The 33rd China International Exhibition on Electric Power Equipment and Technology
Shanghai International Energy Storage Technology Application Expo / Hydrogen Energy Expo
EV charging infrastructure encompasses the physical charging equipment, grid connections, communication systems, and management platforms that enable electric vehicles to be charged from the electricity grid. Charging equipment ranges from slow AC chargers (Level 1: 1.4–3.7 kW; Level 2: 7–22 kW) for residential and workplace charging to fast DC chargers (50–350 kW) for public charging stations and highway rest stops. Ultra-fast charging stations (350–600 kW) are emerging for commercial vehicle fleets and premium passenger cars. China has the world's largest EV charging network, with over 9 million public charging points by 2024, operated by companies including State Grid, Southern Grid, TELD, Star Charge, and BYD. Smart charging management systems optimise charging schedules to reduce grid impact, minimise electricity costs, and enable vehicle-to-grid (V2G) services.
5 Key Questions About EV Charging Infrastructure
EV charging equipment is classified by power level and current type: AC slow chargers (Mode 2, 1.4–3.7 kW) use a standard household socket with an in-cable control box, suitable for overnight residential charging; AC semi-fast chargers (Mode 3, 7–22 kW) use a dedicated charging point with a Type 2 or GB/T 20234.2 connector, suitable for workplace and public charging; DC fast chargers (50–150 kW) use a dedicated charging station with a CCS, CHAdeMO, or GB/T 20234.3 connector, enabling 80% charge in 30–60 minutes; and DC ultra-fast chargers (150–600 kW) enable 80% charge in 10–20 minutes for capable vehicles.
Vehicle-to-grid (V2G) technology enables electric vehicles to discharge stored energy back to the grid, transforming EV batteries into distributed grid storage assets. V2G requires bidirectional charging equipment (capable of both charging and discharging), vehicle battery management systems that support bidirectional operation, and grid management platforms that coordinate V2G dispatch. V2G can provide frequency regulation, peak shaving, and demand response services, generating revenue for EV owners while supporting grid stability. China is piloting V2G in several cities, with State Grid and Southern Grid developing V2G standards and pilot programmes.
Unmanaged EV charging — particularly fast charging during evening peak hours — can significantly increase peak demand on distribution transformers and feeders, requiring costly grid upgrades. Smart charging management systems address this challenge by shifting charging to off-peak periods (overnight or midday when solar generation is high), coordinating multiple chargers to stay within transformer capacity limits, and responding to grid price signals. The aggregation of managed EV chargers into virtual power plant platforms enables them to provide demand response services, turning potential grid stress into grid support.
China uses national standards GB/T 20234 for EV charging connectors and GB/T 27930 for communication protocols between charging equipment and vehicles. GB/T 20234.1 covers AC charging connectors; GB/T 20234.2 covers AC charging plugs and sockets; GB/T 20234.3 covers DC charging connectors. These standards differ from international standards (IEC 62196 Type 2, CCS, CHAdeMO), requiring China-specific charging equipment for domestic vehicles. China is working on international harmonisation of charging standards, particularly for export markets.
Public EV charging in China operates primarily on a service fee model: operators charge a per-kWh service fee (typically RMB 0.3–0.8/kWh) on top of the electricity cost, with total charging costs of RMB 0.5–1.5/kWh depending on location and time of day. Large operators including TELD, Star Charge, and State Grid achieve profitability through high utilisation rates at premium locations. The market is consolidating as smaller operators struggle with low utilisation and high capital costs. New business models including charging-as-a-service, battery swapping (for commercial vehicles), and integrated charging-storage-solar stations are emerging.
Key Takeaways
EV charging infrastructure is one of the fastest-growing segments of China's energy sector, driven by the world's largest EV market and government policy support. Smart charging and V2G technology are transforming EV chargers from simple loads into flexible grid assets. ES Shanghai showcases the full EV charging value chain — from charging equipment manufacturers to grid integration specialists and fleet management platform providers.
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