The highest driving range for the longest range Tesla is 402 miles on a full charged 100kWh battery pack. This is 4.02 miles per kWh. A 30kW generator

The highest driving range for the longest range Tesla is 402 miles on a full charged 100kWh battery pack. This is 4.02 miles per kWh. A 30kW generator will produce 30kWh in an hour, which is enough energy to drive 120 miles and well above any average travel speed required. In ideal conditions a 20kW generator would be enough to drive with a completely depleted battery at highway speeds, and a 10kW generator would be enough to significantly extend your range. Which might be necessary.. a 30kW generator running at fult tilt while sitting at a stop light might be a rather unusual experience. Also looking at commercial extended duty 30kW generators makes me wonder where you're going to put that on an already 4,000lb car.