http://www.eia.gov/tools/faqs/faq.cfm?id=667&t=2 http://www.eia.gov/tools/faqs/faq.cfm?id=667&t=2 Based on the figure of 9 Kwh to charge the Tesla, this is les

http://www.eia.gov/tools/faqs/faq.cfm?id=667&t=2 http://www.eia.gov/tools/faqs/faq.cfm?id=667&t=2 Based on the figure of 9 Kwh to charge the Tesla, this is less than 1 gallon of gas. Pretty efficient.