Technical Articles

What are the EV Charging Standards?

The widespread adoption of electric vehicles (EVs) has prompted the development of various charging standards to ensure compatibility and ease-of-use for EV owners. These standards define the technical aspects of EV charging equipment, allowing manufacturers, utilities, and consumers to effectively communicate and operate their charging infrastructure. In this article, we will explore the most common EV charging standards in use today.

J1772: The North American Standard

J1772 is the standard used for AC Level 1 and Level 2 charging in North America. It was developed by the Society of Automotive Engineers (SAE) and has become the de facto standard for charging electric cars. J1772 connectors have five pins that provide power, control signaling, and ground connections. This standard supports single-phase AC charging with power levels up to 19.2 kilowatts, making it suitable for overnight charging at home or at public charging stations.

CCS: Combining DC Fast Charging with J1772

The Combined Charging System (CCS) is an extension of the J1772 standard that allows for DC fast charging by combining both AC and DC charging capabilities. CCS connectors add two additional pins to the standard J1772 connector, enabling high-power DC charging. With CCS, electric vehicles can charge at power levels exceeding 100 kilowatts, significantly reducing charging times compared to AC charging. CCS is widely adopted by many automakers in North America and Europe to support long-distance travel and extend the range of EVs.

CHAdeMO: The Early DC Fast Charging Standard

CHAdeMO is a DC fast charging standard developed by the CHAdeMO Association, primarily for Japanese automakers. It uses a unique connector design and was the first widely available fast charging standard. CHAdeMO connectors can deliver up to 62.5 kilowatts of power, allowing for quick charging on compatible vehicles. Although it is less common in North America, many CHAdeMO chargers can still be found in certain regions, and some EV models continue to support this standard.


The development and adoption of EV charging standards have played a crucial role in making electric vehicle ownership more accessible and convenient. Standards like J1772, CCS, and CHAdeMO have defined the technical specifications for charging equipment, enabling interoperability between different EV models and charging infrastructure. As the EV market continues to grow, it's important for stakeholders to collaborate and establish harmonized global standards that provide seamless charging experiences for all EV owners.



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