Please keep in mind, I'm not a Tesla owner. As I understand it, on Teslas built before October 2020 the charging ECU (electronic control unit) is not compatible with the CCS protocol. Apparently, a replacement unit is required. I suspect this is something you could easily verify with Tesla if you wanted to, but your 2021 should be fine. As you suspected the system is backwards compatible, newer Tesla can use both protocols, but the older ones can't do CCS without the upgrade. This is the same limitation that impacts the adapters to allow Teslas to charge from CCS stations.
As for the 2020 Bolt, some 2019-2020 Bolts require a software update, outlined in service bulletin #24-NA-200. I have a 2020 too and I just called the dealer and asked if a software update was shown for my VIN. They said there is none shown. That and the lack of an email from GM leaves me fairly comfortable with trying an adapter. I don't have one yet, I ordered the GM one and it is on backorder. The adapters only work on V3 and V4 SuperChargers (most V4s are MagicDock equipped so no adapter is actually needed). PlugShare does show the ones where adapters work versus the older ones that are Tesla only. The Tesla app also only shows adapter friendly ones. Folks that have been charging using the adapters are reporting the Tesla app is more reliable than using the Chevy app. Mike Chancey -----Original Message----- From: markehans...@gmail.com <markehans...@gmail.com> Sent: Wednesday, September 25, 2024 7:27 PM To: evtinke...@gmail.com; 'Electric Vehicle Discussion List' <ev@lists.evdl.org> Subject: CCS to J3400(NACS) Tesla adapters communication protocol Thanks EVtinker, I have a 2021 Tesla-Y, is that considered "old" or "new"-CCS? When was the transition; it should be backwards compatible (like most things that are engineered properly - think B&W TV's to Color TV's etc.) Since I have a 2020 Chevy Bolt, how would I know what Tesla superchargers I could use with an adapter? Have a renewable energy day, Mark Mark E. Hanson 184 Vista Lane Fincastle, VA 24090 540-473-1248 phone & FAX, 540-816-0812 cell REEVA: community service RE & EV project club Website: www.REEVAdiy.org (See Project Gallery) UL Certified PV Installer My RE&EV Circuits: www.EVDL.org/lib/mh REEVA Demo: http://youtu.be/4kqWn2H-rA0 Fincastle Solar Weather Station -----Original Message----- From: evtinke...@gmail.com Sent: Wednesday, September 25, 2024 4:38 PM To: 'Electric Vehicle Discussion List' <ev@lists.evdl.org> Cc: 'Mark Hanson' <markehans...@gmail.com> Subject: RE: [EVDL] Ccs to J3400(Nacs) Tesla adapters communication protocol Tesla switched to the CCS communication protocol due to European requirements. Newer Teslas sold in the US speak CCS but use the NACS connector. Older Teslas need a hardware upgrade to use newer Tesla superchargers. CCS cars, even with an adapter, cannot use older Tesla superchargers as those don't use CCS protocols. -----Original Message----- From: EV <ev-boun...@lists.evdl.org> On Behalf Of Mark Hanson via EV Sent: Wednesday, September 25, 2024 3:29 PM To: Electric List <ev@lists.evdl.org> Cc: Mark Hanson <markehans...@gmail.com> Subject: [EVDL] Ccs to J3400(Nacs) Tesla adapters communication protocol Hi Folks Isn’t a Tesla communication protocol adapter needed to operate your non-Tesla EV (like my Bolt) with the HVDC CCS to J3400(Nacs) physical adapter ? I don’t see how the adapter would work without a GM agreement with Tesla to translate the data to GMs CCS fast charging protocol. Similarly I bought a few years ago a ChadeMo adapter ($400 from Tesla) that never worked well due to the incompatible data transfer to Electrify America fast chargers. The few times I tried it, I had to call Electrify America 800 number and have the technician remotely close the HV charge contactor to initiate charging. Best regards Mark Sent from my iPhone _______________________________________________ Address messages to ev@lists.evdl.org No other addresses in TO and CC fields HELP: http://www.evdl.org/help/ _______________________________________________ Address messages to ev@lists.evdl.org No other addresses in TO and CC fields HELP: http://www.evdl.org/help/
