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Stellantis unveils solid-state battery for EVs

Stellantis validated solid state battery cells for EVs: ultra-dense, fast-charging, and AI-optimized. Launching demo fleet by 2026.

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(Credit: Stellantis)

Stellantis N.V. and Factorial Energy have validated Factorial’s automotive-sized FEST® solid-state battery cells, a major milestone for next-generation electric vehicle (EV) batteries. The breakthrough positions Stellantis and Factorial to advance EV performance with lighter, more efficient batteries.

“Reaching this level of performance reflects the strengths of our collaboration with Factorial.

“This breakthrough puts us at the forefront of the solid-state revolution, but we are not stopping there. We continue working together to push the boundaries and deliver even more advanced solutions, bringing us closer to lighter, more efficient batteries that reduce costs for our customers,” said Ned Curic, Stellanti’s Chief Engineering and Technology Officer.

The 77Ah FEST® cells achieved an energy density of 375Wh/kg, supporting over 600 cycles toward automotive qualification. Unlike lithium-ion batteries, these solid-state cells charge from 15% to over 90% in 18 minutes at room temperature and deliver high power with discharge rates up to 4C. Factorial’s AI-driven electrolyte formulation enables performance in temperatures from -30°C to 45°C (-22°F to 113°F), overcoming previous solid-state limitations.

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“Battery development is about compromise. While optimizing one feature is simple, balancing high energy density, cycle life, fast charging, and safety in an automotive-sized battery with OEM validation is a breakthrough,” said Siyu Huang, CEO of Factorial Energy. “This achievement with Stellantis is bringing next-generation battery technology from research to reality.”

The collaboration optimizes battery pack design for reduced weight and improved efficiency, enhancing vehicle range and affordability. Stellantis invested $75 million in Factorial in 2021 and plans to integrate these batteries into a demonstration fleet by 2026. This fleet will validate the technology’s real-world performance, a critical step toward commercialization.

The milestone aligns with Stellantis’ push for sustainable EV solutions, leveraging Factorial’s disruptive technology to meet the rising demand for high-performance batteries. As the companies refine pack architecture, the validated cells promise faster charging and greater efficiency, potentially reshaping the EV market. With the demonstration fleet on the horizon, Stellantis and Factorial are poised to lead the solid-state battery push, delivering cost-effective, high-range EVs to consumers.

Maria--aka "M"-- is an experienced writer and book editor. She's written about several topics including health, tech, and politics. As a book editor, she's worked with authors who write Sci-Fi, Romance, and Dark Fantasy. M loves hearing from TESLARATI readers. If you have any tips or article ideas, contact her at maria@teslarati.com or via X, @Writer_01001101.

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Tesla bull, ARK head Cathie Wood says brand damage is not long-term

Cathie Wood of ARK Invest does not believe Tesla brand damage is a long-term problem.

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Tesla bull and head of ARK Invest, Cathie Wood, admitted during an interview with Bloomberg that she does believe the company has experienced some brand damage due to CEO Elon Musk’s political involvement. However, she does not believe it is a long-term issue.

Over the past eight months, Musk’s involvement in the U.S. political landscape has swayed some to stop supporting Tesla, others to ditch their cars, and some to boycott the brand altogether. Inversely, others have started supporting Musk, Tesla, and its products as a nod of support for what he’s done for government efficiency.

The perspective on how Musk’s involvement has impacted Tesla truly varies. Its impact has been noticeable, especially in Europe, as some countries have seen some pretty drastic declines in deliveries since the start of the year.

However, some of this can be attributed to the company’s switchover to new production lines for the updated Model Y. Some can also be blamed on economic issues, as the cost of living is still relatively high. There is no denying that at least some of the impact has come from those who simply disagree with Musk and are choosing not to buy his companies’ products.

Wood is among Tesla’s most outspoken bulls and has tremendously high expectations for the stock moving into the late 2020s and into the 2030s. In a recent interview, she highlighted the brand’s exceptional potential moving forward, but did address some of the short-term concerns, especially regarding Tesla’s perception amongst the public:

“I think he feels he has a duty to the country to make sure we don’t ‘blow ourselves up’ with these deficits. Brand damage? Yes. I do not believe [it is long-term]. Tesla, we believe, will have a lock on the Robotaxi business in the U.S., and we believe they are going to proliferate through the United States, especially if we remove regulation from a state level to a federal level, which we believe will happen.”

Musk announced during the company’s most recent Earnings Call that he would step back from his government duties and return to Tesla in a more consistent role, as his work with the Department of Government Efficiency (DOGE) seemed to be winding down to a certain extent.

Tesla CEO Elon Musk confirms time spent with DOGE will drop ‘significantly’

It was a big win for Tesla investors, as many were interested in Musk returning his focus to the automaker, especially as 2025 is expected to be a year of many catalysts between the Robotaxi launch, affordable models coming into play, production of the Semi starting at the tail-end of the year, and the Optimus robot continuing consistent development.

Wood was quick to point out that Tesla is not the only car company that was suffering with lagging sales, as a macro-level perspective on the automotive industry proves that many automakers are looking for ways to avert disaster due to the ongoing tariff war.

Tesla is still the highest-valued automaker in the world, and it has plenty of bullish points to look forward to as the year nears the halfway point.

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Tesla offers interesting promo to future ride-hailing rival’s drivers

Lyft drivers will get $1,000 in vehicle credits if they complete 100 rides by the cutoff date for the promo.

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(Credit: Tesla)

Tesla has offered an interesting promotion for its vehicles to the drivers of one of its future ride-hailing rivals as it continues to work toward the launch of its autonomous Robotaxi platform.

This morning, Tesla launched a $1,000 off promotion to Lyft drivers who plan to utilize one of the company’s EVs for ride-hailing purposes. The promo applies to all five Tesla models: the Model S, Model 3, Model X, Model Y, and Cybertruck.

It is not offered at the point of sale. Instead, to ensure the vehicle is properly utilized for ride-hailing purposes and to prove the discount, Tesla will offer $1,000 in vehicle credits to the Lyft driver after they complete 100 trips on or before July 13, 2025. Delivery must be taken by June 30.

It is an interesting move by Tesla because Lyft, along with Uber, will become a rival in the coming years as the companies continue to develop driverless ride-hailing platforms of their own. Lyft has partnered with May Mobility and Mobileye to develop driverless, fully autonomous vehicles purpose-built for ride-hailing.

Tesla plans to launch its Robotaxi platform next month in Austin, Texas.

Tesla hints at June 1 launch of Robotaxi platform in Austin

Meanwhile, Lyft’s plans are more down the road. Earlier this year, the company said it would launch autonomous rides sometime next year.

For now, the move seems to be just another way Tesla is incentivizing consumers to buy one of their vehicles. Earlier this week, it also launched another $1,000 off promo for teachers, students, retirees, active-duty members, their spouses, and surviving spouses.

Previously, Tesla only offered that discount to military members.

It is unclear why Tesla would be offering these discounts, but it could be more of a thank you or an act of recognition, more than anything. If it were a measure that was taken to increase demand, it would be substantially more of a discount. For example, when Tesla was trying to rid its inventory of legacy Model Y units as the new, updated vehicle was set to be released, discounts were over $5,000.

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Tesla Giga Berlin seems to be using FSD Unsupervised to move Model Y units

Tesla may be doing something quite special in the Giga Berlin-Brandenburg complex.

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Tesla FSD Unsupervised Giga Texas

Tesla may be doing something quite special in the Giga Berlin-Brandenburg complex. Based on observations from a recent drone flyover of the site, it appears that Tesla may also be using FSD Unsupervised to move freshly produced Model Y vehicles to the factory’s staging area.

New Drone Footage

Recent footage of the Giga Berlin complex from longtime Tesla watcher Tobias Lindh included several interesting updates around the Model Y factory. These include a new warehouse that is currently being built, as well as a tunnel is currently being constructed. More interestingly, the drone operator observed that some cars now seem to be moving to Giga Berlin’s distribution area without human drivers.

If the drone operator’s observations prove accurate, it would be quite an impressive accomplishment for Tesla. FSD Unsupervised, after all, has only been confirmed in vehicles that are produced at the Fremont Factory and Gigafactory Texas.

https://twitter.com/NicklasNilsso14/status/1922799362511376892

Potential Next Steps

If Giga Berlin is now using FSD Unsupervised to transport some Model Y units from the factory building to the site’s staging area, it might only be a matter of time before Tesla also implements a similar system for Gigafactory Shanghai. The Shanghai-based Tesla plant, after all, is the company’s largest factory by volume, and it also serves as a primary vehicle export hub. FSD Unsupervised could then pave the way for Giga Shanghai to operate in an even more optimal manner. 

FSD Unsupervised is the cornerstone of Tesla’s robotaxi business, which is expected to start rolling out in Austin, Texas, next month. Previous reports have suggested that Tesla is pushing hard in its preparations to roll out its robotaxi service this June. Tesla has reportedly even worked and trained with Austin’s first responders from the fire and police departments as part of its robotaxi service preparations.

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Check out a recent flyover of the Tesla Giga Berlin complex in the video below.

https://www.youtube.com/watch?v=p9RFgOiFiU0
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