CCS1 vs CCS2 Explained: Full Comparison of EV Charging Standards (2026) 

With the widespread adoption of electric vehicles, the CCS fast-charging standard has developed into two regional versions: CCS1 and CCS2. While their underlying protocols are similar, they differ significantly in terms of hardware, power ratings, and target markets. This article will provide a comprehensive comparison of the two.

What is a CCS1 connector?

CCS1 (Combo 1) is a North American DC fast-charging connector based on the Type 1 AC plug, with two additional thick DC pins added. It combines AC and DC charging capabilities and is commonly used for DC fast charging in the 50–250 kW range, depending on the charging station and vehicle capability. It is widely used in the United States and Canada, supported by a wide network of public CCS charging stations.

What is a CCS2 connector?

CCS2 (Combo 2) is based on the European Type 2 AC plug, with two additional thick DC pins added at the bottom. A single connector supports both three-phase AC charging and high-power DC fast charging, typically ranging from 150–350 kW depending on infrastructure and vehicle configuration. It is the mainstream standard in Europe and Southeast Asia.

Key Differences Between CCS1 and CCS2

CCS1 and CCS2 differ significantly in hardware, performance, and regional usage. The following is a detailed comparison of the two based on six dimensions:

Physical Design

CCS1: Based on the U.S. Type 1 standard, featuring 5 AC pins + 2 DC pins, a round connector head, and a manual unlock button.

CCS2: Based on the European Type 2 standard, with 7 AC pins + 2 DC pins, a flat D-shaped connector head, and no button—it relies on an onboard electronic lock.

Technical Specifications

Current and Voltage: Both CCS1 and CCS2 operate at up to 1000V DC. CCS1 and CCS2 systems typically support current levels up to 200A, with higher values (up to 350–500A) possible in liquid-cooled high-power charging systems depending on cable and infrastructure design.

AC Charging: CCS1 is typically limited to 7.4–19.2 kW depending on onboard charger configuration; CCS2 supports up to 43 kW with three-phase power.

DC Fast Charging: CCS1 typically ranges from 50–250 kW depending on infrastructure and vehicle capability; CCS2 typically ranges from 50–350 kW, with ultra-fast systems reaching up to 500 kW.

Compatibility

Hardware Compatibility:The plug geometries and pin configurations of CCS1 and CCS2 differ, making them incompatible for direct use. Cross-region compatibility typically requires a dedicated adapter depending on the vehicle and charging infrastructure. In AC charging scenarios, a Type 1 to Type 2 adapter may be used where supported.

Protocol Compatibility: The underlying charging communication protocols are consistent, and the charging interaction logic is similar; regional differences exist only in locking and power supply logic.

Vehicle and Station Compatibility: CCS1 is compatible with North American and Korean vehicles, as well as local charging stations; CCS2 is compatible with European, Australian, and Southeast Asian vehicles and their corresponding charging infrastructure.

Market Preferences

CCS1: Primarily used in the United States, Canada, and South Korea, where it is compatible with local single-phase power grids. Currently, the North American market is gradually adopting the NACS standard, leading to a steady decline in new CCS1 infrastructure.

CCS2: As the official unified charging standard of the European Union, it is widely adopted in regions with three-phase power grids, such as Europe, the United Kingdom, Australia, and Southeast Asia, where the number of charging stations continues to grow.

Future Trends and Development

CCS1: As NACS gradually gains traction in North America, fewer new vehicles will be equipped with CCS1; it will be used only for existing infrastructure during the transition period, limiting the development of V2G.

CCS2: It remains the mainstream standard in Europe and other regions, supporting high-power liquid-cooled fast charging, plug-and-charge, and V2G, with continuous iterations and upgrades.

CCS1 vs CCS2 Quick Comparison Table

The table below summarizes the key technical and regional differences between CCS1 and CCS2.

Advantages and Disadvantages of CCS1

Advantages

Grid Compatibility: Designed specifically for North America’s single-phase residential power grid, charging stations can be installed in ordinary homes without major electrical modifications, making home charging wiring accessible.

Extensive Infrastructure: A large-scale CCS1 charging network has been established across North America, covering highways, commercial districts, and residential communities, ensuring broad infrastructure coverage.

Low Installation Costs: Basic slow-charging equipment features a simple design and highly interchangeable components, making the overall cost of equipment procurement and on-site installation more affordable.

Regional Standardization: It was once the unified official fast-charging standard in North America and South Korea. Vehicle models and charging stations within these regions adhere to uniform specifications, eliminating issues with conflicting local connectors.

Disadvantages

Low charging power: The AC charging cap is only 7.4 kW, making slow charging very time-consuming; DC fast charging is limited to a maximum of 250 kW, a significant difference in charging power compared to CCS2.

Limited compatibility: Major North American automakers have fully transitioned to the NACS interface, and new models generally no longer come standard with CCS1; it will eventually be replaced by the new standard.

Advantages and Disadvantages of CCS2

Advantages

Charging Flexibility: A standardized charging interface mandated by the European Union, compatible across Europe, Australia, and many countries in Southeast Asia. Cross-border travel requires no change of charging equipment, and regional interface standards are unified.

Faster Charging Speeds: Supports up to 43 kW three-phase AC charging and liquid-cooled DC fast charging of over 350 kW, significantly reducing total charging time and offering charging efficiency far superior to CCS1.

Well-Developed Infrastructure: A vast network of CCS2 public charging stations is deployed across Europe’s highways, shopping centers, and residential areas, providing high coverage density.

Disadvantages

High residential installation costs: To enable 43 kW three-phase AC charging in a standard single-phase residential setting, three-phase wiring must be installed, resulting in higher construction and retrofit costs.

Regional Limitations: Mainstream models in North America are shifting to NACS, and there are few CCS2 public charging stations in the region, resulting in limited charging convenience when traveling to the U.S.

Difficulty Adapting Older Residential Areas: Many older residential buildings lack three-phase power infrastructure and can only use low-power single-phase AC, preventing them from fully utilizing CCS2’s charging capabilities.

Conclusion: There is no absolute superiority or inferiority between CCS1 and CCS2; they are simply suited for different regional power grids and driving scenarios. Cross-standard compatibility can be easily resolved using compliant adapters. ZENCAR supplies fully compatible CCS1/CCS2 chargers and safe adapters to simplify cross-connector charging.

FAQ

Are CCS1 and CCS2 compatible?

CCS1 and CCS2 have physically incompatible plugs and are not directly compatible. While their underlying communication protocols are similar, cross-interface charging requires a dedicated adapter.

Can I charge a CCS1 vehicle using a CCS2 charging station?

Direct charging is not possible because the physical structures of the two connectors do not match; a dedicated CCS2-to-CCS1 adapter is required to enable charging.

Will CCS1 be replaced by CCS2?

CCS1 will not be replaced by CCS2. The two standards are specific to different regions: in North America, CCS1 is gradually being replaced by NACS, while CCS2 has long been the dominant standard in overseas markets. Existing CCS1 equipment will continue to coexist during the transition period.

Can CCS charge all electric vehicles?

The CCS interface is only compatible with vehicles equipped with CCS; it cannot directly charge electric vehicles with other types of connectors.

Is CCS2 better than CCS1?

CCS2 is generally superior to CCS1 in terms of charging power, expanded functionality, global compatibility, and future development potential.

What types of connectors do CCS1 and CCS2 use?

CCS1 is a 5-pin AC + 2-pin DC combined connector designed for North America’s single-phase power grid, while CCS2 is a 7-pin AC + 2-pin DC combined fast-charging connector that supports three-phase power supply.

Is it safe to use a CCS adapter?

It is safe to use CCS-specific adapters that are certified to meet compliance standards and match the rated power; however, low-quality, non-standard adapters pose safety hazards such as overheating and short circuits.

Which vehicles use CCS1?

Non-Tesla all-electric models sold in North America and South Korea before 2024—including those from Ford, General Motors, Hyundai, Kia, BMW, Mercedes-Benz, Volkswagen, and Rivian—come standard with a CCS1 fast-charging port.

Which vehicles use CCS2?

Pure electric vehicles sold in Europe, the UK, Australia, India, and other regions—including models from Volkswagen, BMW, Mercedes-Benz, Audi, Porsche, Hyundai, Kia, Volvo, and the European-spec Tesla—come standard with a CCS2 fast-charging port.

Should I choose a CCS1 or CCS2 electric vehicle?

If you plan to drive primarily in North America or South Korea, choose a CCS1 model. If you frequently travel to Europe or other countries overseas, prioritize a CCS2 model.