The Magnesium Gambit: Estes Aims to Solve Electrification's Weight Problem

SAN FRANCISCO, CA – July 21, 2026 – In the global race to electrify everything, the biggest obstacle is often gravity itself. For decades, the energy storage industry has focused on improving the chemistry inside battery cells. But a stealthy San Francisco-based startup, Estes, argues that the true bottleneck is mass. Today, after two years of quiet development, the company has emerged with a bold claim: it has solved the materials science puzzle that could make our electrified future significantly lighter.

Estes announced its first commercial shipments of the Magnus™ battery system, a high-performance pack now in the hands of rail, marine, and on-highway customers. More significantly, it unveiled Levius™, the integrated manufacturing platform that makes it all possible. The company's gambit is to industrialize magnesium—the lightest structural metal on Earth—for use in battery systems, a feat that has eluded engineers for generations. By attacking the problem at the system level, Estes believes it can unlock a new performance tier for everything that moves.

“Electrification is an efficiency problem, and efficiency, at its limit, is a mass problem,” said Dustin Grace, CEO and co-founder of Estes, in today's announcement. “Every kilogram we remove is a kilogram our customers can convert into range, payload, or mission capability. Mass is the constraint that defines what electrification can and cannot do.”

The Metal That Wouldn't Cooperate

Magnesium's potential is a long-standing tale in materials science. It is 75% lighter than steel and 33% lighter than aluminum, and it is the eighth most abundant element in the Earth's crust. On paper, it is the perfect material for building lightweight, efficient structures. Yet in practice, its adoption has been plagued by a notorious reputation for being difficult, dangerous, and unreliable.

Historically, engineers have shied away from magnesium for four key reasons: it is highly flammable, susceptible to rapid corrosion, difficult to manufacture consistently, and lacks a mature industrial supply chain. These challenges have made it a non-starter for critical applications, especially in battery systems where safety and durability are paramount. The metal's electrochemical properties have also presented hurdles, with the divalent nature of magnesium ions (Mg²⁺) leading to sluggish performance compared to their lithium-ion counterparts.

While academic labs have made slow progress, with prototype magnesium-ion batteries delivering only 100-150 Wh/kg, the material has remained firmly in the realm of research, not reality. Estes is betting it has changed the equation.

Levius: A Full-Stack Solution to an Old Problem

Estes's core innovation is not a single wonder material but an end-to-end manufacturing system. The Levius™ platform is a vertically integrated processing stack designed to tame magnesium's volatile nature and turn it into a high-performance industrial product at scale.

“Our breakthrough was not developing a single material; it was engineering the end-to-end manufacturing system,” explained Cagkan Yildiz, CTO and co-founder of Estes. “We've built a family of flame-retardant magnesium alloys that retain full castability using the most advanced metal forming and coating technologies available, reengineered to operate as a full-stack solution from ingot to finished product.”

This system addresses magnesium's historic flaws head-on. A proprietary flame-retardant alloy has been third-party tested to meet stringent FAA safety standards, making it suitable for use inside aircraft. To combat corrosion, the company developed an ultra-energy-efficient coating process that reduces energy consumption by over 70% compared to conventional methods while creating ruggedized components for harsh marine or outdoor environments. Finally, Levius™ utilizes large-format semi-solid casting, a process that enables the production of structural components over two meters long at a cycle time of one part per minute, a rate compatible with high-volume automotive manufacturing.

The first product built on this platform, the Magnus™ battery pack, demonstrates the system-level payoff. Using commercially available battery cells, Magnus™ exceeds 225 Wh/kg in energy density at the pack level—a 30% improvement over comparable systems on the market, which typically range from 146 to 175 Wh/kg. This leap is achieved not by a novel cell chemistry, but by radically reducing the parasitic weight of the pack's housing, cooling systems, and structural components. When paired with next-generation silicon-rich cells, the company projects that figure could climb to 280 Wh/kg.

Unlocking Heavy Industry's Electric Future

The implications of this weight reduction extend far beyond consumer electric vehicles. Estes is targeting the sectors where the 'mass problem' is most acute: heavy-duty transport, rail, marine, and aerospace. In these industries, every kilogram of battery weight directly displaces a kilogram of paying cargo, passengers, or mission-critical equipment. A 30% lighter battery doesn't just improve efficiency; it can be the difference between a viable electric platform and an impossible one.

The Levius™ platform is also designed for the next generation of vehicle architecture. It enables highly integrated structures compatible with cell-to-pack, cell-to-chassis, and even cell-to-airframe designs. This means the battery enclosure is no longer dead weight but a load-bearing component of the vehicle itself, a trend pioneered by leading EV makers that Estes aims to accelerate. By providing a lightweight, structural, and fire-resistant material system, the company is positioning itself as a key enabler for a more integrated and efficient design philosophy.

Furthermore, Estes is building its entire operation on a domestic supply chain, from raw material to finished system. In an era of geopolitical instability and supply chain fragility, this U.S.-based manufacturing footprint offers a powerful strategic advantage, aligning with national security interests and 'Buy America' initiatives for critical infrastructure.

From Stealth to Scale: The Team and the Capital

Bringing a deep-tech, materials-based solution to market is a capital-intensive, high-risk endeavor. Estes's credibility is bolstered by its founding team, composed of engineers and operators from Tesla, Sila, and Cummins—companies at the forefront of electrification and battery technology. This pedigree suggests a team intimately familiar with the challenges of scaling battery production and vehicle integration.

That expertise has attracted a formidable coalition of deep-tech and strategic investors. The company has raised $20 million to date, with a recent round co-led by BMW iVentures and Fortescue Capital, the venture arm of the Australian industrial giant. The involvement of BMW iVentures signals strong interest from the automotive sector, while Fortescue's participation underscores the technology's potential for decarbonizing heavy industry. Early backing from firms like DCVC and Baukunst further validates the scientific and commercial thesis.

With its technology unveiled and its first products shipped, the company's challenge now shifts from research and development to industrial execution. As CEO Dustin Grace stated, “Our focus now is scale: expanding production to meet the customer contracts already signed.” With commercial systems now in the field, the industry will be watching closely to see if Estes can turn magnesium's long-held promise into industrial-scale reality.