The two assumptions used in
The two assumptions used in the article to justify the operations cost, not considering the initial markup and additional wait times too charge the massive battery.
First, the assumption of 7c per kWh. The average cost of electricity on premise is about 13-15c and the supercharging will cost about 35c to 53c. So, relying on supercharged while driving on the highways, the cost is diesel, no staggering economics there.
The second assumption is that the semi can cover 1 miles with 2kwh. I don't know how the mileage was calculated, but going by experience with car, the efficiency on highways is less than 70%, even when you are sticking to the speed limits. Lesser if you go 10% over the speed limit.