I used my 120v EVSE this afternoon and it was warm after a couple of hours charging. Looking at the cord and the the control box (EVSE) I would guess they are designed for 20 amps at 120 volts, is 2.4Kw. My EV Link puts out 30 amps at 240volts which is 7.2Kw I won't be messing with that 120v EVSE but I will get or make up a 30ft 10ga extension cord for it. I also have figured out a way to make the EV Link portable so I can take it with me on a long trip. I will have a 30A 240v plug on it.