I found the same thing. I wondered why the L1 Kia EVSE took longer than the displayed charge time before charging. I measured the actual current and discovered that the car charges at a bit lower rate than what the EVSE tells it it can have.
Here is what I found (using a clamp meter):
Kia supplied EVSE for US market on 120VAC, supposed to be 12A charges at 11.0A
Panasonic (Nissan) EVSE on 120VAC, 12A=>10.4A, 16A=>14.3A, 20A=>18.4A
Panasonic (Nissan) EVSE on 240VAC, 20A=>18.4A
Since the 20A charge rate on both 120V and 240V was 18.4A that if I tested the lower charging rates on 240V they would be the same as those on 120V.
This is frustrating to me. Why did they have to derate the onboard charger rather than just the supplied EVSE? At least the portable Panasonic EVSE I have is programmable but I shouldn't have to program it to 14A just to get the car to charge at 12A! Kia could have easily put a switch on their supplied EVSE for a high rate or low rate so if the charging kept tripping the breaker or blowing a fuse then the owner could switch it to the low rate and slow the charge rate by a couple of amps.
I'm going to add this to my list of things Kia needs to address. I just need to find who to send it to who will listen.
