Stellantis Puts Solid-State Battery in Dodge Charger Daytona for North America Road Tests

Stellantis has begun on-road testing of solid-state batteries in a Dodge Charger Daytona electric vehicle, marking what the company calls the first integration of solid-state cells into a Stellantis vehicle. The development car is equipped with Factorial's FEST (Factorial Electrolyte System Technology) cells, which deliver an energy density of 375 Wh/kg — substantially higher than the 200 to 300 Wh/kg typical of conventional lithium-ion batteries. In validation testing, the 77 Ah FEST cells demonstrated more than 600 charge cycles. Charging speed is another key advantage: the cells can recover from 15% to more than 90% state of charge in approximately 18 minutes. Stellantis completed the formal validation of Factorial's FEST cells in April 2025 before selecting the Dodge Charger Daytona as the first vehicle to carry the technology into real-world use. The Charger Daytona technology demonstrator is not a production model; Stellantis has not announced a launch timeline for a solid-state EV. Road testing in North America is widely seen as an important milestone in the broader commercialisation of solid-state battery technology in passenger cars.