this post was submitted on 20 Aug 2023
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[Dormant] Electric Vehicles

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The Switch From CCS1 To Tesla's NACS Connector Is Expected To Kill The J1772 AC Plug (insideevs.com)
submitted 1 year ago by [email protected] to c/[email protected]
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I was wondering with all the talk of NACS, what would happen to J1772. I think I found the answer, unless folks here see it differently. Thanks!

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[–] [email protected] 2 points 1 year ago (1 children)

IIRC, Tesla claims their connector is rated for 1kV as well, and at a slightly higher total power rating than NACS. They haven't actually fielded chargers above 400V, though. It seems though that the general consensus is that the NACS connector is actually more or equally capable overall compared to the CCS (J1772) connector, in a smaller form-factor. At first I thought it was a pretty odd switch, but now that it's an open standard managed by SAE and the specs seem to be at worst comparable... it's not exactly a bad idea for the OEMs to use it.

[–] [email protected] 1 points 1 year ago

Actually, it’s not just another plug. The fact that the same Pins are used for AC and DC charging adds a little bit more complexity to the car. Either you need additional switches in the car to separate the Onboard AC-Charger from the charging port, or the AC-Charger must be designed to withstand an DC input on its AC-Input contacts. That probably won’t be the biggest problem when the DC-voltage is just around 400V, as the AC-voltage is not that far away.

But if you switch to 800V Batteries (which most of the industry is doing), that probably could get more challenging, as the AC-charging-voltage won’t change.

We‘ll see what the car industries solution will be.