- 4.5.1 For DC charging, communication between the EV and EVSE shall be power line communication over the control pilot line as depicted in DIN 70121.
- 4.5.2 The North American Charging Standard is compatible with “plug and charge” as defined in:ISO-15118https://tesla-cdn.thron.com/static/HXVNIC_North_American_Charging_Standard_Technical_Specification_TS-0023666_HFTPKZ.pdf?xseo=&response-content-disposition=inline%3Bfilename%3D%22North-American-Charging-Standard-Technical-Specification-TS-0023666.pdf%22
As an additional point, those two standards DID 70121 and ISO-1511 are also applicable standards for CharIN. The interconnections are therefore quite uniform and uncontroversial. Anyone who already complies with CCS in either version is already working with those standards. The crucial point for interoperability is ISDO-15118 which IS REQUIRED for any plug and charge. For several manufacturers it seems that is a difficult task, primarily because the payment component is quite explicit, and ends out eliminating the OEM apps, although those apps are themselves effectively required to replicate ISO-15118 communications, while bypassing the simpler and more elegant vehicle to charger communication , payment for which must be preauthorized through Tesla software.
The bottom line is that Tesla, in NACS used universal standard protocols that were used in houses, buildings and everywhere else, so compliance from the Supercharger to the vehicle is simple. That, however, was novel, but CharIN did the same thing, so evolving to ISO-15118.
ISO standard documents are simple to download but are quite expensive, so you really need specific technical specifications to pay the price.
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