State Grid Jiangsu takes the Lead in ITU Intl standard for EV sector

The International Telecommunication Union (ITU) recently approved the standardization proposal "Cross-Domain Settlement Framework for Electric Vehicle (EV) Grid-Connection Backup Services Based on Distributed Ledger Technology", submitted by the international standards team of State Grid Nanjing Power Supply Co (State Grid Nanjing). It is the world’s first ITU international standard in the field of grid-connection backup services.

Electric vehicles are evolving from mere modes of transportation into significantly distributed energy storage resources. According to the 15th Five-Year Plan (2026-30), China aims to achieve an aggregated adjustable charging capacity of approximately 50 million kilowatts through vehicle-to-grid (V2G) interaction by 2030, creating new opportunities for the accelerated development of the V2G industry.

Electric vehicle grid-connection backup is a key application of V2G technology. It uses electricity stored in the batteries of long-parked electric vehicles to provide short-term support to the power grid through orderly reverse power transmission. Participating entities can receive corresponding compensation based on their contributions.

Under the traditional settlement model, settlement relies on centralized bookkeeping and unified clearing. Vehicle owners must switch between different apps when changing operators, while each operator performs clearing and settlement procedures according to its own accounting system, with settlement cycles exceeding one day. There is no globally unified, secure, and transparent settlement framework.

In March, the international standards team of State Grid Nanjing turned its attention to Distributed Ledger Technology (DLT), which allows vehicle owners to bypass intermediary barriers and directly upload discharge data. Each transaction is jointly verified by all nodes across the network and takes effect immediately upon consensus, eliminating intermediate steps such as re-verification and clearing and enabling real-time crediting of earnings. Once the standard is implemented, vehicle owners will be able to complete trusted reconciliation and real-time settlement globally with a single authentication, with transparent and traceable charging/discharge data and clear earnings information.

State Grid Nanjing first submitted the new standard proposal to the ITU in June. The following month, the ITU-T SG21 plenary meeting was held in Geneva, Switzerland. With the conference chairman’s gavel coming down, the proposal was officially approved. It will provide a unified technical framework for trusted cross-domain settlement of electric vehicle grid-connection backup services, promote international consensus on China's technical solutions in the fields of V2G interaction and blockchain-integrated applications, and help bring "Jiangsu Power Intelligence" to the world stage.