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Key Differences at a Glance
In the North American electric vehicle market, CCS1 and J1772 are the two most common charging interface standards. Although they appear similar on the surface, they have significant differences in terms of charging capability, compatibility, and future development direction.
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The J1772 interface features a simple circular design with five small contacts, presenting a sleek appearance. In contrast, CCS1 retains the basic structure of J1772 and adds two large DC contacts below, forming a unique “upper small and lower large” combination design. This design maintains backward compatibility while expanding fast-charging functionality.
Fundamental Difference in Power Transmission
J1772 is a pure AC charging standard, with a maximum power output typically limited to 19.2kW. This design is particularly suitable for overnight charging or workplace charging. In comparison, CCS1 integrates both AC and DC charging capabilities, supporting up to 350kW of DC fast charging, which reduces charging time from several hours to several tens of minutes.
Compatibility and Applicability
Vehicle Compatibility Comparison:
All electric vehicles in the North American market must be equipped with a J1772 interface, which is the basic configuration standard. In contrast, CCS1 has become an optional feature for most mainstream electric vehicles, including models from Chevrolet, Ford, and Volkswagen. However, it’s worth noting that Tesla uses an exclusive interface design in the North American market.
Actual Usage Scenario Differences:
J1772 is most suitable for home and office environments where rapid charging is not required. Its charging station installation and maintenance costs are low, making it an ideal choice for basic infrastructure. CCS1, on the other hand, is the standard for highway service areas and urban fast-charging stations, designed for scenarios where rapid charging is necessary for long-distance travel.
Charging Time Comparison:
Taking a common mid-size electric vehicle as an example:
J1772 charging from 20% to 80% takes 4-6 hours CCS1 charging takes approximately 30-45 minutes for the same range This time difference means that the two interfaces play completely different roles in users’ daily lives. Many electric vehicle users say, “I use J1772 for slow charging at home and CCS1 for fast charging on the go.”
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