Don’t EVs offer low miles per charge ratios?

The miles per charge ratio depend on the battery and their chemistry. Most new EV cars will have at least 350 km (200 mile range) range and most will be higher. 

Since you can charge the car in your garage with a slightly modified power outlet, the car will be fully charged in the morning and the electricity cost is typically only 20% of what gasoline would cost. It has been announced that Tesla will bring out a new roadster in 2019 with a 1,000 km (620 mile) range.