N952JL said:
Build in charger should be 6.6, the smart extension cord (current EVSE) could come in three.
You mean 3 kW at 120v?? I don't think so. That would be 25 amps even before accounting for charger losses and required downrating. How many 40A 120v outlets have you seen? Answer: None. The closest you are likely find is TT-30 outlets at an RV park. (They look like
this.) Downrating for continuous duty means you can't pull any more than 24 amps from those. Allowing for charger losses, you would end up with about 2.2 - 2.3 kW.
With an "ordinary" electrical plug the most you can legally pull is 12A x 120v = 1.44 kW, which is what the LEAF charger currently supports. (About 1.0 - 1.1 kW make it into the battery compared to 3.3 kW at 240v.) The special 20A plug with a rotated pin could be used, and would plug into a household outlet with a "T" slot. See
this, for example. That could legally pull 16A x 120v = 1.92 kW, which might translate to as much as 1.5 kW going into the battery if the charger was upgraded to support that.
Ray