Color me skeptical. Here are some VERY rough numbers; please feel free to correct any errors of bad assumptions.
I am comparing the weight of energy for a Cessna Grand Caravan and the electric plane, simply because they are about the same size and carry approximately the same number of passengers.
1) The energy density of kerosene is 39.5 kw-hr/gallon
2) The Caravan consumes in the range of 75 gallons (550#)/hour in cruise. For a 540 mile trip this is approximately 1650# or 8850 kw-hr of energy.
3) The energy density of a Lithium battery is maximally about 250 wh/kg, so let's give the electric a generous 400 wh/kg.
4) Let's give the electric machine another boost and call the efficiency of the turbo-prop 30% and the electric 100%.
5) With these assumption the electric will need 2655 kw-hr of stored energy and will arrive with a flat battery and no reserve.
6) At 0.4 kw-hr/kg the battery will weigh 6600 kg.
Doesn't look doable to me
Last edited by Winemaker; 22nd Jun 2019 at 23:42.