Very nice work! Might look a lot closer at this once I have access to my '15 SV (hoping for delivery this week).
With your system would it be possible to add smarts for when to kick-off the charge?
I'd like a system that allows me to keep the car plugged in at home but only kick off charging once I hit 30% SoC and then only charge to 70%. That way I could always leave the car plugged in and know that I have enough range for the next day.