Comparison of CHAdeMO and CCS Charging Standards and Regional Applications
1. Connector Design and Technical Background
CHAdeMO (Charge de Move) was developed by Japanese automakers (Nissan, Mitsubishi, etc.) in collaboration with Tokyo Electric Power Company as a DC fast-charging standard. It features a unique square-shaped connector (four-pin design), with early versions supporting up to 62.5 kW. The CHAdeMO 3.0, released in 2020, introduced bidirectional charging (V2X) and increased power capacity to 400 kW. Its core technology relies on an independent DC charging system, requiring vehicles to be equipped with separate high-voltage circuits.
CCS (Combined Charging System) was developed by a coalition of European and North American automakers and comes in two variants:
CCS1: Based on the North American J1772 AC connector with additional DC pins, used in the North American market.
CCS2: Built upon the European Type 2 AC connector, expanded with DC pins, supporting three-phase AC power, with a maximum power output exceeding 350 kW.
CCS achieves "one-port compatibility for AC and DC charging", eliminating the need for additional hardware and offering higher integration efficiency.
2. Charging Capability and Functional Differences
CHAdeMO:
Focuses exclusively on DC fast charging, with power levels ranging from 50–150 kW in versions 1.0–2.0, and up to 400 kW in version 3.0.
Supports bidirectional charging features, such as Vehicle-to-Grid (V2G) and Vehicle-to-Home (V2H).
Requires vehicles to have additional dedicated circuits, increasing manufacturing costs.
CCS:
DC fast charging capabilities typically range from 150–350 kW, with some ultra-fast charging stations exceeding 500 kW.
Implements ISO 15118 for plug-and-charge functionality and smart load management.
Compact structure, integrating both AC and DC charging within the same port, reducing adaptation costs for automakers.
3. Regional Market Distribution
CHAdeMO-dominated regions:
Japan: The standard is widely adopted by domestic automakers (Nissan, Mitsubishi), with over 70% coverage in public charging stations.
South Korea: Early Hyundai and Kia EV models (e.g., Kona EV) supported CHAdeMO.
Europe: Some pre-2018 charging stations still include CHAdeMO, but new installations primarily use CCS2.
CCS-dominated markets:
CCS1:
North America: Competing with Tesla’s NACS, used in select public fast-charging networks (e.g., Electrify America).
CCS2:
European Union: Regulatory mandates require all public charging stations to use CCS2. Tesla’s European models have fully switched to CCS2.
Oceania: Australia and New Zealand have phased out CHAdeMO and fully transitioned to CCS2.
Emerging Markets: India and Southeast Asia prioritize CCS2 in newly built charging networks.
China: Foreign brands (e.g., BMW, Mercedes-Benz) support CCS2, but the national GB/T standard remains dominant.
4. Technological Evolution and Market Trends
CHAdeMO:
Declining global influence due to limited adoption outside Japan; European automakers have completely shifted to CCS2.
V2X features (such as V2G) face challenges in adoption due to high costs, with only a few models (e.g., Nissan Leaf) supporting the feature.
CCS:
Backed by EU policies, making it the global mainstream standard. The EU aims to install 1 million CCS2 charging stations by 2025.
Supported by a coalition of automakers (Volkswagen, Ford, etc.), accelerating the rollout of ultra-fast charging networks, with power levels moving toward the megawatt range.
Tesla has adopted CCS2 in Europe, while in North America, it remains compatible with CCS1 through adapters, further solidifying CCS’s dominance.
5. Key Differences Summary
The fundamental differences between CHAdeMO and CCS lie in their technical approach (independent DC system vs. AC/DC hybrid interface) and industry ecosystem (Japan-centric vs. open European/North American alliance).
Due to regional limitations and higher costs, CHAdeMO is becoming increasingly marginalized, while CCS is emerging as the global standard due to its policy enforcement and broader compatibility. In the future, as demand for ultra-fast charging rises and V2G technology becomes more widespread, CCS is expected to dominate smart grid integration, while CHAdeMO may retain only limited adoption in Japan.
