Edit : by the "owner" at the title of the thread I meant loaner... (mod note: I fixed the typo - Bonnie) Hey there, Got my Model S in August 31st 2013, P16658. I live in an apartment buildin, and the wire is quite long to the breaker. . Theorically on my 208 V plug, i Could get 24 Amps (30 amps circuit). However I never got that high because everytime I got 24 Amps, the Voltage would get to 195-196V, which is a drop too high according to the Code. Instead I was charging ad 18 Amps and the V reading was about 200 ish. I once tried to charge at 24 amps and after a while the car lowered it to 18 amps with a warning message (Bad wiring or extension cord used). So two days ago, I got a loaner S85 kWh with about 6000 km on it, P36xxx When i tried to charge it at night, it was to 24 amps. Surprise! All the time it was charging I was getting 198-200 V and was able to complete the charge (few hours) at 24 Amps. That is using the same UMC. Now I have back my Model S (24 000 km) since yesterday. I tried charging it ad 24 amps, and the Volts drop to 196 ish again. I cleanned the charge port with a cotton swab, but that did not improve things. Also apparently they uploaded the latest firmware version So my question is, Did I have luck two days ago with the tension coming to my appartment building up to my outless, or is it possble that my battery have some sort of higher resistance ? (both had the dual chargers, if that change anything) Sorry for my English, and thanks for your help.