SK Signet has introduced a new 400kW All‑In‑One ultra‑fast EV charger that targets the growing demand for high‑power, high‑density charging infrastructure worldwide.
The charger combines power cabinets and dispensers into a single compact unit, which reduces installation complexity and civil‑construction costs at charging sites.
By integrating all components into one enclosure, SK Signet simplifies the deployment process and lowers ongoing operational overhead for network operators. This design is especially relevant as more automakers adopt 800V high‑voltage battery architectures, which require charging stations capable of stable 400kW output.
Hosting high‑power chargers in retail lots, gas stations, and urban parking areas becomes easier when equipment footprint is minimized. The new All‑In‑One model can supply 150–250kW to multiple vehicles while reserving full 400kW capacity for 800V EV platforms that need maximum charging speed.
Silicon Carbide Power Modules and Efficiency Gains
At the heart of the 400kW charger sits a silicon carbide (SiC)‑based high‑density power architecture that boosts conversion efficiency and thermal performance. The system uses multiple modular SiC‑based power modules, each optimized for ultra‑fast charging applications and capable of scaling up to 400kW.
This architecture allows the charger to reach up to 96.5% power‑conversion efficiency, which noticeably cuts energy loss during continuous high‑power sessions. For charging network operators, higher efficiency means lower electricity costs and better site‑level economics per kilowatt‑hour dispensed.
Improved thermal management further supports stable performance under heavy workloads, reducing the risk of derating or downtime. As electricity prices and grid‑capacity constraints grow, such high‑efficiency designs help operators comply with sustainability targets while maintaining profitability.
Modular, Scalable Deployment for Long‑Term Growth
The 400kW charger is built on a modular platform that lets operators scale power as demand and technology evolve over time. Network owners can initially configure the system at 320kW or 360kW and later expand to 400kW by adding more SiC‑based modules instead of replacing the entire unit.
This “pay‑as‑you‑grow” approach helps reduce upfront CAPEX while keeping infrastructure aligned with future high‑voltage EV models. Capacity can also be tailored to different locations, such as highway corridors versus urban hubs, depending on traffic patterns and grid capacity.
As EV battery capacities increase and charging‑station utilization rises, this flexibility becomes critical for efficient resource allocation. The 400kW rating also future‑proofs deployments against the next wave of large‑capacity EVs and fleet‑focused charging hubs.
Space‑Efficient Design and Urban Deployment
By fully integrating power conversion and control systems into a single unit, SK Signet has reduced the charger’s installation footprint by 54% versus its previous 400kW model. When compared with deploying two 200kW V2 All‑In‑One units to achieve the same 400kW output, the new 400kW system frees up more ground space for parking or other services.
This higher power‑density design is attractive for fuel retailers, shopping centers, and city parking operators who have limited available real estate. The compact form factor also shortens cable runs and electrical conduits, which further lowers installation and maintenance costs.
For operators in Europe and North America, smaller footprints ease planning‑permission hurdles and help integrate charging into existing petrol‑station layouts. Overall, the reduced size and simpler setup make this 400kW charger a practical choice for dense urban corridors and mixed‑use sites.
User Experience, Connectivity, and Global Rollout
From a user perspective, the new 400kW charger includes liquid‑cooled charging cables that are lighter and easier to handle during high‑power sessions. An ergonomic swing‑arm cable‑management system improves accessibility to charging ports on different vehicle types and positions.
The station supports both CCS1 and the North American Charging Standard (NACS), aligning with current and emerging connector trends in North America. Operators can choose from single‑ to quad‑cable configurations to match expected traffic and vehicle mix at each site.
A 32‑inch touchscreen display offers an intuitive interface, supports multiple payment methods, and enables custom branding and messaging for different operators. Liquid‑cooled cables, multi‑standard compatibility, and flexible connector options together enhance plug‑and‑play convenience and reduce failed charging attempts.
SK Signet has already begun initial production of the 400kW All‑In‑One charger in the United States and plans to expand into the European market by the end of 2026. In the long term, the company aims to supply this platform to global markets, building on its reputation as a leading provider of high‑power DC fast‑charging infrastructure.
As SK Group continues to invest in energy transition and EV‑related technologies, this 400kW ultra‑fast charger reinforces its strategy to power next‑generation mobility ecosystems worldwide.
