NACS/J3400 change

bwilson4web

Well-Known Member
Subscriber
Learned something new today:

North American Charging System (NACS)
Developed by Tesla and initially for Tesla vehicles only. Opened up for other manufacturers to use in 2022. Now widely adopted for EV sales in the USA. The physical plug is still the same but the signalling/comms was changed from CAN bus to CCS protocol.

Tesla vehicles built prior to 2021 are incompatible with the CCS protocol and require a retrofit to become compatible with CCS. However, the Tesla Supercharger network remains backward compatible with the prior proprietary CAN bus standard (i.e. Tesla chargers can use both the CAN bus and CCS protocol depending on what vehicle is connected).

NACS can support both AC charging and DC fast charging.

Source: https://community.openstreetmap.org...rger-and-socket-tesla-destination-tags/126491

I didn't realize it was adoption of CCS protocol over CAN bus that made the change.

Bob Wilson
 
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