EV Batteries Factorial Reaches Nasdaq as Solid-State Batteries Move From Road Test to Funding Test The SPAC listing gives the Mercedes, Stellantis, Hyundai, and Kia partner fresh capital after a 745-mile EQS demonstration raised expectations for lithium-metal EV cells. Factorial Energy began trading on Nasdaq on Monday under the ticker FAC , giving one of the better-known U.S. solid-state battery developers a public-market test after years of technical validation with major automakers. The listing followed Factorial's business combination with Cartesian Growth Corp III, a SPAC transaction that is expected to provide roughly $110 million in gross proceeds for commercialization. FAC Nasdaq common-stock ticker after the Cartesian merger $110M Approximate gross proceeds for commercialization 745+ Miles reported in Mercedes-Benz real-world EQS testing AI-generated image Factorial is using the Nasdaq listing to fund the next stage of solid-state battery commercialization. A Public Listing Built on Automaker Validation Factorial is not entering public markets as a blank technical promise. The company has spent years building around its FEST platform, short for Factorial Electrolyte System Technology, and it has drawn backing or validation from Mercedes-Benz, Stellantis, Hyundai, and Kia. Those names matter because solid-state battery startups have often struggled to move beyond lab claims, sample cells, and investor decks. The attention-grabbing proof point came from Mercedes-Benz. In 2025, a modified EQS equipped with Factorial solid-state cells drove more than 1,200 kilometers , or about 745 miles , on a single charge in real-world testing. Mercedes said usable energy increased by about 25 percent while the pack stayed roughly comparable in size and weight to the standard EQS battery. The test did not make Factorial a volume supplier overnight, but it gave the company a rare public demonstration in an actual vehicle. Stellantis has also reported validation of Factorial's 77 Ah solid-state cells. The cells were described at 375 Wh/kg with more than 600 cycles in testing, and the automaker highlighted fast-charging potential from 10 percent to more than 90 percent in 18 minutes under lab conditions. Those figures still need the harsher proof of scale, cost, yield, and warranty life, but they explain why Factorial's listing is more interesting than a routine SPAC close. Why it matters: Solid-state batteries are shifting from chemistry claims toward financing, manufacturing, and customer-program execution. Factorial now has public investors watching whether its automaker validation can turn into commercial supply. What the SPAC Money Is Supposed to Fund The merged company is now Factorial Energy Inc., with Factorial Inc. operating as a subsidiary. Public reports tied to the transaction place the equity value around the low billion-dollar range, with the merger expected to deliver more than $100 million in gross proceeds through the SPAC structure and related financing. For a battery company, that is meaningful but not extravagant. It is not enough to build a global cell-manufacturing footprint by itself. That means the spending plan matters. Factorial says the capital will support commercialization of next-generation batteries for e-mobility, defense, aerospace, hyperscale data centers, robotics, and other power-hungry applications. The broad list is intentional. EVs remain the prize, but solid-state cells with high energy density can also appeal to drones, aviation-adjacent systems, military platforms, premium robotics, and critical backup power where weight, safety, and runtime carry high value. AI-generated image Solid-state battery commercialization depends on more than energy density. Cycle life, pressure management, safety, yield, and cost all need to work together. Commercialization also means narrowing the gap between a proven cell and a proven product. Lithium-metal solid-state designs can offer higher energy density because they replace the graphite anode used in conventional lithium-ion cells. The same shift creates practical problems. Interfaces must remain stable, lithium plating has to be controlled, pressure or volume changes need management, and factories must achieve usable yields at repeatable quality. These are manufacturing problems as much as chemistry problems. Why Automakers Still Care Despite Slower EV Growth Factorial's Nasdaq debut comes while several automakers are trimming near-term EV forecasts, delaying some programs, or leaning harder on hybrids. That sounds like bad timing until the solid-state value proposition is considered. If mass-market EV growth is more uneven, automakers need better batteries to improve the ownership experience, lower pack weight, reduce charging anxiety, and differentiate premium models. A conventional lithium-ion pack can already make excellent EVs. The issue is that range, weight, and charging speed still carry cost. A pack that provides more usable energy in a similar footprint gives designers options. They can extend range, reduce pack size, improve performance, or free up vehicle architecture space. In premium vehicles, where margins can absorb early technology cost, that may be enough to justify first launches before solid-state cells reach broad-market price points. AI-generated image Mercedes-Benz's long-distance EQS demonstration gave Factorial a public proof point outside the lab. The expected timing remains cautious. Factorial executives have pointed to possible EV use as soon as 2027, while Mercedes has discussed series-production ambitions later in the decade. Those statements leave room for limited programs, premium trims, or controlled deployments before full-volume manufacturing. The next two years should reveal whether Factorial can move from validation milestones into customer-qualified production. Nasdaq Does Not Remove the Manufacturing Test Battery markets have become less patient since the first SPAC wave. Investors have watched multiple electrification companies miss production targets, dilute shareholders, or abandon factory plans. Factorial's challenge is to avoid becoming another example of a good technical story overrun by manufacturing reality. The company has a clearer credibility base than many early-stage names because automakers have tested its cells. Still, public-market scrutiny will force more precise answers. How many cells can be produced per month? What is the yield? Which customer program is first? What form factor gets priority? How does the cost compare with high-nickel lithium-ion, LFP, and emerging LMFP cells? Can cycle life meet warranty needs in real vehicles? AI-generated image The hardest step for solid-state companies is often repeatable cell production, not a single impressive demonstration. There is also a competitive clock. QuantumScape, Solid Power, Samsung SDI, Toyota, CATL, and other players are pursuing different solid-state or semi-solid-state paths. Some are electrolyte suppliers. Some are cell makers. Some are using sulfide systems, some are leaning on oxide or polymer-based approaches, and some may commercialize hybrid designs before fully solid-state cells reach broad use. Factorial's FEST architecture will be judged not only against today's lithium-ion cells, but against rival next-generation chemistries arriving on similar timelines. Beyond EVs, High-Value Niches Could Come First Factorial's mention of aerospace, defense, robotics, and hyperscale data centers is not just investor-friendly breadth. These markets can tolerate higher early costs if the performance benefit is clear. A drone that flies longer, a robot that works an extra shift, or a critical-power system that stores more energy in less space can justify technology premiums that would be harder in a cost-sensitive entry EV. That path would also give Factorial more operating data before it faces the full warranty burden of mass-market vehicles. Smaller but demanding applications c