gzt: That's useful. Is there any safe option to gain some charge from a standard 10A socket?
Absolutely. I bought the optional cable that does exactly that. Autolink sell them for $1,000. I didn't see how I could NOT have one as having one means I can charge the car anywhere, any time a regular power outlet is available. Slower (about 2/3s the speed of 16amps?).....but it gets the job done. Here's a photo. As you can see, you can select the amp rating. I was told to use 10amps.
This cable lets me charge up - slower - from any normal power point.