evaluation tolerance criteria, and data processing and calculation of KPIs including maximum charging power, average charging power in 10–80% SoE range, power curve from 10% SoE to full charge, charging duration, and recharged energy or range in 10 minutes.

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 establish a harmonized method for determining system power ratings of hybrid electric vehicles and pure electric vehicles with multiple propulsion energy converters. The GTR specifies two test procedures (TP1 and TP2) to measure power at defined reference points analogous to conventional engine output shafts. TP1 measures electrical power and estimated ICE power; TP2 measures torque and speed at axles or wheel hubs. The procedure identifies reference points based on powertrain architecture, requires manufacturers to provide verifiable K factors for energy conversion efficiency, specifies measurement accuracy requirements, and includes validation criteria. The GTR applies to vehicles in categories M₁–M₂ and N₁–N₂ with maximum laden mass not exceeding 3,500 kg, excluding fuel cell vehicles.

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.

The 98th EVE IWG session held virtually on July 15, 2026, adopted the agenda and discussed Phase 4 priorities for UN GTR 22, including Minimum Performance Requirements, State of Certified Range, conditioning cycles, and mutual recognition. Japan proposed sharing Part C verification results with all Contracting Parties. The IWG reviewed UN GTR 21 and UN GTR 25 status, covering MPRs, energy throughput, virtual distance verification, and battery replacement provisions. OICA will present their MPR position at EVE 100 and share Part C verification results at EVE 99. Japan will consult on hosting 2027 meetings targeting the week of February 15th.

Proposal to improve efficiency of test methods by adding a reference to SAE J1349 or applicable local regulations, in addition to UN R85 and ISO 1585, to para. 6.1.2. and para. 6.1.2.1., and delete the requirement for Current integration measurement from para. 5.2.1. The additions provide consistency throughout the regulation and clarify that test results obtained in accordance with applicable local regulations are considered valid. The deletion removes an inconsistency whereby only Current integration measurement specifies a frequency of 20 Hz, while other items specify at least 10 Hz, and eliminates inapplicable wording carried over from UN R154.

Proposal to:

• Amend para. 2.1.(a) to include fuel cell electric vehicles that have more than one propulsion energy converter,
• Add fuel cell electric vehicle preparation requirements to para. 6.3. requiring run-in in accordance with manufacturers recommendations and at least 300 km of fuel cell run-in with hydrogen refueled in accordance with manufacturers recommendations,
• Amend para. 6.5. to include FCEVs in initial REESS charge requirements,
• Amend para. 6.8.1. to include fuel cell temperature in operational metrics to be monitored and recorded throughout the test,
• Retitle para. 2.6. as Fuel cell architectures, and add paras. 2.6.1., 2.6.2., and 2.6.3. specifying power determination reference points and test procedures for fuel cell architectures.

Technical report on the development of amendment 2 to UN GTR No. 21. The report describes the procedural background of the Informal Working Group on Electric Vehicle and the Environment (EVE), established in June 2012, and its subsequent work to develop a standalone UN GTR for determining electrified vehicle power. The report outlines revisions approved during 2022 and 2023, including deletion of Annex 3 reserved for a candidate method, addition of a family concept, definition of an additional TP1 method employing onboard signal distribution ratio, allowance of system bench testing for vehicles too powerful for chassis dynamometer testing, and adjustments to soak area temperature specifications, instrumentation requirements, and calculation tolerances.

Proposal to amend UN GTR No. 21 on system power determination:

• Establish a globally harmonized test procedure comparable to traditional engine power ratings for conventional vehicles,
• specify TP1 based on measured electrical power and estimated internal combustion engine power with electrical conversion efficiency factors,
• specify TP2 based on measured torque and speed at axle shafts or wheel hubs with mechanical conversion efficiency factors,
• require manufacturers to provide verifiable K conversion factors,
• remove dynamometer roller measurement options for TP2 in favor of torque and speed sensors or hub dynamometers,
• mandate fuel flow rate measurement for TP1,
• introduce the reference point concept to ensure comparable results across powertrain architectures,
• require five test repetitions with averaging of the last four,
• add applicability guidelines limiting TP1 or TP2 to specific architectures based on power flow characteristics,
• establish approval criteria for system bench facilities as alternatives to chassis or hub dynamometers in a new Annex 3.

The agenda for the Electric Vehicles and the Environment Informal Working Group 98th session scheduled for July 15, 2026, includes presentations on battery performance, discussions on UN GTR 21, UN GTR 22, and UN GTR 25 regulatory topics including minimum performance requirements, state of charge reference, readiness monitor and conditioning cycles, mutual recognition, fuel cell electric vehicles, highly integrated systems, energy throughput, normal usage indices, and battery replacement provisions. UN GTR 25 amendment 2 must be submitted to March 2027 GRPE with a December 2026 deadline.

This document, based on GRPE/2026/4, presents Amendment 3 to UN GTR 21 on determining system power of hybrid electric vehicles and pure electric vehicles with multiple propulsion energy converters. The GTR establishes two equivalent test procedures (TP1 and TP2) to measure system power comparable to traditional engine-based ratings. TP1 measures electrical power from the rechargeable electric energy storage system and estimated internal combustion engine power, applying electrical conversion efficiency factors. TP2 measures torque and speed at powered axle shafts or wheel hubs, applying mechanical conversion efficiency factors. The regulation requires manufacturers to provide hybrid power flow descriptions, energy conversion factors, and reference points for power measurement. Testing occurs on chassis dynamometers, hub dynamometers, or system bench facilities at fixed dynamometer speeds corresponding to maximum power conditions, with five repetitions conducted and results averaged. Applicability of each procedure depends on powertrain architecture and power flow characteristics. Amendment 3 introduces system bench testing as an alternative, strengthens measurement requirements, requires manufacturer-provided K factors rather than defaults, and establishes reference point concepts to ensure consistent results across different electrified powertrain architectures.

The Electric Vehicles and the Environment Informal Working Group held its 97th session on May 19, 2026. Discussions addressed UN GTR 22/25 including Norwegian EV demographics, a proposed Readiness Monitor concept for State of Certified Energy activities, and OICA terminology amendments replacing “monitor” with “assessment of virtual distance” in Part C. The group reviewed Phase 4 priorities for UN GTR 21 and UN GTR 25, including Minimum Performance Requirements, conditioning cycles, and lifetime requirements addressing disconnects between mileage and year thresholds. The next session is scheduled for June 16–17, 2026.