I traded in my 2012 LEAF for a 2013, one of the reasons was to get the 6.6 KW charger. I have a GE Wattstation and a EVSE upgrade "brick". I kept the 2012 EVSE and traded in the car with the 2013 EVSE left in the old car. So, for a test I measured the grid power that the new LEAF drew from the line with the various EVSE's. First, with the Wattstation, power input was 6,580 watts which is pretty close to 6.6 KW. I don't think the Wattstation would draw more then 100 watts to operate the contactor and electronics therefore, the charger in the car is seeing close to its rated output. The EVSE upgrade "brick" charged at 3,670 watts on the 240 volt line drawing 15 amps. One the 120 volt line, it charged at 2,124 watts a little over 17 amps. This is Phil's upgrade with the higher power option which makes the upgraded "brick" viable even for new cars with the larger charger. BTW very happy I swapped the leases as there are several changes I really like on the '13.