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.

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 establish minimum performance requirements for in-vehicle battery durability of pure electric vehicles and off-vehicle charging hybrid electric vehicles, requiring manufacturers to install State-of-Certified Energy and State-of-Certified Range monitors, set minimum allowable SOCE values of 80% for categories 1-1 and 1-2 vehicles and 75% for category 2 vehicles at 5 years or 100,000 km (whichever comes first) and 70% and 65% respectively at 8 years or 160,000 km, implement a two-part in-use verification process to verify monitor accuracy and battery durability through statistical methods and remote data collection, allow manufacturers to declare higher performance requirements, and include verification of reported virtual distance for vehicles with V2X functionality or non-traction purposes.

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.

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.

Technical report on the development of Amendment 2 to UN GTR No. 22. The GTR establishes a harmonized methodology for in-vehicle battery durability through battery health monitoring and minimum performance requirements. Development involved defining state of certified energy and state of certified range metrics, establishing minimum performance requirement values, creating family definitions, developing statistical procedures for on-board monitor verification, and addressing vehicle-to-grid usage through virtual distance calculations. Phase 3 revisions included defining Part C family criteria for virtual distance monitor verification, boundary conditions for verification testing, and alignment with UN Regulations 154 and 83.

UN GTR No. 22 on In-vehicle Battery Durability for Electrified Light Duty Vehicles establishes harmonized requirements for monitoring and verifying minimum battery durability performance of pure electric vehicles and off-vehicle charging hybrid electric vehicles of categories M₁ and M₂. Manufacturers must install State-of-Certified Energy (SOCE) and State-of-Certified Range (SOCR) monitors for the vehicle lifetime. Battery energy-based minimum performance requirements specify that vehicles of categories 1-1 and 1-2 must retain 80 per cent SOCE for 5 years or 100,000 km and 70 per cent for 8 years or 160,000 km; category 2 vehicles must retain 75 per cent and 65 per cent respectively. In-use verification comprises Part A verification of monitor accuracy using statistical methods, Part B verification of battery durability through remote data collection, and Part C verification of reported virtual distance. Manufacturers may declare higher performance requirements. Virtual distance may be reported for vehicles with Vehicle-to-Grid functionality or category 2 vehicles used for non-traction purposes.

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 presentation summarizes EU-Commission JRC contributions to the EVE IWG regarding light-duty vehicle data for minimum performance requirements based on EVE-30-12, EVE-34-16, EVE-41-03, EVE-96-06, EVE-32-13e, EVE-74-21, and EVE-88-22. It compares JRC TEMA ageing predictions with real-world field data from multiple sources including Geotab analysis of over 22,700 electric vehicles showing average annual degradation of 2.3%, Tesla data indicating approximately 1% degradation per 40,000 km, Nissan Leaf data from Flip The Fleet comprising 2,311 vehicles, and experimental data from Canada on Tesla Model S and truck batteries. Key findings include that high-power DC fast charging causes degradation rates up to twice that of low-power charging, hot climates increase degradation 0.4% annually, and high mileage vehicles demonstrate cumulative calendar and cycle ageing effects while generally meeting GTR 22 battery energy retention requirements of 80% at five years and 100,000 km.

Proposal to add two new definitions to para. 3.30., modify para. 5.1. to require manufacturers provide a procedure for achieving recent SOCE/SOCR monitor updates, modify Annex 1 to establish monitoring based on new parameters rather than the 50 per cent state-of-charge threshold, and add mandatory values to Annex 2 including State of Certified Energy Readiness Status, Energy Storage System Recent Depth of Discharge Counter, and Preconditions for Recent Battery Capacity Update, based on GRPE/2026/5 and EVE-97-04e.

Proposal to amend para. 6.5. to specify that a verification of reported virtual distance is only required if the manufacturer requests to apply the virtual distance option, to require a test with adequate and representative vehicle use in V2X or non-traction purposes to verify accuracy of reported virtual distance increase, and to permit the verification of Part C for vehicles in the same virtual distance family to be combined between different Contracting Parties with their agreement, with such Contracting Parties considered as a single authority for verification purposes.

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.

Proposal to amend Amendment 2 to UN GTR No. 22: Modify para. 5.2. to define virtual distance calculation and add requirements for reporting virtual distance by vehicles with V2X functionality or Category 2 vehicles used for non-traction purposes, add new para. 5.2.1. specifying virtual distance determination, add para. 6.1.3. defining Part C family criteria for virtual distance verification, add para. 6.5. establishing Part C verification procedure for reported virtual distance with test conditions including environmental temperature 23°C ± 5°C, initial battery SOC according to normal charging procedure, discharge testing at highest available power, test duration of 50 km virtual distance or 2 hours, and pass/fail criteria requiring reported virtual distance not more than 5 per cent higher than measured virtual distance, add para. 6.5.2.1. with statistical decision chart for Part C pass/fail determination based on cumulative sample size and failed result counts, revise para. 6.1.4. to add family identifier format for virtual distance families, add para. 52.a. through 52.e. in the Statement of Technical Rationale documenting Phase 3 developments including family criteria for Part C verification, boundary conditions for virtual distance verification test with environmental temperature requirements and discharge test options based on kilometres or hours, OVC-HEV UBE correction in Annex 3, and additional regional regulation requirements in Annex 2, and add flow chart Figure 3 for Part C verification process.

The presentation reports results from performance-based models for electric passenger vehicles and electric vans, analyzing capacity retention and capacity fade at 5, 8, and 10 years and at 100,000 km, 160,000 km, and 200,000 km driving distances. Results show capacity retention exceeding 60 per cent at 10 years and 200,000 km for vans with Li-Ion NCM-LMO (2015) battery technology, and exceeding 65 per cent for battery electric vehicles under the same conditions.

The document presents Norway’s electrification progress for light duty vehicles (LDVs) and heavy duty vehicles (HDVs). Norway has 994,000 electric LDVs and 5,300 electric HDVs from a total fleet of 3.4 million LDVs and 73,000 HDVs. In April 2026, EV market share reached 98.6 percent with 107 municipalities achieving 100 percent market share. The document reports EVs represent 2-7 percent of registered vehicle fires, with fossil fuelled vehicles accounting for up to 90 percent. Research findings indicate battery degradation is driven by operating conditions, with cold climate introducing dual effects and battery management systems being key durability drivers.

GTR 22 proposes introducing a State of Certified Energy (SOCE) Readiness Status to determine when sufficient enabling conditions exist for accurate battery State of Health calculations. Manufacturers shall make SOCE values easily available to vehicle owners via dashboard, infotainment, or mobile application and provide procedures for owners to achieve recent updates. GTR 22 shall include mandatory parameters: State of Certified Energy Readiness Status, Energy Storage System Recent Depth of Discharge Counter, and Preconditions for Recent Battery Capacity Update, removing quantitative specifics dependent on energy storage chemistry and time duration references from existing annexes.