Tesla has unveiled a sneak peek inside its highly anticipated Semi factory in Sparks, Nevada, located on Electric Avenue. This facility marks the final stage of a journey that began with Elon Musk’s Master Plan Part Deux in 2016.
In March 2026, journalist Ashlee Vance and the Core Memory crew were granted exclusive access to the factory, guided by Dan Priestley, the head of Tesla’s Semi program. The tour showcased a facility in its final phase of preparation for mass production. The team spent a year erecting steel and running utilities before bringing in heavy equipment for production.
The factory boasts a highly vertical manufacturing layout to maximize efficiency, featuring massive overhead carriers that move sub-assemblies through the air. This innovative system allows heavy components weighing over 10,000 lbs to be lowered to the perfect height for operators at various stations.
A key highlight of the production line is the “battery marriage” station. Unlike Tesla’s passenger cars with flat “pancake” battery packs, the Semi utilizes three cube-shaped packs that fit snugly into the frame. These packs, which use the same cells as the Cybertruck, offer substantial energy storage in a compact design.
The Semi is available in two configurations:
– Standard Range: Approximately 325 miles on a full charge.
– Long Range: Approximately 500 miles on a full charge.
Despite its size, the Semi drives with the precision of a passenger car, delivering effortless torque even when hauling a 40,000 lb payload. The regenerative braking system eliminates traditional risks associated with gear-shifting or brake failure on steep grades.
Operating at a significantly lower dollar-per-mile cost than diesel, the Semi aims to disrupt an industry where trucks consume a substantial amount of fuel. With reduced maintenance and higher reliability, Tesla believes fleet operators will be convinced of the vehicle’s efficiency after testing it in their operations.
Each Semi purchase includes access to a dedicated supercharging network being developed specifically for these heavy-duty haulers.
The factory also features a massive “light tunnel” for final quality checks, with Vance jokingly suggesting employees might want to get married there. This facility represents the culmination of nearly a decade of development for Tesla, turning the ambitious 2017 prototype into a mass-manufactured reality.
To get a closer look at the Tesla Semi factory, check out the video below: