On July 29, Dongfeng Motor Corporation introduced its first ultra-high-power electric vehicle charging system, capable of delivering 1,500 kilowatts through a single charging connector. The new charger uses silicon carbide semiconductor technology, the same material that powers some of the most advanced electric vehicles on the market. This brings Dongfeng into direct competition with major players like BYD and Contemporary Amperex Technology (CATL), who have previously led in the megawatt-class charging industry.
Dongfeng also announced the iD5-300SN, a kilovolt-architecture electric drive unit integral to the new charging technology. While the charger's specifications are impressive, the automaker has yet to produce a vehicle that can fully utilize the 1,500 kW capability. Until such a vehicle is available, the system's full potential remains untapped.
To achieve 1,500 kilowatts, a vehicle must operate at 1,000 volts and draw 1,500 amperes. However, most current electric vehicles, including Dongfeng's own models, are limited to 800 volts. This means an 800V vehicle can only pull up to 1,200 kilowatts from the charger. The limitation is not a flaw in the charger but a fundamental requirement based on electrical physics.
The new charger uses a split-cabinet design, featuring a main unit with a 1.2 megawatt capacity. Additional power cabinets can be connected to increase output to 2.4 megawatts or more. The dispenser — the part with the cable and charging gun — can handle up to 1,500 amperes and operates across a wide voltage range of 150 to 1,000 volts. This design allows compatibility with both legacy and next-generation electric vehicles, though the actual power delivered will vary depending on the vehicle's voltage capability.
Silicon carbide semiconductors are critical for ultra-high-voltage charging. Compared to traditional silicon transistors, silicon carbide can handle higher voltages, operate at higher temperatures, and switch at higher frequencies. Dongfeng's iD5-300SN drive unit incorporates a 1,500-volt-rated silicon carbide power module, enabling it to deliver 300 kilowatts and operate across a voltage range of 450 to 1,000 volts.
Dongfeng claims the iD5-300SN offers a 30 percent increase in power density over its predecessor and achieves high efficiency under the Chinese CLTC test cycle. These claims are based on internal data and not independently verified. The unit works with current 800V platforms and can be adapted for future 1,200V systems, making it a key technology as the industry moves toward higher voltage standards.
The new drive unit and charger include a boost-charging function that repurposes existing motor windings as inductors. This eliminates the need for additional hardware modifications, making it a cost-effective solution for integrating the new charging technology into existing infrastructure. The approach reduces adoption costs and simplifies the transition to next-generation charging systems.
The charger can simultaneously charge two electric vehicles, dividing the available power between two connectors when both are in use. This dual-connector design enhances the efficiency of public and private charging stations by reducing the need for multiple units. The system achieves at least 96.7 percent energy efficiency, making it one of the first products to meet Level 1 of China’s GB 46519-2025 energy-efficiency standard for high-power charging equipment.
Why Voltage Matters in the Future of EV Charging
The need for 1,000 volts is based on Ohm’s law, where power is equal to voltage multiplied by current (P = V × I). To reach 1,500 kilowatts, a vehicle must operate at 1,000 volts and draw 1,500 amperes. An 800V vehicle at the same current can only achieve 1.2 megawatts. The gap is not due to limitations in the cable or charger but the voltage capacity of the vehicle's battery pack.
To fully utilize the 1,500 kW capability, a vehicle must have battery chemistry that can accept such high charge rates. This is measured as a C-rate, where 10C means the battery can be charged at ten times its nominal capacity per hour. Such high C-rates are rare and require significant advancements in battery design and thermal management to prevent overheating and degradation.
Dongfeng’s use of silicon carbide allows it to push the boundaries in electric vehicle charging. Industry data shows that silicon carbide MOSFETs offer efficiency gains of around 3 to 5 percent compared to traditional silicon IGBTs. These improvements result in smaller and lighter cooling systems and more compact hardware designs, making kilovolt-level charging commercially feasible.
The iD5-300SN's 1,500-volt-rated silicon carbide power module is a key enabler of its performance. Unlike traditional silicon transistors, which face significant manufacturing challenges when operating above 1,000 volts, silicon carbide devices rated for 1,500 volts and beyond are in mass production from manufacturers like STMicroelectronics, Infineon, and onsemi. This gives Dongfeng a competitive edge in deploying high-voltage charging solutions.
While the iD5-300SN is forward-looking, it is also compatible with current 800V platforms. The unit is designed to evolve alongside industry changes and supports new voltage standards. The boost-charging feature further enhances compatibility by enabling integration with existing infrastructure without costly upgrades.
As the electric vehicle market matures, the demand for ultra-fast charging will increase. Dongfeng’s new charger and drive unit represent a significant step forward, combining silicon carbide technology with a flexible, efficient, and scalable design. While the company still needs to develop a vehicle to make full use of these advancements, the foundation has been laid for a new era of high-power charging.