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Tesla Semi and Roadster could be relying on a “battery breakthrough”

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Elon Musk and Tesla have made some bold claims for the new Tesla Semi and Roadster. Those who understand batteries have been scratching their heads trying to figure out how the company can deliver the specs it’s promising – and concluding that the only possible way is some as-yet-unannounced advancement in battery technology.

Musk says the Tesla Semi will be able to haul 80,000 pounds for 500 miles, and recharge to 400 miles in 30 minutes, which would revolutionize the trucking industry. As for the Roadster, its promised 0-60 acceleration of 1.9 seconds effectively shuts down every one of the world’s baddest supercars, and its touted 620-mile range would be double that of any EV produced to date.

However, industry experts are questioning Tesla CEO Elon Musk’s touted range and charging capabilities, saying the specifications defy current physics and battery economics.

According to Bloomberg, analysts at Bloomberg New Energy Finance point out that Tesla Semi’s announced specs would require a battery capacity of between 600 and 1,000 kilowatt hours (6-10 times the size of the largest Model S battery). Using current technology, an 800 kWh battery pack would weigh over 10,000 pounds and cost more than $100,000. That’s just for the battery – Tesla has said its entire truck will start at $150,000. It seems plain that Tesla is counting on falling battery prices to square the circle. “The first Tesla Semis won’t hit the road until late 2019,” Bloomberg points out. “Even then, production would probably start slowly. Most fleet operators will want to test the trucks before considering going all-in. By the time Tesla gets large orders, batteries should cost considerably less.”

It isn’t just the capacity of the battery that’s causing analysts to wear out their calculators – Musk’s claim that the Tesla Semi will be able to add 400 miles of charge in 30 minutes would require a charging system 10 times more powerful than Tesla’s current Supercharger – which is already by far the most powerful in the industry.

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Tesla Semi Megacharger port could support 1 MW of power.

“I don’t understand how that works,” said Bloomberg New Energy Finance EV Analyst Salim Morsy. “I really don’t.” Tesla’s current generation of Superchargers have a power output of 120 kilowatts and can add about 180 miles of range to a Model S battery in 30 minutes. To meet Tesla’s charging claim for the Semi would require the promised Megacharger to deliver an output of at least 1,200 kW.

Perhaps Tesla’s biggest bombshell is the promise that it will guarantee truckers electricity rates of 7 cents per kilowatt hour, which Bloomberg estimates could translate to fuel savings of up to $30,000 a year. Musk says that adding solar panels and battery packs at the charging stations will account for at least part of the cost reduction. However, BNEF’s Salim Morsy insists that Tesla will have to heavily subsidize those electricity rates – he estimates that Tesla will pay a minimum of 40 cents per kWh. “There’s no way you can reconcile 7 cents a kilowatt hour with anything on the grid that puts a megawatt hour of energy into a battery,” Morsy said. “That simply does not exist.”

Of course, that’s no different from what Tesla does for its current Supercharger network, offering free electricity to many customers, while paying almost $1 per kWh to produce it, according to Morsy’s estimate.

And how about that Roadster? To deliver its promised range of 620 miles, it will need a 200 kWh battery pack, twice the size of Tesla’s largest currently available pack. Mr. Morsy predicts that Tesla will stack two battery packs, one on top of the other, beneath the Roadster’s floor.

Even with a double-decker pack however, it’s hard to escape the conclusion that Tesla is counting on improving battery tech to make the Roadster, like the Semi, feasible. Battery density has been improving at a rate of about 7.5 percent a year, and that’s without any major breakthrough in battery chemistry.

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“The trend in battery density is, I think, central to any claim Tesla made about both the Roadster and the Semi,” Morsy said. “That’s totally fair. The assumptions on a pack in 2020 shouldn’t be the same ones you use today.”

A massive battery pack not only enables greater range – it’s also a key element in the Roadster’s world-beating 0-60 acceleration. Jalopnik’s David Tracy spoke with battery expert Venkat Viswanathan, a Mechanical Engineering Assistant Professor at Carnegie Mellon, who says that the 1.9-second figure actually seems reasonable.

Viswanathan explains that the power output of a motor is limited by the power draw from each battery cell. Because the Roadster’s pack is double the size, the power draw may not be that much more than that of a Ludicrous Model S.

Viswanathan told Jalopnik that the most modern battery cells offer specific energy of about 240 watt-hours per kilogram. Using that assumption, the Roadster’s 200 kWh battery pack should weigh roughly 1,800 pounds, a huge advance over the previous-generation Roadster. With clever use of lightweight materials, the Roadster could still come out under the nearly two-ton curb weight of the Nissan GT-R, an acceleration benchmark among sports cars.

Viswanathan concludes that a 0-60 time of 1.9 seconds and a range of 620 miles are quite feasible, although there are several other factors that will come into play – much depends on the vehicle’s tires and aerodynamics.

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Meanwhile, at least one analyst thinks Tesla’s latest revelations (or claims, or fantasies, depending on your point of view) have implications that go far beyond the Semi and the Roadster. Michael Kramer, a Fund Manager with Mott Capital Management, told Marketwatch that he suspects improved battery capacities and charging times could make their way into all future Tesla vehicles.

“I’d have to imagine that Tesla has figured out how to put this technology on all of their cars, which means every car could get a full charge in under 30 minutes,” Kramer wrote. Once the Model S “is equipped with the 200 kWh battery pack in the new Roadster, which I can’t imagine is too far down the road, the range issue for the Tesla is officially dead.” (Elon Musk has said that Models S and X will not get physically larger packs, but improved energy density could increase capacity while keeping the size of the pack the same.) Someday soon, Kramer says, “The Model S would likely be able to drive further on one charge than a car on a full tank of gasoline.”

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Note: Article originally published on evannex.com, by Charles Morris

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Energy

Tesla China’s Megafactory helps boost Shanghai’s battery exports by 20%: report

Located in the Lingang New Area of the Shanghai Free Trade Zone, the Tesla Megafactory has been running at full throttle since opening in February.

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Credit: Tesla Asia/X

Reports from China have indicated that the Tesla Shanghai Megafactory has become a notable player in China’s booming battery export market.

Located in the Lingang New Area of the Shanghai Free Trade Zone, the Tesla Megafactory has been running at full throttle since opening in February. It produces Tesla Megapack batteries for domestic and international use.

Tesla Shanghai Megafactory

As noted in a report from Sina Finance, the Tesla Shanghai Megafactory’s output of Megapack batteries helped drive a notable rise in lithium battery shipments from the city in the first three quarters of 2025. This is quite impressive as the Megafactory is a rather young facility, though it has been steadily increasing its production capacity.

“The establishment of this benchmark factory has not only driven the rapid development of Shanghai’s energy storage industry but also become a new growth engine for foreign trade exports. Driven by the Tesla energy storage factory’s opening, Shanghai’s lithium battery exports reached 32.15 billion yuan ($4.5 billion) in the first three quarters, a 20.7% increase,” the publication wrote.

Ultimately, the Shanghai Megafactory has proved helpful to the city’s “new three” industries, which are comprised of new energy vehicles, lithium batteries, and photovoltaic systems. Exports of the “new three” products reached 112.17 billion yuan ($15.7 billion), a 6.3% year-over-year increase during the same period. The city’s total trade volume grew 5.4% year-over-year as well, with exports up 11.3%, driven largely by the clean energy sector’s performance.

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Energy storage is helping Shanghai

Since opening in February, the Shanghai Megafactory has been firing on all cylinders. In late July, Tesla Energy announced that the new battery factory has successfully produced its 1,000th Megapack unit. That’s quite impressive for a facility that, at the time, had only been operational for less than six months. 

Speed has always been a trademark of the Shanghai Megafactory. Similar to Tesla’s other key facilities in China, the Megafactory was constructed quickly. The facility started its construction on May 23, 2024. Less than a year later, the site officially started producing Megapack batteries. By late March 2025, Tesla China noted that it had shipped the first batch of Megapack batteries from the Shanghai plant to foreign markets.

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Elon Musk

“Take Back Tesla:” Unions and corporate watchdogs launch campaign against Musk’s 2025 pay package

A new shareholder campaign is calling for Tesla investors to vote against Elon Musk’s proposed 2025 CEO Performance Award.

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Wcamp9, CC BY 4.0 , via Wikimedia Commons

A new shareholder campaign is calling for Tesla investors to vote against Elon Musk’s proposed 2025 CEO Performance Award, arguing it would deepen governance risks and weaken corporate accountability.

Ahead of Tesla’s Q3 2025 earnings report, a coalition of unions and watchdogs launched the “Take Back Tesla” initiative, urging investors to reject Musk’s pay proposal at next month’s annual meeting. The plan would grant the CEO additional shares worth nearly $1 trillion over ten years, expanding his ownership stake in the company to about 25%.

Unions and watchdogs argue that Elon Musk’s proposed plan rewards distraction

The Take Back Tesla campaign is backed by groups such as the American Federation of Teachers, Public Citizen, Americans for Financial Reform, Ekō, People’s Action, and Stop the Money Pipeline. 

As could be seen on the campaign’s website, the groups are arguing that Musk’s focus on political ventures and external businesses has distracted him from leading Tesla. The group’s website called Musk’s new CEO Performance Award “outrageous” as it involves an amount of wealth that is unreachable even by today’s top executives.

“In order to unlock the full amount of shares proposed in this compensation plan, Tesla’s value would need to increase dramatically to $8.5 trillion. As Tesla’s proxy statement points out, that would make Tesla roughly 2x as valuable as the most valuable company in the world (Nvidia) today. Arguably, growing Tesla’s value to double the value of Nvidia would justify paying Musk something like double the compensation of Nvidia’s CEO. 

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“But the annual value of Musk’s trillion dollar pay package isn’t just 2 times what Nvidia’s CEO made last year (just under $50 million); it’s more than 2,000 times what Nvidia’s CEO made last year. At his current compensation of $49.9 million, it would take Nvidia’s CEO over 2,000 years to earn the amount that Elon Musk could earn, on average, per year for the next ten years,” the group argued.

Board defends package as necessary, though some pushback is present

Tesla’s board insists the compensation plan is essential to retain Musk and sustain the company’s innovation in AI, robotics, and self-driving technology. The automaker noted that previous skepticism from proxy firms such as ISS and Glass Lewis preceded a 20x rise in Tesla’s market capitalization since 2018, a feat that seemed unrealistic when it was proposed.

As noted in a CNBC report, New York City Comptroller Brad Lander, who oversees a $300 billion pension fund, stated that while Tesla has been a great investment, he “vociferously opposes” Elon Musk’s proposed 2025 CEO Performance Award. 

“Most of the time we’ve held Tesla stock, it has been a solid investment, it’s grown over time, and that’s why we haven’t chosen to dump it, he said, adding that he views Tesla’s Board as “insufficiently independent” since they have allowed Musk to be “absentee CEO.” Landers also argued that Tesla as a whole has failed to hit its targets when it comes to its Robotaxi program and its Full Self-Driving technology.

For context, Elon Musk has maintained that his 2025 CEO Performance Award is not designed for him to gather even more wealth. Instead, he stressed that it is required so that he could take a controlling stake in the company.

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Investor's Corner

Tesla Q3 2025 earnings: What analysts expect

The automaker delivered a record 497,099 vehicles and logged its highest-ever energy storage sales in Q3 2025. 

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Credit: Tesla China

Tesla’s (NASDAQ:TSLA) Q3 2025 earnings, which would be released after markets close today, could prove to be a test of confidence for the company’s shareholders. 

The automaker delivered a record 497,099 vehicles and logged its highest-ever energy storage sales, but analysts noted that these gains might have come at a cost. 

Record vehicle deliveries

Tesla’s profit per share is expected to fall about 25% year over year to around $0.53–$0.55, even as revenue rises from 4% to 6%, as noted in a report from Market Pulse. Analysts noted that Tesla’s record quarter was partly fueled by buyers rushing to complete purchases before the U.S. federal EV tax credit expired in September, a surge that could dampen Q4 demand. The company also dipped into its inventory to reach the record delivery number.

Analysts expect automotive gross margin (excluding regulatory credits) to land between a conservative 16.5% and 17%. This suggests that a good portion of Tesla’s Q3 delivery growth came from aggressive price cuts. If margins fall below 16.5%, it could hint at more cost pressures that the company would have to handle in the coming months.

Tesla’s Energy segment, meanwhile, is expected to act as a stabilizer. The business deployed 12.5 GWh of storage in Q3, driven by strong demand from AI data centers. Analysts expect this high-margin division to partially cushion the hit from the automaker’s thinner car profits.

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AI, FSD, and Musk’s role

Tesla’s lofty valuation, trading about 17% above the average analyst consensus of $365, would likely depend heavily on investor belief in its AI and robotics initiatives. Industry watchers have stated that management must deliver credible updates on Full Self-Driving and the Robotaxi program to help justify the company’s current valuation.

Elon Musk’s proposed 2025 CEO Performance Award, which proxy advisors have urged shareholders to reject, would likely be discussed in the Q3 2025 earnings call has well. Musk has hinted that a failed vote could jeopardize Tesla’s AI strategy, making the company’s upcoming results quite crucial for market confidence.

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