The average “station dwell time” at a gas station is 12 minutes, from pulling in to leaving, plus 8 minutes of “off route time” getting to and from the gas station. Depending on the car that might give you 300 miles range. 20 minutes per 300 miles works out to 6.7 minutes per 100 miles traveled.
A Gravity leaving the house fully charged would need no charging stops for the first ~400 miles. If after that we assume the same 8 minutes getting to a charger, 2 minutes wasted at the charger plugging in, etc, and then 19 minutes to charge 300 miles on a 400 kW charger you get 9.7 minutes per 100 miles thereafter.
So on a 1000 mile road trip the gas car would spend 67 minutes fueling, while the Gravity would spend 58 minutes charging. Which means that with destination charging and well placed chargers you’d actually spend less time stopped in the Gravity than the typical gas car, and the advantage should increase as trips get shorter.
Wow. I hadn’t expected that.
