Tesla Semi Factory Opens in Nevada: Diesel Math, Orders and a 2027 Delivery Call
Diesel hit a record $6.529 a gallon this week, which cuts the payback on a $290,000 Tesla Semi to under two years on the desk's arithmetic. Tesla opens a factory built for 50,000 trucks a year with about 3,400 units of disclosed orders. The desk expects fewer than 10,000 Semi deliveries in 2027.
The Energy Information Administration's weekly survey put on-highway diesel at $6.529 a gallon on September 21, the highest in the series' history and $2.78 above a year earlier. Three weeks ago it was $5.60. Tesla could not have picked a better week to hold the formal launch of its Semi at a new 1.7 million square foot plant in Sparks, Nevada, next to its battery gigafactory. The plant is designed for up to 50,000 trucks a year. The first high-volume unit came off the line on April 29.
Fuel prices have made the demand case. The supply case is weaker. At today's diesel price the Semi's running-cost advantage is large enough to sell itself to any fleet that can charge it. Tesla's own battery allocation, a public charging network with a handful of live sites and an order book that fills well under a tenth of the plant will limit how many trucks reach customers. The desk expects Tesla to deliver fewer than 10,000 Semis in 2027.
Tesla's truck customers have long memories, and the history explains why. At the unveiling in November 2017, Elon Musk promised production in 2019 and prices of $150,000 for a 300-mile version and $180,000 for 500 miles, with a $200,000 Founders Series. PepsiCo ordered 100. Production did not begin until October 2022, and PepsiCo took the first trucks on December 1 that year. Tesla said the delay came from battery supply, which it steered to passenger cars. The volume date then slid again; Reuters noted that Tesla's July shareholder letter put volume production in 2026. The price moved too. Electrek reported in February that Tesla was quoting $290,000 for the 500-mile Long Range and $260,000 for the 325-mile Standard Range, about 60% more than the 2017 list.
The engineering claims have held up better than the schedule. In the North American Council for Freight Efficiency's Run on Less depot trial in September 2023, PepsiCo reported its Semis used about 1.7 kilowatt-hours a mile, and one truck covered 1,600 miles in under 48 hours with charging stops. Tesla promised less than two in 2017.
At this week's prices, assume a diesel tractor returns 8 miles a gallon, the figure Electrek used in a May cost study and a generous one for diesel. At $6.529, fuel costs about 82 cents a mile. The Semi at 1.7 kWh a mile, charged at the EIA's July average commercial rate of 14.53 cents per kWh, costs about 25 cents a mile in electricity. Add the maintenance gap in the same study (18 cents a mile for diesel, 6 cents for the Semi) and the electric truck saves about 69 cents a mile. A long-haul tractor running 100,000 miles a year saves about $69,000. Against a $165,000 diesel tractor, the $125,000 premium on a Long Range Semi pays back in about 22 months.
Run the same numbers at last September's diesel price of about $3.75 and the saving falls to about 34 cents a mile, or $34,000 a year, and payback stretches past three and a half years. The electricity price matters as much. Tesla's depot chargers are cheap to run. Public megawatt charging carries demand charges and margin, and Electrek's model puts the break-even for five-year ownership at about 30 cents a kWh. A fleet buying trucks for seven years will not price its decision off a three-week diesel spike.
The order book is real but small against the plant. A purchasing alliance called ZET SCALE, set up by Catalyst Mobility (formerly CALSTART) and the Smart Freight Centre with Microsoft and PepsiCo among the founding members, named Tesla primary supplier for up to 2,500 battery-electric Class 8 trucks. First deliveries are due in the fourth quarter and the whole order within 18 months. Kenworth, Volvo and RIDE are secondary suppliers, so not every one of those trucks is guaranteed to be a Tesla. The alliance says the order alone would nearly double the U.S. fleet of electric Class 8 trucks. Einride said in August it would add 500 Semis over 24 months, valued at about $125 million, which works out to $250,000 a truck. WattEV ordered 370 for port drayage in May, and IMC Logistics 50. The disclosed total is about 3,420 trucks, delivered over roughly two years.
Set that against the market. ACT Research expected about 213,000 U.S. Class 8 retail sales in 2025, a freight-recession year. At full output Sparks would supply about 23% of that. At $270,000 a truck, a midpoint of the two list prices, 50,000 trucks would be about $13.5 billion of revenue a year. Tesla booked about $28 billion in the second quarter alone. In 2027, 10,000 trucks would bring in about $2.7 billion.
Charging sets the ceiling in practice. Tesla's map lists 66 planned Megacharger locations in 15 states, many at Pilot truck stops along I-5 and I-10. Tesla Semi fan site TeslaSemi.com counted three operating public sites in Southern California as of August. Tesla sells depot kits starting at $188,000 for two Megacharger posts, before installation. A 500-mile truck works for regional and depot-to-depot runs today. Coast-to-coast work waits on the network.
Tesla bulls will point out that the company has solved harder ramps. Model 3 went from a trickle in 2017 to hundreds of thousands a year, and at a 22-month payback shippers will take every truck Tesla builds. The ramp speed is the problem. Tesla told investors in July that battery availability and electronic components are its main production constraints, and the Semi competes for 4680 cells with the Cybercab, which entered production in Texas in the same quarter. Every Semi pack of 548 to 822 kWh holds as much battery as several long-range passenger cars. Tesla will keep allocating cells to whichever product earns more per kWh, and in 2017-2022 that was never the truck. Tesla does not report Semi numbers separately; its "other models" line, which also includes Model S, Model X and Cybertruck, produced 8,822 vehicles in the second quarter.
Competition is thinner in America than in China. Volvo has more than 750 VNR Electric trucks in North America with up to 275 miles of range, and Freightliner's eCascadia reaches about 230 miles. Nikola filed for bankruptcy in February 2025. In China, battery-electric trucks took 20.5% of heavy-truck sales in 2025 and outsold diesel in December, and BYD and CATL-supplied makers dominate global electric truck volumes.
Winners are the shippers with depot charging and fixed routes, starting with PepsiCo, Einride's customers including Amazon, and Pilot as host of the Megacharger sites. Diesel engine suppliers such as Cummins lose share at the margin. Daimler Truck, Volvo and Paccar have to decide whether to cut prices on electric trucks with half the Semi's range. Truckers on spot freight gain nothing: they cannot install chargers and they pay the record diesel price.
The desk expects Tesla to deliver fewer than 10,000 Semis in calendar 2027, under 20% of Sparks' nameplate, against analyst estimates of 5,000 to 15,000 for 2026 alone. The first checkpoint is Tesla's third-quarter delivery report in early October and the earnings letter that follows, which will show whether Tesla starts breaking out Semi volumes. The second is ZET SCALE's first deliveries, due by December 31. The third is the Megacharger count: more than 20 public sites open by mid-2027 would mean charging no longer caps the ramp. Any quarter above 2,500 Semi deliveries before the end of 2027 would break the call.