I live in NYC and my parking garage kindly installed a 120 volt outlet for me. (I mainly use the car on the weekends so that's sufficient for me.) I've had a lot of problems charging here, as I outlined in another thread. Briefly, while the car begins charging at 12/12 amps, within a couple hours it usually lowers its charging rate to 5/5 amps, or more recently, just fails to charge altogether. (In case it matters, I'm monitoring the charge rates via the iphone App, since it's a parking garage and I live a few blocks away.) I spoke to my local Tesla service center tonight, and the person I spoke to suggested that was probably a problem with the 120 outlet, and not the charging cable or car itself. He didn't say for certain but that was his guess. He's going to look at the logs. If that didn't show anything, they'd come get the car and test it. (His proposed way to test it was to pick the car up, and either test it by plugging it in at a 120volt outlet at the service station, or at his home, and then see how it charged. Which I thought was crazy, that that's the most sophisticated way to test the thing. I could do that myself for chrissake.) So my question is: given everyone's experience, how likely is it that it's a problem with the 120 volt outlet / power supply itself, as opposed to the charging cable or car itself? By way of explanation, if it IS a problem with the power supply the 120 volt outlet, it's going to create a lot of headaches for me, in that I then have to ask the parking garage to... I don't even know what. Install another one? What would I even do?