Stellantis, Factorial's New Solid-State Cell Promises 460km+ Range, 18-Minute Charging, and High Power Output

Stellantis N.V. and Factorial Energy have announced a significant step forward in electric vehicle battery development, confirming the validation of Factorial’s automotive-sized FEST (Factorial Electrolyte System Technology) solid-state battery cells. The cells also achieve a major reduction in charging time, capable of charging from 15 percent to over 90 percent in just 18 minutes at room temperature. In terms of performance, the cells deliver a high discharge rate of up to 4C, enabling the power output needed for demanding electric vehicle (EV) operations.

Ned Curic, Chief Engineering and Technology Officer at Stellantis said, “This achievement puts us at the forefront of the solid-state revolution. We continue working with Factorial to push boundaries and deliver more advanced, lighter, and cost-efficient battery solutions.”

Factorial Energy developed a new electrolyte formulation using AI-driven tools, allowing the battery to operate reliably across a wide temperature range — from -30°C to 45°C. This advancement overcomes previous thermal limitations commonly associated with solid-state technology, making the batteries more viable for use in a variety of global climates.

"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. "Our collaboration with Stellantis is accelerating the path from research to real-world deployment."

The companies are also working together on battery pack design to optimize weight and system efficiency. Reductions in pack weight will directly contribute to improved EV range and lower overall vehicle costs, enhancing the sustainability and affordability of electric mobility.