3 ms·

Probably more like 300Wh/mile. A Tesla Model 3 gets 4miles per kWh and that’s measured at higher average speed. At 3.3miles per kWh and 1.3kW for a typical L1 c

Probably more like 300Wh/mile. A Tesla Model 3 gets 4miles per kWh and that’s measured at higher average speed. At 3.3miles per kWh and 1.3kW for a typical L1 charger (literally just any standard 120V outlet), the average 45 mile range (13.5kW) would be charged in just 10 hours. With probably 14-16 hours charging each night, that's plenty to replenish greater than average usage as well. Put a 300 mile range battery in there, and you only need to charge once a week. (And note that the old Grumman LLV only had like 13.3 gallons and atrocious 10mpg, so that'd be like double the range and less frequent fuelings/chargings.)

jerf 6y ago
"A Tesla Model 3 gets 4miles per kWh" At cruising speed, I assume? Delivery is going to be radically worse, because it has a ton of start and stop operation, the worst case for consumption. You also seem to be spec'ing what it looks like for a post office to recharge one vehicle. What about dozens, plural? A current post office needs only marginally greater power than a residence. Charging dozens of electric vehicles is going to need more than that.
- antattack 6y ago
  10 vehicles, charged for 8 hours would draw 234Amps of current. About as much as single residential drop. Some houses even have 400Amp panels. Given that USPS fleet would be upgraded over number of years - power delivery is really not a problem.