Tesla Semi lists 822 kWh long range

Tesla Semi news is finally getting concrete again. Not hype, not a prototype sighting — actual product-page details. Tesla’s Semi site now shows two trims, Sta(tesla.com)es start in 2026, and pins the truck’s efficiency at 1.7 kWh per mile with up to 500 miles of range on the long-range version. (tesla.com) What’s missing is almost as important as what showed up. Tesla still is not plainly listing battery capacity on the public page. But the range and ef(wattev.com) miles if you multiply by 1.7 kWh per mile. That makes the rumored 548 kWh and 822 kWh figures directionally plausible, but they are still best treated as inferred or leaked values, not confirmed public specs from Tesla. (tesla.com) ### Why does the 500-mile figure matter? Class 8 trucking lives or dies o(tesla.com) do about 500 miles between charges starts to cover a lot more freight lanes without heroic scheduling. Tesla is pitching exactly that use case — long regional hauls with lower fuel and maintenance costs than diesel. The company’s page leans hard on total cost of ownership and says some local and regional operators could hit positive ROI before a normal diesel replacement cycle. (tesla.com) ### Is the charging story real now? More real than bef(tesla.com)Megacharger can deliver up to 1.2 MW, uses the MCS standard, and can add up to 60% of range in 30 minutes. That is the key line, because heavy-duty EV trucking stops working if trucks sit around charging for hours in the middle of a shift. Tesla also lists a lower-power 125 kW Basecharger for overnight or depot use. (tesla.com) ### Why is MCS such a big deal? Basically, MCS is what moves electric trucking from pilot projects to actual fleet (tesla.com)s nowhere near enough for giant battery packs on tight freight schedules. Megawatt charging means a fleet can think in driver hours, turnaround times, and yard throughput instead of just battery size. Tesla adopting MCS on the Semi matters because it lines up the truck with the charging direction the rest of the industry has been waiting for. (tesla.com) ### Wh(tesla.com) is becoming an operations story, not a concept story. In April 2025, WattEV said it had taken delivery of two Semis for use at the Port of Long Beach and had an agreement with Tesla for 40 more in 2026. The company said some California routes already hit as much as 550 miles a day, and it plans to add Tesla Gen-IV chargers while continuing to future-proof depots for megawatt charging. (wattev.com) ### I(tesla.com)d. Tesla’s Gigafactory Nevada page says the site is being expanded with its first high-volume Semi factory. So the product page is getting more specific at the same time the manufacturing footprint is still being built out. That usually means Tesla is moving from “yes, this exists” to “here is the commercial version we want fleets to plan around.” (tesla.com) ### So what actually changed? The big shift is that Tesla S(wattev.com)indow. But the catch is that the most viral numbers — especially exact battery capacity and cell format claims — still sit partly outside Tesla’s official public spec sheet. The safe read is simple: the charging and range story is now official enough for fleet planning, and the battery-pack math is close enough to show why this truck could matter. (tesla.com) The bottom line is that Tes(tesla.com)ic trucking. It is turning into a depot, charger, and route-planning problem — which is exactly when a vehicle starts becoming real.