Mercedes EQS prototype drives 1,205 km on one charge with solid-state battery
Mercedes-Benz tested a prototype EQS with a solid-state battery that drove 749 miles (1,205 km) across Europe on a single charge. The run ties the record set by the Lucid Air but marks a major milestone for solid-state technology, which could transform EV range and reliability in the coming decade.
New Delhi: Mercedes-Benz has pushed its electric car ambitions further with a road test that stunned even seasoned automobile watchers. A lightly modified EQS prototype fitted with a solid-state battery covered 749 miles, or about 1,205 km, on a single charge during testing in Europe last month. The car drove from Stuttgart in Germany to Malmö in Sweden, and what’s even more striking, it still had 85 miles (137 km) of range left when it reached the destination.
We’ve followed EV stories for years, and honestly, crossing three countries on one charge still feels like science fiction. For perspective, most high-end EVs today manage around 400–600 km on a full charge. Hitting over 1,200 km puts the EQS in a different league altogether, especially with solid-state batteries under the hood.
A record tied with Lucid Air
The drive ties the Guinness World Record of 749 miles set earlier in July by the Lucid Air Grand Touring. The Lucid achieved the feat using a traditional lithium-ion battery, while the Mercedes used a solid-state pack. Solid-state technology is seen as the holy grail in EVs, promising higher energy density, longer life, and safer operation compared to current batteries.
Inside the long-distance test
Mercedes said the EQS was part of its validation programme for solid-state batteries. The route was planned using its in-house Electric Intelligence system, which calculates paths based on traffic, road gradient, temperature, and energy needed for climate control. The trip avoided ferries and stayed strictly on land.
For enthusiasts, here’s the detail that matters: the battery was developed with U.S.-based Factorial Energy, and Mercedes-AMG High Performance Powertrains contributed with technology that traces back to Formula 1. That link to motorsport is no surprise, since the racing world has always been the testbed for pushing materials and energy systems.
Why this matters for the EV market
If solid-state packs make it to production cars, we could see ranges that put even diesel sedans to shame. Right now, India’s most popular EVs like the Tata Nexon EV or MG ZS EV max out below 500 km on a charge. Imagine driving from Delhi to Mumbai, roughly 1,400 km, with only one charging stop in between. That’s the kind of leap this test hints at.
The company’s chief technology officer Markus Schäfer described the breakthrough as a gamechanger for electric mobility, noting that the goal is to take this technology from testing grounds to production models by the end of the decade.
What next?
Mercedes plans more testing across climate zones and different terrains before moving towards production. The EQS is already among the most luxurious EVs globally, but this prototype shows where battery innovation could take the next generation of electric cars.