rewrite this title The Mercedes-Benz EQS achieved a range of 1,205 km with a solid-state battery.

A modified Mercedes-Benz EQS equipped with a solid-state battery has achieved a range of 1,205 km on a single charge. The journey, which went from Stuttgart to Malmö, left the car with an additional 137 km of range remaining.

Mercedes-Benz conducted a significant test that sheds light on the future of electric mobility. A modified EQS, fitted with a solid-state battery, completed the 1,205-kilometer trip from Stuttgart to Malmö on a single charge. This drive, which took place at the end of August, proved that the new battery technology can work reliably not just in a laboratory setting, but also under real-world road conditions.

The era of solid-state batteries is very near.

The result surpassed the brand’s previous record. The 1,202-kilometer distance covered by the Vision EQXX from Stuttgart to Silverstone was beaten by three kilometers. Upon arriving in Malmö, the EQS still had 137 kilometers of range left, which means the total potential range was 1,432 kilometers.

Mercedes-Benz had planned this journey as part of a comprehensive testing program announced in February. The EQS departed from Stuttgart and traveled through German and Danish highways to reach Sweden. The electric navigation system factored in road gradients, traffic, temperature, and heating/cooling needs when determining the route.

The company, which aims to test the performance of solid-state battery technology in various climates and on long routes, continues its validation work in daily-use scenarios, in addition to laboratory and simulation tests.

The battery system was developed in collaboration with Mercedes-AMG High Performance Powertrains (HPP) and the American cell manufacturer Factorial Energy. The cells used are based on a technology the company calls FEST (Factorial Electrolyte System Technology).

In this new system, pneumatic actuators are used to compensate for the typical volume changes that the battery experiences during charging and discharging. This keeps the cells under the necessary pressure, ensuring performance stability. Furthermore, while the battery capacity has been increased by 25%, its size and weight remain almost the same as a standard EQS battery. Additionally, passive airflow cooling contributes to its energy efficiency.

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