How the Mercedes-Benz EQXX Achieved 1,000km on a Single Charge: Efficiency Redefined

One of the main criticisms electric vehicles (EVs) face is their limited range and slower recharge times compared to internal combustion engine (ICE) vehicles. The root cause is simple: EV batteries store far less energy than a typical fuel tank.

There are generally two ways to improve a car’s range. The first is increasing energy capacity. This is easy and cost-effective for ICE vehicles, but significantly more challenging and expensive for EVs. The second option is optimizing every aspect of the vehicle—its aerodynamics, rolling resistance, and weight.

The Mercedes-Benz Vision EQXX set a new benchmark by driving 1,008 km on a single charge, achieving an ultra-low energy consumption of 8.7 kWh/100 km at an average speed of 87 km/h. Let’s explore the groundbreaking innovations that made this possible.

Aerodynamics: Cd 0.17 – Record-Breaking Drag Efficiency

Aerodynamic drag is the main consumer of energy at highway speeds. The EQXX has a drag coefficient (Cd) of just 0.17 and a frontal area of 2.12 m², giving it a total drag area of only 0.36 m². That’s 39% lower than the already-efficient EQS (0.5 m²).

Key aerodynamic features include:

Teardrop body shape

Tapered rear end (50mm narrower)

Active and passive aero elements

On-demand aero cooling

Fully covered 20-inch wheels

At 130 km/h, the EQXX requires only 14 PS to overcome air resistance—an extraordinarily low figure.

Powertrain: 95% Efficiency from Battery to Wheels

Mercedes-Benz claims a 95% drivetrain efficiency, meaning only 5% of energy is lost between battery and wheels. To achieve this, each component—motor, power electronics, and gearbox—must exceed 98% efficiency.

The EQXX likely uses a permanent magnet synchronous motor. With low cooling needs, it employs on-demand liquid and air cooling to cut down on parasitic drag.

Max Power: 180 kW (245 PS)

Estimated Torque: ~400 Nm

Lightweight Bodywork: Smart Materials Meet Bionic Design

The EQXX weighs just 1,755 kg, an impressive feat considering its 100 kWh battery alone weighs around 500 kg.

Lightweight materials used:

Aluminum, martensitic steel, and carbon fiber reinforced plastic

Forged magnesium wheels for reduced unsprung mass

Aluminum brake discs – lighter than traditional steel discs

Bionic design principles ensured materials were only used where necessary, maximizing strength while minimizing weight.

Energy-Saving Innovations: Solar Power and Interior Materials

Solar Roof Panels: Adds up to 25 km of range on a sunny day by powering infotainment, HVAC, and lights.

Sustainable Interior Materials: Lightweight, eco-friendly, and designed for minimal resource use.

High-Voltage Battery: Lightweight, Compact, and High Energy Density

The 100 kWh battery uses:

Cell-to-pack architecture (no modules)

Air cooling system

Carbon fiber top cover

Specs:

30% lighter and 50% smaller than the EQS battery

>900V electrical architecture for high-efficiency charging

High-silicon anode for 200 Wh/kg energy density—a record for high-voltage EV batteries

Conclusion: A Glimpse Into the Future of Electric Vehicles

Though the EQXX is a concept, its cutting-edge technology could soon trickle down into production Mercedes-Benz EVs. From advanced aerodynamics and ultra-efficient powertrains to revolutionary batteries, the EQXX proves that electric cars can travel further, charge faster, and be more sustainable—all at once.