Tesla’s latest regulatory filings have put firm numbers on the production Semi, giving the clearest public look yet at the truck’s battery sizes, motor output, weight, range, charging system, and auxiliary hardware.
The key disclosure came through a California Air Resources Board executive order signed in April 2026, which listed the production battery capacities for both trims.
For a long time, outside estimates assumed Tesla would need far larger packs to hit its advertised range targets. But the final numbers came in lower than many expected, and reporting on the filing said the production truck trimmed nearly 1,000 pounds from early prototype weight. That is a big part of the story, since battery weight has always been one of the main pressure points for electric heavy trucks trying to preserve payload.
Long Range trim
The Long Range Tesla Semi carries an 822 kWh usable battery pack built with NMCA 4680 cells. It uses a tri-motor rear axle setup, and peak motor output is listed at 800 kW, or 1,072 horsepower.
Tesla and trade reports say the Long Range version has an unladen curb weight of about 23,000 pounds. Then, at the standard 82,000-pound gross combination weight used in Tesla’s published claims, the truck is rated for 500 miles of range.
That pairing of range and battery size is likely to draw close attention from fleet operators, since it gives them a better sense of route planning and energy use than the earlier broad claims did.
Standard Range trim
The Standard Range version uses a 548 kWh battery pack, and it uses the same NMCA 4680 cell chemistry as the larger model. Its peak motor output is listed at 525 kW, which works out to 704 horsepower.
Tesla’s published data put this version under 20,000 pounds curb weight, giving it a lighter base for regional work. And at the same 82,000-pound gross combination weight, the Standard Range model is rated for 325 miles per charge. That pushes past the 300-mile figure tied to the Semi’s earlier rollout.
Charging, efficiency, and fleet use
Both Semi variants are built to use Tesla’s megawatt-class charging setup, with support for the Megawatt Charging System and peak charging up to 1.2 MW. Trade reports said the trucks can recover up to 60 percent of pack capacity in about 30 minutes.
The filings and product details add a few other fleet-relevant data points. The trucks are listed at about 1.7 kWh per mile in energy use, they run a 48-volt low-voltage architecture, and they include electric Power Take-Off capability up to 25 kW for trailer and auxiliary functions. So the latest record does more than settle a battery-size debate. It gives carriers a firmer base for judging payload tradeoffs, charging stops, and route economics as Tesla moves the Semi from a limited early phase into wider commercial service.
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