3 ms·
> the adapter is only for DC fast charging, not for Tesla's AC destination chargers I wonder what actually happens if you try to use a Tesla destination to J17
by p1mrx 3y ago
> the adapter is only for DC fast charging, not for Tesla's AC destination chargers
I wonder what actually happens if you try to use a Tesla destination to J1772 adapter with a NACS DC charger? In that case, the 400-1000VDC pins are connected to the 240VAC pins on the vehicle. Is the NACS handshake smart enough to detect this fault before the power turns on?
I have one of those adapters, but I stuck a "120-240V AC ONLY" label on it because I don't want to find out.
- 0xfae 3y agoIn NACS the DC and AC pins are the same pins. The car only connects the charge port pins to either the AC/DC charger or to the DC battery after it communicates with the charger and tells the charger what voltage / amps it wants.
- p1mrx 3y agoYou are describing the behavior of a NACS vehicle. I'm wondering what happens if you connect a DC charger to the AC pins of a CCS1 vehicle, and then start the DC handshake. If the DC charger is required to passively sense the battery voltage before charging, then it's probably fine. Otherwise, magic smoke!
- theluketaylor 3y agoThe signalling won't work, so nothing will happen.
- p1mrx 3y agoHow do the endpoints know the difference between a J1772 or CCS1 adapter, if the adapters are passive? Don't they use the same signalling pins?
- anticensor 3y agoNo power is provided until negotiation using the signalling authorises the power transfer.
- p1mrx 3y agoSure, but the vehicle and charger both support DC. How do they know that the adapter in the middle does not?