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Tesla has quietly updated its official Semi website with final specifications for the production version of its all-electric Class 8 truck, confirming two trim levels — Standard Range and Long Range — as customer deliveries approach.
The spec update comes after Tesla unveiled the redesigned Semi at last year’s shareholder meeting with a new chassis, updated headlights, and improved aerodynamics. Production was pushed into 2026 as the company continued installing equipment at its Nevada factory, which Tesla said in April was on track for volume production in H1 2026.
Tesla Semi specs revealed
According to the updated Tesla Semi website, here’s what the production truck will offer:
Standard Range:
- 325 miles of range at full 82,000 lb gross combination weight
- Curb weight under 20,000 lbs
- 1.7 kWh/mile energy consumption
- Three independent motors on rear axles
- 800 kW of drive power
- MCS 3.2 charging support
- 60% charge in 30 minutes
- Electric Power Take Off (ePTO) up to 25 kW
Long Range:
- 500 miles of range
- Curb weight of 23,000 lbs
- 1.7 kWh/mile energy consumption
- Three independent motors on rear axles
- 800 kW of drive power
- 1.2 MW peak charging speed
- MCS 3.2 charging support
- 60% charge in 30 minutes
- Electric Power Take Off (ePTO) up to 25 kW
Tesla notes that both variants are “designed for autonomy,” signaling the company’s intent to eventually deploy the Semi in its autonomous freight network – something it has previously stayed away from mentioning about its semi truck.
The 1.7 kWh/mile efficiency figure is consistent with what Elon Musk confirmed back in 2022, which implied a roughly 900 kWh battery pack for the 500-mile version.
The 1.2 MW peak charging speed on the Long Range model matches what Tesla demonstrated in a video late last year, megawatt-class charging that can add hundreds of miles of range during a driver’s mandatory 30-minute break.
For reference, when Tesla first unveiled the Semi back in 2017, the company promised 300-mile and 500-mile range options at $150,000 and $180,000 respectively. The new Standard Range trim at 325 miles suggests Tesla has slightly exceeded the original base spec, though pricing has not been updated.
We previously reported that a Tesla Semi customer said the price had a “dramatic increase.”
Electrek’s Take
These specs confirm what we’ve been expecting since Tesla unveiled the redesigned Semi at last year’s shareholder meeting. The 325-mile Standard Range variant at under 20,000 lbs curb weight is the more interesting option for most fleets, it maximizes payload capacity while still offering enough range for regional hauls and hub-to-hub operations.
The 500-mile Long Range with its 23,000 lb curb weight sacrifices about 3,000 lbs of payload for the extra range, but it still opens up the possibility of all-electric long haul trucking for lighter loads.
The efficiency figure of 1.7 kWh/mile is impressive and consistent across both trims. For context, that translates to roughly $0.17/mile at average commercial electricity rates — compared to about $0.50-0.70/mile for diesel. Over a million miles of typical semi truck operation, we’re talking hundreds of thousands of dollars in fuel savings.
With volume production confirmed for this year and these final specs now public, Tesla appears ready to start disrupting the $700 billion trucking industry. The question now remains the price.
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