Tesla is finally ready to move the needle on its most ambitious heavy-duty project. After years of development and limited pilot runs, the automaker has provided an exclusive first look inside its dedicated Semi factory in Sparks, Nevada. This massive facility is situated just down the road from Gigafactory Nevada and is being specifically engineered for high-volume mass production.
A new walkthrough from the YouTube channel Core Memory offers our first detailed glimpse into the "machine that builds the machine" for the electric Class 8 truck. Semi Program Director Dan Priestley guided the tour, highlighting how the factory was designed to produce thousands of trucks in the "minimum viable space" using hundreds of robots and a massive overhead conveyance loop.
Inside the Semi Factory
One of the most impressive technical feats in the new plant is the overhead carrier system. These carriers are among the largest of their kind in the world, capable of moving sub-assemblies weighing well over 10,000 pounds. As the truck moves through the line, the system automatically adjusts the height of the vehicle so that technicians can work at the perfect ergonomic level.
Priestley also demonstrated the "battery marriage" process, where three cube-shaped battery packs are fastened into the frame. Unlike the "pancake" style packs found in Tesla’s passenger cars, the Semi’s packs are cubic and structural, designed to retain heat better in cold weather and endure over one million miles of operation. The facility also features a massive "light tunnel" for final quality checks, which is scaled up specifically to handle the Semi's height and width.
Redesigned for Mass Production
The Semi being built in Nevada is a significant evolution from the early prototypes. The refreshed design Tesla unveiled last fall includes major engineering breakthroughs like a fully electric steering assist system and a 48-volt low-voltage architecture borrowed from the Cybertruck. The truck even uses Cybertruck-derived steering actuators and 4680 battery cells to improve manufacturing efficiency.
Tesla is also focusing on fleet versatility. The truck comes in two primary versions: a 325-mile Standard Range and a 500-mile Long Range. While both trucks look similar, the Standard Range model features a shorter wheelbase, making it lighter and more maneuverable. For operators, the Semi now includes a modified version of Powershare to power refrigerated trailers directly, eliminating the need for separate diesel-powered generators.
Scaling the Future of Freight
Tesla’s ultimate goal with this factory is to reach a production capacity of 50,000 Semi units annually. To support these ambitions, the company is building a dedicated Megacharger network capable of delivering up to 1.2 megawatts of power. These stations can recover 60% of the truck’s battery in just 30 minutes, keeping fleet turnaround times competitive with diesel.
As the factory prepares to exit its "prepping for start of production" phase and kick off mass production, the focus shifts to convincing the logistics industry. With lower maintenance costs, regenerative braking for safety on steep grades, and a center-seating cockpit with 10 exterior cameras, the Semi is positioned to be a game-changer. Priestley said in the video, which was shot last month, that the factory is “on the cusp of starting to produce first assemblies off these lines,” with Tesla planning to begin mass production in earnest later this year.
