[aerohead]

I won't attempt any particulars about the recent 'reveal', as there aren't any particulars published yet, but the rig did succeed in covering 500-miles distance on a charge, @ 81,000-pounds GVW, in California, @ 55-mph, including the Cajon Pass.
On a 'gallon-of-Diesel' basis, it's at least 350% more efficient than the 'typical' Diesel 18-wheeler on the road.
It will charge @ 1- Mega-Watt/hour.
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Some working numbers:
* Tesla Tractor- 15,700-lb
* Dry Van- 21,300-lb ( empty ), L=55-feet, W= 102-inches, H= 13'-6-inches
* 45,000- lb cargo capacity
* Projected Frontal Area- 108-sq-ft ( 10.03352871 meters-squared )
* Cd 0.36 ( has been mentioned, but is determined by the trailer ), so it remains an 'unknown quantity' )
* Coefficient of rolling resistance @ 55-mph: Cfrr- 0.008181818
* Tractor-to trailer gap: yes, unspecified distance
* Boat-tail : none
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* 'Supertruck'- Cd 0.3953
* 'Futuretruck,' Cd 0.2635
* NASA Semi-trailer, Dryden Research Center, Edwards AFB, 1980, Cd 0.238
* Walter Korff, Lockheed Aircraft Corp., Semi-trailer, 1963, Cd 0.20