First US road tests for Dodge Charger fitted with solid-state batteries

Stellantis, the global automotive group behind brands like Dodge, Chrysler, and Fiat, has achieved a significant milestone in electric vehicle (EV) technology by fitting a solid-state battery pack into a Dodge Charger for on-road testing in North America. This marks the first time such a battery has been integrated into a production-spec vehicle for real-world evaluation in the region, following similar tests conducted by BMW and Mercedes in Europe. The partnership between Stellantis and Factorial Energy focuses on developing a semi-solid electrolyte system, combining a solid matrix infused with a liquid or gel-like electrolyte. Factorial’s FEST (Factorial Electrolyte System Technology) claims to deliver an energy density of 375 watt-hours per kilogram—nearly double current EV batteries—alongside rapid charging (15% to 90% in 18 minutes) and operational reliability from -30°C to 45°C. The integration required advanced engineering, including a new mechanical architecture and reworked control systems to adapt the existing battery pack. Stellantis has historically been cautious about tech innovation but is now positioning itself as a leader in solid-state battery development. The company’s decision to test the technology in a Dodge Charger underscores its commitment to practical application, despite the challenges of fitting the cells into a production vehicle. Factorial’s semi-solid approach aims to balance thermal stability, reduced flammability, and smoother ionic conductivity compared to traditional liquid electrolytes. While competitors like Honda, MG, and European automakers have also pursued solid-state solutions, Stellantis’ North American road tests mark a key step toward commercialization. The collaboration highlights the race among manufacturers to deliver the first production-ready solid-state EV, with Factorial’s technology offering potential advantages in performance, safety, and efficiency. Stellantis has not yet disclosed the duration or specific tests for the Charger trials, but the move signals progress toward integrating the battery into future production models.