HOWO TX EV 6×4 400 kWh Electric Tractor

The HOWO TX EV 6×4 400 kWh Electric Tractor Truck is developed on SINOTRUK’s new-generation clean-energy vehicle platform, designed to meet the demands of interprovincial logistics, port-connected freight transportation and long-haul operations.

The vehicle features a high-power electric drivetrain, efficient energy recovery, a 400 kWh lithium iron phosphate (LFP) battery pack and a purpose-built chassis. These technologies are engineered to deliver three key advantages: high reliability, strong operating performance and optimized operating costs.

Exterior Design of the HOWO TX EV 6×4 400 kWh Electric Tractor Truck

The HOWO TX EV 6×4 400 kWh Electric Tractor Truck features a distinctive “starry night” grille design, complemented by optimized aerodynamic lines that reduce air resistance, improve energy efficiency and help extend driving range.

The TGS cab features an ultra-high-strength cage-frame structure and is described as the only cab in China to have passed all three European ECE R29 cab crash tests. Combined with SINOTRUK’s proprietary cab-rearward displacement technology in the event of a collision, this structural design enhances driver protection and meets demanding international standards for active and passive safety.

The lighting system features high-intensity LED headlights, while the exterior equipment includes electrically heated rear-view mirrors, a panoramic four-direction camera monitoring system and an enlarged passenger-side observation window.

Interior Comfort and Convenience

The TX-U flat-floor cab provides a spacious and practical living environment for drivers on long-haul journeys.

The dashboard has been lowered by 50 mm to expand the forward field of vision and reduce blind spots directly in front of the vehicle.

The cab is equipped with a 900 mm-wide sleeper berth, a 10.1-inch smart display, a multifunction steering wheel with 14 integrated control buttons, a 60 W fast-charging port and a fast-cooling air-conditioning system.

These features are designed to support driver comfort, vehicle control and convenient access to essential amenities during long-distance transportation.

Electric Drivetrain and Battery Technology

High-Power Electric Motor

The vehicle is equipped with a high-power permanent magnet synchronous motor rated at 520 kW, delivering a maximum torque of up to 3,000 N·m.

This powertrain generates substantial traction from low speeds, supporting smooth starts and confident hill climbing. Its real-world power performance is comparable to that of a diesel tractor truck rated at 700 hp.

6-Speed AMT Transmission

The HOWO TX EV 6×4 400 kWh uses SINOTRUK’s proprietary 6-speed automated manual transmission (AMT), rather than the 4-speed configuration commonly found in conventional electric trucks.

The six-speed transmission optimizes traction distribution, enables smoother gear changes and reduces shifting jolts, allowing the vehicle to adapt more effectively to a wide range of road and operating conditions.

Energy Recovery System

The vehicle features a “6-in-1” electronic control system that integrates electromagnetic braking technology with regenerative energy conversion, offering five adjustable levels of energy recovery.

The maximum energy recovery efficiency reaches 94.5%. The intelligent control system optimizes operating parameters for different driving scenarios, helping improve energy utilization and manage operating costs.

SINOTRUK 400 kWh Lithium Iron Phosphate Battery

The truck is powered by a 400 kWh lithium iron phosphate (LFP) battery pack, with vibration and shock resistance enhanced by 130% to protect battery cells when operating on rough roads.

The battery thermal management system uses a dual-direction cooling design from the top and bottom, combined with high-thermal-conductivity materials arranged in a cross-layer configuration. This structure expands heat-transfer pathways from the electrode core to the entire battery pack.

With a heat-dissipation volume of approximately 4.3 m³, the system is designed to double heat-dissipation efficiency and help maintain stable battery operation.

Chassis and Frame System

The chassis is constructed from high-strength steel, increasing overall chassis reliability by 30% to meet the demands of different load conditions and operating environments.

The vehicle features SINOTRUK’s proprietary NS-07 suspension system, together with a front axle rated at 7.1 tonnes and a rear axle assembly with a load capacity of up to 13 tonnes.

The axle and suspension configurations are designed to meet load-bearing requirements while optimizing tire contact angles, helping reduce uneven tire wear and lower maintenance costs throughout the vehicle’s service life.

Additional Features of the HOWO TX EV 6×4 400 kWh Electric Tractor Truck

Modular Construction for Durability and Ease of Maintenance

The modular chassis design reduces the number of components by 40%, simplifying repair and maintenance procedures.

High-voltage and low-voltage pipelines and cable harnesses are routed separately. High-voltage components meet the IP68 ingress protection rating for resistance to water and dust, providing enhanced protection for the electrical system under varying operating conditions.

The vehicle has also undergone testing in demanding environments, including high-altitude mountainous regions, freezing conditions and extreme heat, to evaluate its operating performance and durability.

Intelligent Electro-Hydraulic Power Steering

The electro-hydraulic power steering system automatically adjusts steering assistance according to vehicle speed, providing responsive and flexible steering control under different operating conditions.

In the event of a sudden loss of traction power, the system continues to provide sufficient emergency steering assistance, helping the driver maintain directional control.

The wiring harness has been upgraded with a two-stage protective structure. All wiring is enclosed in corrugated protective conduit to improve resistance to stone impacts and minimize the risk of damage during long-term operation.