The Tesla Roadster goes more than 200 miles (380 km) on a single charge. The average person drives about 40 miles (60km) in a day. This leaves a range of about 160 miles (257km) after an average day of driving in a Tesla Roadster. Meaning that at the end of the day when a Roadster is plugged in to be charged up, it is really only to top off the battery.
Why is this significant?
It is important to understand the amount of energy a battery draws when charging and how this affects the electricity grid.