Older Tesla chargers did not use CCS to communicate. My 2019 Model 3 doesn't support CCS at all. When I plug into a Supercharger, it's not using CCS to communicate with the charger, it's using Tesla's proprietary CAN bus protocol. Teslas made before 2021 need an ECU retrofit to support CCS.
This is misleading and not entirely true.
Older Tesla chargers did not use CCS to communicate. My 2019 Model 3 doesn't support CCS at all. When I plug into a Supercharger, it's not using CCS to communicate with the charger, it's using Tesla's proprietary CAN bus protocol. Teslas made before 2021 need an ECU retrofit to support CCS.