Stellantis’ Solid-State Battery With 18-Minute Fast Charging Is Almost Ready

- Stellantis and Factorial have successfully validated automotive-sized solid-state battery cells.
- They have a 375 Wh/kg energy density and can go from a 15% to 90% charge in 18 minutes.
- Dodge Charger Daytona prototypes with solid-state batteries are coming by 2026.
Last fall, Stellantis and Factorial announced plans to put solid-state batteries into a fleet of Dodge Charger Daytonas by 2026. That development is inching closer today as the two companies have successfully validated automotive-sized solid-state battery cells with a 375 Wh/kg energy density.
While that’s Greek to most of us, the automaker said they validated 77Ah FEST (Factorial Electrolyte System Technology) cells over 600 cycles and are “progressing towards automotive qualification.” The latter is a “milestone” for large-format lithium-metal solid-state batteries.
More: Mercedes EQS Solid-State Prototype Hits The Street With 621 Miles Of Range
Besides having an impressive energy density, solid-state batteries allow for a significant reduction in charging time. In particular, at room temperature, they can go from a 15% to 90% charge in 18 minutes. The cells also promise to “deliver high power output with discharge rates up to 4C, supporting greater performance demands in electric vehicles.”
While work still needs to be done, Factorial’s latest electrolyte formula allows for operational temperatures between -22°F and 113°F (-30°C and 45°C). That’s a pretty wide range and would allow solid-state EVs to operate in all but the most extreme climates.

Stellantis Chief Engineering and Technology Officer, Ned Curic, remarked “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.”
His sentiments were echoed by Factorial Energy CEO Siyu Huang, who said “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. This achievement with Stellantis is bringing next-generation battery technology from research to reality.”
