Overview
- Stellantis and battery startup Factorial have installed FEST semi‑solid cells in a Dodge Charger Daytona development vehicle and begun a North American road‑testing program to tune pack behavior and controls.
- Stellantis says engineers created a patented mechanical architecture and revised pack controls to fit FEST cells into its STLA Large platform and to meet automotive safety and durability needs.
- Factorial's 77Ah FEST cells were validated in the lab at about 375 Wh/kg, more than 600 cycles, 15% to 90% charging in 18 minutes, and operation from roughly -30°C to 45°C, according to company data.
- Stellantis announced the vehicle program on Thursday to collect real‑world data on charging behavior, thermal management and longevity that will guide further cell and pack development.
- Factorial recently completed a SPAC listing and raised roughly $110 million to support commercialization, and automakers including Mercedes‑Benz, Hyundai and Kia have run prior prototype tests that inform the path to scaled production.