While not German I need to highlight the fact that in Germany power generation relies much less to fossil and nuclear than in the US, roughly 1/3 less (~30% compared to ~82%, see links below)
That makes Germany a bit more advanced on the generation part but also more expensive - without going into the nuclear debate here. So it is not apples to apples comparison at the end of the day
But Germany appears to rely on Coal more than the USA for power generation.
Coal is the largest source of electricity in Germany. As of 2016, around 40% of the electricity in the country is generated from coal. Germany has been opening new coal power plants until recently, following a 2007 plan to build 26 new coal plants
Compare the energy pie chart for Germany vs USA. (Add brown coal and hard coal percentages)
I should have clarified probably that I was referring to this part of your post:
>Assuming Germany's electric infrastructure is as advanced as that in the US (I hope!), then that reduces the Tesla's cost to about 2c/mi.
Coal is the largest source of electricity in Germany. As of 2016, around 40% of the electricity in the country is generated from coal. Germany has been opening new coal power plants until recently, following a 2007 plan to build 26 new coal plants
Compare the energy pie chart for Germany vs USA. (Add brown coal and hard coal percentages)
https://en.wikipedia.org/wiki/Energy_in_Germany https://en.wikipedia.org/wiki/Energy_in_the_United_States