Home/L2 charging amperage negotiation

[andisimose]

My google has failed me and I figure someone here knows.

In the energy screen you can modify your charging amperage and I understand that I would want to do that when connecting my mobile chargers to a random outlet. But do I need to worry about that setting if connect to a random tesla destination charger or a chargers hardwired at an air bnb.

my assumption is that somewhere in the j1772 standard is some limited communication that can define how many amps the chargers can provide, orelse we wouldn’t have dipswitches to define max output on the wall chargers and A lot more flipped breakers.

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[MReda]

You shouldn't have to worry about it if it's a legitimate EVSE.

 

[Electrified Outdoors]

You don't need to adjust that unless your concerned about the electrical system your connected to or in some rare case where your using an adapter (like a 14-50 to TT30).

 

[Cosmacelf]

My google has failed me and I figure someone here knows.

In the energy screen you can modify your charging amperage and I understand that I would want to do that when connecting my mobile chargers to a random outlet. But do I need to worry about that setting if connect to a random tesla destination charger or a chargers hardwired at an air bnb.

my assumption is that somewhere in the j1772 standard is some limited communication that can define how many amps the chargers can provide, orelse we wouldn’t have dipswitches to define max output on the wall chargers and A lot more flipped breakers.

Correct. When you don’t use a mobile connector and instead use a hardwired connector with its own J1772 handle, it will have been configured to know the maximum amperage it can give to the vehicle. And there is indeed a simple communications link that tells the vehicle what that maximum amperage is. It’s part of the J1772 spec. So no need to worry when using a random J1772 EVSE. Just plug it in and walk away.

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