You may assume that Tesla’s Semi Truck uses the standard NACS connector, which is about the size of a gas nozzle. But these trucks use massive batteries, and because they’re built for the logistics industry, they need to charge quite quickly. That’s where Tesla’s new Megacharger stations come into play.Tesla is slowly building Megacharger stations to accommodate the Semi Truck (and future industrial EVs, presumably). Now, in new photos shared by@RodneyaKent on Twitter, we can get a good look at the new Megacharger station in Baker, California.This is one of the first public Megacharger stations—there are only a handful of companies (besides Tesla) that are currently using Tesla Semi Trucks, and this particular charging station will facilitate Tesla Semi activity between California and Nevada. (The city of Baker is just a hop-skip away from Las Vegas. Not to mention, Tesla has a Gigafactory in Nevada.)
Anyway, the Megacharger connector is quite large. It’s much bigger than an NACS connector, and it’s also very rigid. As for actual charging power, the Megacharger is believed to have an output level of about one megawatt (that’s 1,000 kW). Elon Musk says that it can add 400 miles of range to the Tesla Semi after half an hour of charging, though neither of these points are actually confirmed.
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The units at this charging station areÂlabeled “MCU1”, which may stand for “Megawatt Charging Unit V1.” But they have  a surprisingly “low” output of 375 kW. For what it’s worth, this is only a semi-permanent installation at a Supercharger station, and future installations will probably offer much faster charging speeds. (The term “MCU1” could also stand for “Mobile Charging Unit 1.")
Note that the Megacharger connector is probably incompatible with Tesla’s upcoming Cybertruck, despite what some reports suggested. Tesla has not offered a timeline for Megacharger deployment, which makes sense, as the Tesa Semi Truck isn’t a consumer vehicle.
