Tesla Semi’s Latest Makeshift Megacharger Suggests Major Battery Upgrade

Perhaps this is a forecast of the work of Tesla’s ‘Roadrunner Project’ and million-mile battery tech?

Tesla unveiled its Semi back in 2017, and it has been spotted in the wild on numerous occasions. One of the main questions, when the Semi was seen crossing the country, was how was it going to charge? It couldn’t possibly rely on a normal Supercharger, right?

Well, it sort of did. Tesla actually had to make a setup that would allow the Semi to pull from multiple Superchargers at the same time. In fact, people saw the Tesla Semi connected to five Superchargers while charging.

Clearly, this was due to the Semi’s massive battery pack. However, the charging situation can’t remain this way. Tesla has plans to build out Megachargers for the Semi, but since the vehicle is not yet being produced or delivered to customers, it makes no sense to build a charging network yet.

With CEO Elon Musk recently emailing his employees that it’s time to bring the Tesla Semi to volume production, it’s also time to nail down the charging situation.

More recent sightings of the Tesla Semi out in public have revealed that the truck now uses just two Superchargers to juice up. More interestingly, these are two 150 kW V2 Superchargers rather than the new, more powerful V3 units.

As you can see, it was the red Tesla Semi carrying cars for end-of-quarter deliveries. The truck was spotted at the Rocklin Supercharger in California, which is not too far from Sacramento.

Is the Tesla Semi already using million-mile batteries produced by Tesla? Is this related to the Roadrunner Project? What’s up with the Maxwell and Hibar situation? There are so many unanswered questions here. Hopefully, we’ll learn much more about Tesla’s battery plans at the upcoming Battery and Powertrain Investor day in September.

Source: Teslarati

This article originally appeared on Inside EVs.


May 26, 2019
This is not solely because of new battery technology. The truck uses a certain amount of electric power, which is supplied by the battery. No matter what technology the battery has, it's going to need to be recharged with at least that much power. If the chargers are v2 there's a limit to how much power they can supply in a given amount of time again no matter what type of battery is in the truck.

Most likely the truck didn't have to go much further before it was going to stop for a while so only needed a smaller charge.


Active Member
Jun 8, 2015
This does not suggest a major battery upgrade. The system was always going to be modular with battery packs and motors sharing a switchable bus. It would be crazy to inflexibly connect all the battery cells into a single pack.

We don't know yet how many amps they are willing to put through a single connection.
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high fiber member
Apr 21, 2015
either MT or TN
You could see the driver backing up by himself, rather than cameras on the trailer and semi that would allow software to do it for him. Interesting.

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