The cost for electricity in California $.33 per kwh after the first 900 kwh is used in a month. Since most people will use about 900 kwh/m without an electric car, when they plug their new car into the grid they will be paying $.33 per kwh to charge their car. The Tesla would cost 65 kwh x $.33 or about $22 for a complete charge. Now, if you pump 65 kwh into your Tesla for 22 work days per month your electic bill would increase by $22 x 22 days or $484 per month.
Excellent post.