SK Signet has launched a 400kW All-in-One ultra-fast EV charger built on silicon carbide (SiC) power modules. The South Korean manufacturer said the integrated unit delivers up to 96.5% power conversion efficiency. It also reduces the installation footprint by 54% compared to deploying two 200kW All-in-One units at equivalent capacity. The company has entered initial production at its U.S. facility and plans a European launch by year-end.
Highlights
- SiC-based power architecture achieves up to 96.5% conversion efficiency, reducing energy loss during high-power operation
- 54% smaller footprint than two V2 200kW units at equivalent 400kW output, improving power density per site
- Modular design allows operators to configure output at 320kW, 360kW, or 400kW and scale by adding modules
- Dual-standard support for both CCS1 and the North American Charging Standard (NACS)
SiC Architecture Targets Efficiency and Density
Growing adoption of 800V battery platforms across new EV models is driving demand for higher-output charging hardware. SK Signet’s response integrates power cabinets and dispensers into a single compact unit. This eliminates the split-type architecture used in its previous V2 distributed systems.
The charger uses multiple high-density SiC-based power modules. According to the company, the system achieves up to 96.5% power conversion efficiency. Improved thermal management supports stable output during continuous charging sessions. The unit can deliver 150–250kW to multiple vehicles simultaneously or the full 400kW to a single high-voltage EV.
SK Signet CEO Hyungki Cho said the model “simultaneously innovates power efficiency, density, and reliability.” He added that SK Signet would “spearhead the evolution of ultra-fast charging networks” as high-power demand grows in the U.S.
Modular Scalability Reduces Upfront Costs
The charger’s modular power architecture supports incremental capacity upgrades. Operators can start at 320kW and add power modules over time without replacing the full hardware unit. SK Signet described this as a “pay-as-you-grow” approach. It is designed to lower initial capital expenditure while keeping sites ready for future high-voltage, large-capacity EVs.
Additionally, the integrated All-in-One structure simplifies civil construction. The company said it reduces installation costs compared to distributed systems that require separate power cabinets and dispensers.
Compact Design for Space-Constrained Sites
The 54% footprint reduction is measured against deploying two V2 200kW All-in-One chargers to reach the same 400kW capacity. SK Signet said the single integrated unit delivers more power per square foot than its V2 600kW split-type chargers as well.
This compact form factor targets deployment at retail centers, gas stations, and urban parking facilities. For site hosts managing limited real estate, the smaller installation area could provide a meaningful operational advantage.
User and Operator Features
The charger includes several hardware and software enhancements:
- Liquid-cooled cables reduce cable weight while maintaining stable high-power delivery
- Swing arm cable management improves accessibility regardless of charging port location
- 32-inch touchscreen provides an outdoor-optimized user interface
- Flexible connector configurations from single to quad cables
- Multiple payment options including Plug & Charge, AutoCharge, credit card, and RFID
On the software side, SK Signet said the platform is optimized for faster response speeds, operational stability, and energy-efficient UI design. The interface is also customizable for different operator requirements.
Production and Global Expansion
SK Signet has completed development and entered initial production in the United States. The company operates a manufacturing facility in Plano, Texas, with capacity for more than 10,000 ultra-fast chargers annually.
A European market launch is planned by the end of 2026. The company’s longer-term strategy targets expanded supply to additional global markets. SK Signet is majority-owned by SK Inc., the strategic investment arm of SK Group.
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