Tesla Semi In Numbers

Last update 12/6/2022

Below is a collection of numbers describing the Tesla Semi. I am using these numbers for various napkin calculations and physics examples. The confidence in these numbers various greatly. They will get refined in the near future.

H = measured, or stated by Tesla
M = Guestimate, plausible
L = Estimate, likely inaccurate

82,000 lbs
HGross Combination Weight
EV Trucks get an extra 2000lbs
28,000 lbsMWeight of Truck (with minimal interior, no sleeper)
11 jersey barriers at 4,000 lbs each: 44,000 lbs. 53 ft flatbed 10,000 lbs. 82,000 lbs total, so tractor is 27,000 lbs. This is conservative.
A diesel tractor is 10,000 up to 25,000. Note that just the diesel fuel in two tanks can be 2,000lbs.
44,000 lbsMMax Cargo Capacity
44,000 lbs Flatbed
40,000 lbs Enclosed Dry Van
13,000 lbsMBattery Weight
11,000 lbs -13,000 lb. Based on Models S battery pack weight, and 1000lbs battery. This is conservative.
500 milesHMax Range
Real world, fully loaded (81,000 lbs) at 55mph. From Launch Event and video. Total elevation on that trip was ~16k ft.
A 300 miles version was also announced.
1000kWhMBattery capacity
Round number. Stated 1.7kWh/mile efficiency and 500 miles range would suggest 850kWh. The 500 mile test runs suggests 914kWh (93% used). This is conservative and leaves reserve capacity for degradation.
1000VHBatter Rated Voltage
EPC (Tesla parts catalog) through @greentheonly
Three modular packs, that can be disconnected (for lower range?)
70% in 30minHH
Charging speed
Battery size and charging curve is unknown.
With a 1000kWh battery, this is 700kWh, and requires 1.4MW average power.
1.5MWMCharging speed
This is conservative and likely higher.
0-60mph in 20sHAcceleration fully loaded
Speed limitHMaintains speed limit even up steep grades.
26kWhMEnergy required per 1000ft of elevation. 95% energy efficiency
2.5kWhMNet energy cost per 1000ft after climbing and regen. 95% efficiency
3 motorsHPowertrain
The efficiency drive unit is for maintaining speed on highways at the second axle. It is running at optimal efficiency.
Two drive units for acceleration/regen at the rear axle.
Each drive unit is “the size of a football” and equivalent to a semi diesel engine and have “mega cooling” modules
Axles are called Torque and Efficiency
1000 hp
746 kW
Same motors as a Plaid, so using approximately Plaid S numbers.
But we don’t know at what speed. There are no EPA ratings for trucks.
Elon Tweet. “clear path to 1.6kWh/mile, possibly 1.5”
85kWMPower required cruising flat
Based on 1.7kWh/mile at 50mph.
97% one way
95% round trip
MEfficiency for ascending and regen from slowing descending. The 500 mile run showed very little impact from the grapevine (or other hills). Grapevine is 4136ft/1264m, total elevation was about ~16k ft/4900m
1.5kWhMNet consumption of climbing and descending 1000ft of elevation.
The difference between what’s needed to climb, and what gets generated through regen for a fully loaded truck.
2017 was $150k for 300 mile range and $180k for 500 mile range. Founders Series was $200k. Tesla is not taking new reservations, and likely all other ones are being negotiated case by case.
Assumptions for modeling a Tesla Semi Truck