You will have some great numbers with AZ sun and 11.7 kw. good to see you getting some miles on that Volt.
We are @17,403 EV miles 200 mpg this has saved buying 805 gallons of gas. It is so much fun driving a sun powered car.
You should check out the post on building a 240V car charger.
http://ecorenovator.org/forum/applia...ment-evse.html
I have been using the one I built for almost a week now.