The 2027 Mercedes-Benz EQS 450+ achieved a striking technical milestone in real-world range tests, managing to cover a distance of 539 miles (about 867 km) on a single charge without needing to stop for refueling. This performance, recorded by Edmunds in its tests, exceeds the U.S. Environmental Protection Agency (EPA) estimates which indicated a range of only up to 467 miles, placing the car at the forefront of the electric sedan category in terms of range.
Technical Updates in Battery and Electrical Architecture
The car relies in this development on fundamental updates that included a battery with a capacity of 122 kWh and an advanced electrical architecture operating at 800 volts. The superiority was not limited to the distance covered, but extended to energy consumption efficiency; the car recorded a consumption rate of 29.6 kWh per 100 miles, which is a better figure than the official EPA estimates which indicated 28 kWh per 100 miles. Compared to the 2025 model, we find a noticeable improvement, as the previous model covered only 464 miles and consumed 34 kWh per 100 miles.
A Leap in Charging Speed
Regarding charging technologies, the tests showed the car's ability to reach a peak charging of 350 kW, while maintaining an average charging rate of 222 kW throughout the session. This improvement in the electrical architecture allowed the car to add 825 miles of range in just one hour, and it can also add 100 miles within just 7 minutes, which represents approximately double the charging speed of the 2025 model.
What Does This Development Mean Practically?
This achievement represents a shift in how "range anxiety" is addressed among electric vehicle users, but it opens a door for discussion on the technical design philosophy between increasing battery size and improving efficiency:
- Efficiency vs. Size: The success of the EQS shows that improving the electrical architecture (800 volts) and reducing energy consumption per mile grants a longer range without necessarily needing much larger and heavier batteries.
- Meeting User Needs: Polls (such as the BMW study) indicate that most users do not actually need a range exceeding 75 miles for daily use, but they demand a long range as psychological insurance.
- Charging Speed as an Alternative to Range: With the improvement of fast charging technologies, the time spent at charging stations becomes a more decisive factor than the total battery capacity.
These results put Mercedes-Benz in direct competition with the Lucid Air, which was the first to break the 500-mile barrier, and with the Cadillac Escalade IQ, which tops the list with a range of 558 miles thanks to its massive battery reaching a capacity of 205 kWh.