Just picked up my P85 yesterday. Characteristic of me, I procrastinated and still haven't finished my 240V 50amp NEMA 14-50 yet (it's almost done, just a long 100ft run and I need to shift some breakers down to make room for the new double pole breaker.) Garage and outlet is finished. Just need to finish wiring the breaker. I'll actually finish this later today after work. That being said, in the mean time my garage has a regular 15 amp outlet. When I plugged in the UMC directly to the outlet, I get an error that pops up that said 'Weak power or extension cord used'. It does not charge the car. Shows 0/12a being used. (well, first it goes up to 12/12a, but then I hear a click and it goes down to 0/12a). Clearly I am not using an extension cord. I don't know what else is on that circuit. I don't know if power is being used by something else on that circuit, or if its just a very long run from the breaker to that outlet and the voltage drop is too high. I did figure out that I could 'turn down' the amps to use on the touch panel, and when I drop it to 9a (so it displays 9/9a), that it seems to charge at 1mile/hour, but that warning about weak power or extension cord is still displayed. This does bring about a good point that I didn't really think about though - you can't really just "plug into any outlet" and expect to pull 12a and get 3/4mph charge. None of this really matters to me much, just a bit surprised. Once I'm done with my NEMA 14-50 then all should be good.