Tesla Semi:
- 300 or 500 miles of range
- efficiency: < 2kWh/mile
Tesla isn't advertising the actual capacity, but given the above advertised values, we can assume 600kWh and
1000kWh as maximum values for the two versions of the truck. I would expect actual capacity to be less, given how good Tesla is at making their vehicles efficient.
Transport trucks are all about aerodynamics and the trailer and load figure prominently into that. Don't believe me ? Put a small trailer behind your S/3/X/Y and report back with your Wh/mile figure.
600 KWh/mile x 60 MPH = 46 KW motor power at steady state. Yeah, no, that ain't happening.
1000 KWh/mile x 60 MPH = 60 KW motor power at steady state. That isn't happening either.
Conventional highway tractors need at least 150 HP to pull a trailer at 60 MPH. Tesla might be able to get that down some, but that is a low number. I'm thinking an average highway truck needs 200 HP to pull the load, steady state, 150 KW. 150 KW/ 60 MPH = 2.5 KWHr/mile.
400 miles x 2.5 KWHr/mile = 1 MW of batteries on board. 1 MW / 200 watthours/Kg = 5,000 Kg of batteries, which is doable if the rest of the truck is kept really light. A typical diesel road tractor weighs about 20,000 pounds.
That is my guess and I'm sticking to it.