Stellantis and Factorial Energy have successfully validated automotive-sized solid-state battery cells with an energy density of 375Wh/kg, fast-charging capability from 15% to 90% in just 18 minutes, and high discharge rates up to 4C.
The breakthrough FEST® technology is a major step toward integrating next-generation batteries into electric vehicles, with Stellantis planning a demonstration fleet by 2026.
The solid-state cells operate efficiently across a broad temperature range of -30°C to 45°C, thanks to Factorial’s advanced electrolyte formulation developed with AI tools.
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Unlike traditional lithium-ion batteries, these solid-state cells deliver higher energy density, improved safety, and faster charging—key benefits for EV performance and scalability.
The collaboration between Stellantis and Factorial also targets improved battery pack design, aiming to reduce weight and enhance vehicle efficiency, range, and affordability.
Backed by Stellantis’ $75 million investment in 2021, this validation milestone cements the partnership as a leader in commercializing solid-state battery technology.
Source: Stellantis and Factorial Energy Achieve Major Breakthrough in Solid-State Battery Development
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