Mercedes EQS Covers 1,205 km Without Charging on Solid-State Battery

Mercedes-Benz EQS completes 1,205 km trip from Stuttgart to Malmö on one charge with a solid-state battery, proving real-world range and future potential.

Mercedes-Benz has taken a significant step forward in electric mobility with a striking real-world test of its EQS sedan equipped with a solid-state battery. At the end of August 2025, the vehicle covered 1,205 kilometers from Stuttgart, Germany, to Malmö, Sweden, without a single charging stop and arrived with 137 kilometers of range still remaining. The route followed highways A7 and E20 through Germany and Denmark, and was optimized using the Electric Intelligence system, which factored in topography, traffic, and ambient temperature.

This achievement is part of a comprehensive validation program launched in February 2025. Alongside digital simulations and rigorous bench tests at Mercedes-Benz facilities in Stuttgart and Sindelfingen, the company is conducting road trials under real-world conditions to evaluate battery performance across climate zones and route profiles.

The key feature of the test vehicle is its lithium-metal solid-state battery, co-developed with Mercedes-AMG High Performance Powertrains and U.S.-based Factorial Energy, known for its FEST® technology. Mercedes reports a 25% increase in usable energy content compared to the standard EQS pack, while maintaining comparable size and weight, as well as passive air cooling. To ensure long-term stability, the battery is equipped with pneumatic actuators that compensate for cell volume changes during charging and discharging.

This drive was more than a technological showcase — it also surpassed the previous record set by the Vision EQXX concept by three kilometers. Mercedes-Benz has made clear its ambition to bring this innovation to series production by the end of the decade, potentially reshaping the electric vehicle market. Given the pace of testing and partnerships with key cell manufacturers, industry watchers expect that the first commercial models with solid-state batteries could arrive within the next few years.