Mercedes-Benz EQS Solid State Battery Hits Whopping 1,205 km in One Charge

Abu Dhabi: Mercedes-Benz has just lightly modified the EQS with a lithium-metal solid-state battery which was able to cover 1,205 kilometers on a single charge. This is proof that it has long-range potential for real roads.

• The test EQS drove 1,205 kilometers non-stop from Stuttgart to Malmö.
• The run beat the record of Vision EQXX and it finished with 137 km remaining.
• Solid-state cells gave about 25% more usable energy than current EQS packs.
• The plan from Mercedes is to enter series production of solid-state tech by the end of the decade.

Mercedes-Benz sent an EQS equipped with a lithium-metal solid-state battery on a real-world long-distance test to validate the data from labs on public highways.

The car ran across Germany, Denmark and Sweden through standard roads and highways, which went to prove that the technology works beyond controlled conditions. The result means real gains in range and energy efficiency that could reshape the long-distance travel of EVs.

The route and the result

The test included a drive along A7 and E20 routes without using any shortcuts or ferries. It used the car’s Electric Intelligence system to pick the most efficient path while it factored in traffic, terrain and weather.

The Mercedes-Benz EQS completed 1,205 kilometers on one charge and still had a calculated 137 kilometers left. That performance surpassed the record held by Vision EQXX by 3 kilometers and sent a clear signal that solid-state batteries can deliver in everyday use.

What makes the solid-state pack different

Solid-state cells are denser, no doubt; but they also change the needs for pack design and cooling. Some of the main advantages that were acknowledged in the test were:

• ~25% more usable energy than a standard EQS battery.
• Similar weight and size to current lithium-ion packs, helping avoid bulk.
• Pneumatic actuators that adjust to changes in cell volume for longevity.
• Passive cooling of airflow to cut weight while it maintains high efficiency.

These traits led to longer range without a large penalty in weight or space. It also led to simpler thermal systems that suit hot climates like the one in UAE.

Direct words from Mercedes

Markus Schäfer, who is the Chief Technology Officer of Mercedes-Benz said: “The solid-state battery has changed everything we thought we knew about electric mobility. We have shown, with the long-distance drive success of the EQS, that this technology delivers in the lab and also on the road. Our goal is to bring innovations like we have just done, into series production by the end of this particular decade.

Real-world validation and next steps

Mercedes developed the solid-state cells with Factorial Energy and systems tuned with Mercedes-AMG High Performance Powertrains.

The test shows simulations and lab work translating to performance on highway, readiness of charging, and reliability. Engineers emphasised that the car arrived with substantial remaining range, not merely reaching a limit, which is what matters for the confidence of consumers.

Why UAE drivers should care

Long range and robust thermal control are vital for drivers in the Emirates. Solid-state packs that bring more energy that can be usable and passive cooling means better performance in hot and desert conditions, reduced range anxiety on long trips, and may even cut charging stops on cross-emirate journeys.