I am starting to plan for our Model X and as part of this, we installed solar at the house. We over-sized the installation to allow for the extra draw of the Tesla. We collected about 10 month's worth of usage numbers which is giving us a better idea of the actual overage we have. (we are still in the + after the summer months and didn't start until Feb) Now my question is: How much will it actually take to keep the Tesla charged? First a few assumptions: Average number of miles per year of 12,000 Location: Detached garage in Scottsdale 85kWh Battery (we'll have to see what will be available) The reason I posted this question here is because of the unique heat issues while charging the car in the middle of a hot garage in the summer. I am hoping someone installed a usage meter on their charger in the Phoenix area to get a better idea of the usage. My assumption is that numbers from other areas really don't give the right picture of charging in the heat. Did anyone install additional cooling / ventilation in their garage? Thank you in advance for any information.