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SpaceX is installing Tesla battery packs on its Starship MK1 rocket prototype

SpaceX appears to be installing numerous off-the-shelf Tesla battery packs on its Starship Mk1 prototype. (NASASpaceflight - bocachicagal)

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First noticed by NASASpaceflight.com forum member “exilon”, SpaceX appears to have selected off-the-shelf Tesla battery packs as the power storage method of choice for its Starship Mk1 prototype, currently in the midst of a busy period of integration

Potentially taken directly from Tesla Model S/X powertrains otherwise headed for recycling, SpaceX technicians have spent the last 24 or so hours attaching numerous battery packs to part of a Starship subsystem known as header tanks. This is the latest addition to SpaceX and Tesla’s relatively close relationship – the two have begun to work together to solve challenges with materials science, batteries, and more within the last 12-24 months.

While initially surprising, the appearance of battery packs quite literally taken from Tesla Model S/X vehicles or their Gigafactory assembly line actually makes a lot of sense. By using prepackaged, off-the-shelf battery systems with industry-leading power management capabilities, SpaceX is probably saving a huge amount of time, money, and effort. If the battery packs were already nearing the end of their useful automotive lives, the net cost could very well approach zero, aside from what looks like a minimal mounting brace. It’s possible that SpaceX has even pursued modifying and certifying large Tesla-derived battery packs for use on orbital Starship missions.

A SpaceX technician is pictured mounting multiple Tesla battery packs on a Starship Mk1 header tank on September 23rd. (NASASpaceflight – bocachicagal)
This screenshot from a 2017 Tesla Model S battery teardown is almost identical to the batteries pictured above in Boca Chica, Texas. (YouTube – jehugarcia)

These battery packs were spotted by an eagle-eyed forum user who was first to recognize the hardware for what it likely was. Per the above photo, SpaceX appears to have joined two self-contained Tesla battery packs into single units that were then installed on a header tank. Knowing that the highest capacity Tesla offers is ~100 kWh, the 2×2 packs could store up to 400 kWh and offer instantaneous power output (ignoring thermal limitations) well into the megawatt (MW) range. It’s unclear if the first header tank also had batteries attached but SpaceX technicians began installing that tank inside Starship’s nose cone on the evening September 22nd. Tank #2 will likely follow in the next 24 hours per Musk’s indication that Starship Mk1 would be stacked to its full height on Wednesday.

A Starship header tank on the move on September 22nd. Starship will have two tanks – one for methane and one for oxygen. (NASASpaceflight – bocachicagal)

For unknown reasons, SpaceX is choosing to mount the ~1000 kg (2200 lb) battery pack pairs directly onto the outside of one of Starship Mk1’s two header tanks. These tanks compliment the rocket prototype’s main propellant tanks and are meant to serve as small reserves of fuel (methane) and oxidizer (oxygen) that can be pressurized independently. During dramatic in-space and in-atmosphere maneuvers, the g-forces exerted on Starship could easily find the vehicle’s propellant pushed away from the ‘bottom’ of its main tanks, creating bubbles or voids that can damage and destroy rocket engines if ingested.

Pressurizing the entirety of the main tanks (a cylinder measuring 9m by ~40m or 30×130 ft) is extremely impractical – hence the need for much smaller header tanks. Falcon 9 boosters are able to sidestep this issue because they are small and light enough (relatively speaking) that cold gas thrusters can efficiently generate the positive Gs needed to safely ignite its engines for recovery and landing maneuvers. Empty, Starship alone will likely weigh no less than 4-6 times as much as a Falcon 9 booster (~25 tons, 55,000 lb).

Technicians install some of the external propellant lines Starship will need to fuel its tanks and feed propellant from its nose’s header tanks to its engine section. (NASASpaceflight – bocachicagal)

According to CEO Elon Musk, SpaceX has decided to install those header tanks in the very tip of Starship Mk1’s conical nose to help balance out the vehicle’s center of mass. As a side-effect, SpaceX will have to install feed lines that run the entire length of the spacecraft and protect them with steel aero-covers. It’s unclear if this design choice is necessitated by Starship’s early, prototypical form or if – once outfitted with crew quarters or a functional cargo bay – it’s possible that that added mass will serve as enough of a counterbalance to preclude the need for ballast in the nose.

Workers install a section of raceway – meant to protect plumbing lines and cabling – on the bottom of Starship Mk1’s nose section. (NASASpaceflight – bocachicagal)

Musk posted a view inside an adjacent SpaceX fabrication facility in Boca Chica on September 23rd, showing a large row of staged steel sheets that will eventually be formed into aerodynamic shrouds for Starship Mk1’s raceways, fins, and wings.

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Eric Ralph is Teslarati's senior spaceflight reporter and has been covering the industry in some capacity for almost half a decade, largely spurred in 2016 by a trip to Mexico to watch Elon Musk reveal SpaceX's plans for Mars in person. Aside from spreading interest and excitement about spaceflight far and wide, his primary goal is to cover humanity's ongoing efforts to expand beyond Earth to the Moon, Mars, and elsewhere.

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Donald Trump confirms ‘good’ relationship with Elon Musk after public feud

Trump stated that he and Elon Musk have spoken “on and off, a little bit” since meeting at Charlie Kirk’s memorial service in September.

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Credit: Elon Musk/X

United States President Donald Trump has confirmed that his relationship with Elon Musk has improved following months of tension. 

Speaking with reporters aboard Air Force One, Trump stated that he and Elon Musk have spoken “on and off, a little bit” since meeting at slain conservative activist Charlie Kirk’s memorial service in September. Trump also noted that he now considers their relationship “good.”

Trump stated that his feud with Musk has cooled after ‘stupid moment’

Trump addressed the pair’s earlier feud, which unfolded publicly earlier this year after Musk publicly opposed Trump’s “Big Beautiful Bill” and later stepped away from his administration’s advisory role tied to the DOGE initiative. The U.S. president addressed the dispute, describing it as a brief lapse in judgment, as noted in an Insider report.

“He had a bad spell, he had a bad period. He had a bad moment,” Trump said. “It was a stupid moment in his life, very stupid. I’m sure he’d tell you that. But I like Elon, and I suspect I always will.”

Trump’s remarks suggest a thaw in what had been one of the United States’ most visible political rifts, which saw Musk accusing Trump of being on Epstein’s list and Trump threatening to take away Tesla and SpaceX’s subsidies. In his recent comments, however, Trump noted that “I like Elon, I’ve always liked him.”

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Musk has mostly stayed quiet on Trump, but he still criticizes administration officials

Musk has publicly toned down his criticism of Trump in recent months, pausing discussion of a third political party he once floated after Trump’s megabill passed. While his stance toward the former president appears to have softened, with the two men publicly making peace during Kirk’s memorial, Musk has continued to spar with members of Trump’s administration.

Just last week, he engaged in a dispute with Transportation Secretary Sean Duffy over NASA leadership after Duffy opened one of SpaceX’s contracts for review. Musk expressed his frustration against Duffy on X, stating that “Sean Dummy is trying to kill NASA” and pledging that SpaceX would be taking humans back to the Moon with Starship before any other company.

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IF Metall chair to Elon Musk: “Give us a chance” as Tesla Sweden strike hits 2 years

The official emphasized that Swedish unions function under a cooperative framework that benefits both employers and workers.

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Credit: @NicklasNilsso14/X

IF Metall’s strike against Tesla Sweden has entered its third year, with union chair Marie Nilsson urging Elon Musk to reconsider his perception of organized labor. 

Speaking ahead of the strike’s second anniversary, Nilsson stated that Tesla should understand that Swedish unions operate differently from their American counterparts, and they deserve the opportunity to prove it.

IF Metall leader urges Tesla to understand Sweden’s system

In an interview with Dagens Arbete (DA), Nilsson stated that Tesla’s skepticism toward labor unions likely stems from the company’s experience in the United States, where labor organizations have historically taken a more combative approach. She emphasized that Swedish unions function under a cooperative framework that benefits both employers and workers.

“I can certainly understand that Elon Musk and Tesla are skeptical of the trade union movement. They have experience with American unions that operate in a completely different environment and that have to be militant in a different way. 

“I would say: Don’t compare Swedish unions with American ones. Let’s give us a chance. Signing a collective agreement in Sweden also does not mean that you are committed to collective agreements in the rest of the world, but it is the practical system we have here to regulate the conditions,” Nilsson stated.

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Nilsson rejected the idea that Tesla Sweden is being unfairly targeted

The IF Metall leader also reflected on the conflict’s duration, calling it unprecedented in Swedish labor history. While she admitted the union should have organized Tesla workers earlier, she maintained that the movement remains determined. “No one can possibly imagine what it is like not to go to work for two years,” Nilsson said, praising members who have continued to maintain their protest against the EV maker.

Nilsson also rejected any notion that the union is targeting Tesla unfairly. “Tesla is not a poor little company that we are trying to crush in any way,” she said. “But this is a global player, and we cannot accept that they should have different conditions in Sweden than other entrepreneurs have.” 

She confirmed that IF Metall is now prepared to take greater risks, especially after the Swedish Mediation Institute stepped back from talks. “It is impossible for us to do anything else. This is a large and important player, and therefore we need to take this conflict. It is impossible for us to do anything else,” Nilsson said.

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Tesla analyst: ‘near zero chance’ Elon Musk’s $1T comp package is rejected

“There is a near-zero chance that $TSLA shareholders will vote down Elon’s new proposed comp plan at the Nov 6 shareholders’ meeting.”

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A Tesla analyst says there is “zero chance” that CEO Elon Musk’s new compensation package is rejected, a testament to the loyalty and belief many shareholders and investors have in the frontman.

Tesla investors will vote on November 6 at the annual Shareholder Meeting to approve a new compensation package for Musk, revealed by the company’s Board of Directors earlier this month.

The package, if approved, would give Musk the opportunity to earn $1 trillion in stock, an ownership concentration of over 27 percent (a major request of Musk’s), and a solidified future at the company.

The Tesla Community on X, the social media platform Musk bought in 2023, is overwhelmingly in favor of the pay package, though a handful of skeptics remain.

Nevertheless, the big pulls of this vote are held by proxy firms and other large-scale investors. Two of them, Institutional Shareholder Services (ISS) and Glass Lewis, said they would be voting against Musk’s proposed compensation plan.

Tesla CEO Elon Musk’s $1 trillion pay package hits first adversity from proxy firm

Today, the State Board of Administration of Florida (SBA) said it would vote in favor of Musk’s newly-proposed pay day, making it the first large-scale shareholder to announce it would support the CEO’s pay.

One analyst said that Musk’s payday is inevitable. Gary Black of the Future Fund said today there is a “near-zero chance” that shareholders will allow Musk’s pay package to be rejected:

There is a near-zero chance that $TSLA shareholders will vote down Elon’s new proposed comp plan at the Nov 6 shareholders’ meeting.”

He added an alternative perspective from Wedbush’s Dan Ives, who said that he had a better chance of starting for the New York Yankees than the comp package not being approved.

Black’s the Future Fund sold its Tesla holdings earlier this year. He explained that the firm believed the company’s valuation was too disconnected from fundamentals, citing the P/E ratio of 188x and declining earnings estimates.

The firm maintained its $310 price target, and shares were trading at $356.90 that day.

Shares closed at $452.42 today.

The latest predictions from betting platform Kalshi have shown Musk’s comp package has a 94 percent chance of being approved:

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