Dodge Charger Daytona EV: Factorial Semi-Solid-State Battery Upgrade

Stellantis has confirmed that it will integrate Factorial’s quasi–solid-state battery technology into its high-performance Dodge Charger Daytona EV. A demonstration fleet of vehicles using the new battery will be on the road starting in 2026. The company says the battery is lighter, safer, and has a significantly higher energy density than current liquid-anode lithium-ion batteries, promising improved overall performance, extended driving range, and reduced charging times.

FEST battery on Charger Daytona EV: focus on energy density

In prototype Charger Daytona EVs, Factorial’s solid-state batteries achieved an energy density of more than 390 Wh/kg, far exceeding the 200–300 Wh/kg of commercial lithium-ion batteries. This is an important difference toward the goal of reducing weight, increasing energy storage, and improving operational safety.

Stellantis says integrating the FEST battery into the STLA Large platform will increase the vehicle’s overall performance, improve range, and reduce charging times. CTO Ned Curic called the move “a significant milestone” in the collaboration with Factorial.

Roadmap: Demonstration fleet from 2026

The demonstration fleet of semi-solid-state battery cars is expected to be operational by 2026, marking a practical step toward commercializing the technology that has been anticipated for more than a decade. Stellantis has not yet announced the number of cars in the lineup, nor when consumers will be able to buy cars equipped with solid-state batteries.

Supply chain and costs: upgrading existing lines

The FEST (Factory Electrolyte System Technology) technology is designed to fit into existing lithium-ion battery production lines, reducing the need for new factories and potentially reducing the time and cost of expanding production. Factorial operates a large-scale solid-state battery production line in the US, located in Methuen, Massachusetts, with a completed capacity of 200 MWh per year.

The expansion problem: a big but well-founded challenge

The key challenge with solid-state batteries is how quickly they can scale up. Factorial’s approach, which involves upgrading its lithium-ion lines rather than building new plants from scratch, is expected to solve the problem of scale faster. Stellantis, along with Mercedes-Benz and Hyundai Motor Group, has poured hundreds of millions of dollars into Factorial, demonstrating its commitment to solid-state as the next big leap in electric vehicles.

Spreadability on STLA Large system

The STLA Large platform is being used by Jeep, Alfa Romeo, Chrysler, and Maserati. If production ramps up on schedule, solid-state battery EVs from these brands could soon appear, expanding the range of FEST technology applications in the Stellantis ecosystem.

Key information released

Category	Detail
Applicable vehicle models	Dodge Charger Daytona EV (demonstration fleet)
Battery technology	Factorial's FEST quasi–solid-state battery
Energy density	More than 390 Wh/kg
Compare references	Commercial lithium-ion batteries are about 200–300 Wh/kg
Rolling time	Demonstration fleet expected in 2026
Vehicle platform	STLA Large
Production capacity	Methuen, Massachusetts plant; completed capacity of 200 MWh/year
Production orientation	Possibility of installation on existing lithium-ion lines
Investors in Factorial	Stellantis, Mercedes-Benz, Hyundai Motor Group
Commercial status	The number of demonstration cars and the time of sale have not been announced.

Conclude

The inclusion of Factorial’s semi-solid-state battery in the Charger Daytona EV lays a significant foundation for the goal of improving performance, range, and charging time. By leveraging its existing lithium-ion line and expanding manufacturing capacity in the US, Stellantis is taking a substantial step toward commercializing solid-state batteries. Once the scale-up is on track, the technology could quickly spread to other EVs based on the STLA Large platform.