UN GTR No. 22 on In-vehicle Battery Durability for Electrified Light Duty Vehicles establishes harmonised 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.
Proposal to amend UN GTR No. 21 on system power determination:
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.