Thanks to Chris for letting me charge up on the way to the very northern tip to New Jersey today.
Voltage at Chris' measured about 122 in the morning and 117 on the way home after dark. No trouble charging either time. Of course, the car would see about twice those numbers, or 244 to 234 volts. Well within ANSI specs. Unlike at my house which is often 253 volts and the Mini E won't fast charge.
By the way, the skiing was lousy, too many bare spots from all the wind.