On March 1, the nation's first general technical standard for vehicle-to-grid (V2G) interactive microgrids—the "General Rules for Vehicle-to-Grid Interactive Smart Microgrids"—officially came into effect. This standard was jointly compiled by the State Grid Suzhou Power Supply Company and the State Grid (Suzhou) Urban Energy Research Institute, and released by the Jiangsu Provincial Society of Electrical Engineering in January this year.

With the rapid growth in the number of new-energy vehicles, Jiangsu's charging load is increasing day by day. Guiding electric vehicle charging resources to participate in grid regulation has become an important way to improve grid flexibility and the capacity for renewable energy integration.

In recent years, V2G microgrids, such as integrated photovoltaic-storage-charging-swapping stations, have been gradually implemented in Jiangsu. However, due to the lack of unified technical standards, problems such as difficulties in equipment coordination and non-standardized safe operation have arisen. The new standard establishes a full-chain technical system from four aspects, including overall requirements and core systems. It clarifies the technical requirements for 10 key systems, such as charging and V2G bidirectional interaction, and introduces intelligent operation modes such as virtual capacity expansion and active support, providing a unified "instruction guideline" for microgrid construction and operation. The first phase of the Qingduntang Supercharging Station in Changshu, Suzhou, was put into operation in October 2024, and the second phase in October 2025. It is Changshu's first integrated "photovoltaic-storage-charging" supercharging station, with 22 charging bays, including 20 fast-charging bays and two liquid-cooled supercharging bays. The next step will be to add V2G charging stations according to the new standard, upgrading it into a more comprehensive vehicle-grid interactive smart microgrid.

"The six supercharging stations planned for construction this year will all be built according to the new standard, achieving upgrades in interactivity and intelligence," said a relevant person in charge of Luteng Company.

Zhao Meng, a specialist at State Grid Suzhou Power Supply Company, believes that the implementation of this standard can unify technical specifications, promote the transformation of charging stations from single charging services to source-grid-load-storage collaborative interaction, improve charging guarantee capabilities and operational efficiency, and enhance the station's friendly support and flexible adjustment capabilities for the grid, providing a replicable practical model for the high-quality development of regional new-energy vehicle charging and swapping facilities.