Technical Paper
Creation of the SAE J3400 North American Charging System Standard from Existing Specification to Technical Information Reference Document ASAP
2024-04-09
2024-01-2028
The SAE J1772 charging standard was first published in 1996, evolving to the present form factor (920vdc/500A capable couplers). In 2022 the existing Tesla North American Charging ‘standard’ (NACS) specification (TS-0023666) was published and offered without patent limitations to the level of detail in the published specification. https://digitalassets.tesla.com/tesla-contents/image/upload/North-American-Charging-Standard-Technical-Specification-TS-0023666 In 2023 several North American vehicle OEMs announced that they would offer the NACS inlet on their vehicles in 2025. The SAE J3400 North American Charging System standard work group was launched in July 2023 with the intent of publishing a first draft Technical Information Reference (TIR) by late 2023. https://www.sae.org/standards/content/j3400/ This paper covers the process and limitations of publishing that TIR, ASAP.