North American Charging Standard
Electric vehicle connector standard
North American Charging Standard
The North American Charging Standard (NACS), also known as the North American Charging System and officially designated SAE J3400, is an electric vehicle (EV) charging connector originally developed by Tesla, Inc. and standardized by SAE International. NACS uses a single compact connector for both AC and fast DC charging, sharing common pins for both modes, unlike other systems that require different or larger connectors for DC charging. Tesla introduced the physical connector design, originally called the Tesla charging connector, with the Model S in 2012. However, it was not until 2021 that Tesla vehicles began supporting the expanded communications protocol that is specified as part of NACS. In 2022, Tesla opened the standard to other manufacturers, naming it the North American Charging Standard. SAE International formally standardized it in 2023 as the North American Charging System with official designation as SAE J3400. Between May 2023 and February 2024, most major automakers announced...
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