SK Signet just unveiled a new 400 kW ultra-fast EV charger aimed squarely at the next wave of high-voltage EVs – and it’s built to take up a lot less space.
The South Korea-based charging manufacturer, part of SK Group, says its new “All-in-One” unit combines the power cabinet and dispenser into a single system, cutting the installation footprint by more than half compared to its previous setup at the same power level. That matters for charging sites where space is tight, like gas stations and urban parking lots.
More EVs are rolling out with 800V battery architectures that can take advantage of higher charging speeds. That’s pushing site hosts and charging networks to look for hardware that can deliver more power without making installations more complicated or expensive.
SK Signet’s new charger is designed to do both.
One box, less space, lower install complexity
According to SK Signet, integrating everything into a single compact system reduces the installation footprint by about 54% compared to using two 200 kW units to reach the same output.
That smaller footprint also means less on-site construction, which can lower installation costs and make it easier to deploy chargers in dense areas.
Built for both today’s EVs and what’s coming next
The charger can deliver up to 400 kW for EVs that can accept it, while also supporting simultaneous charging of 150–250 kW for multiple vehicles.
At the core are silicon carbide (SiC)-based power modules designed to handle high power with less energy loss. SK Signet says the system reaches up to 96.5% power conversion efficiency and includes improved thermal management to maintain stable performance during continuous use.
For operators, that translates to less wasted electricity and better overall site economics.
Modular design aims to cut upfront costs
The system uses a modular architecture, so operators don’t have to install the full 400 kW from day one. Power can be configured at 320 kW, 360 kW, or 400 kW, and additional modules can be added later as demand grows.
That “pay-as-you-grow” approach lowers upfront capital costs and lets charging sites scale without replacing the entire unit.
Designed for real-world use
SK Signet is also focusing on usability and flexibility at the site level.
The charger supports both CCS1 and NACS connectors, with configurations ranging from single to quad cables. It also includes liquid-cooled cables to keep weight down while maintaining high power delivery, along with a swing-arm cable system to make plugging in easier, regardless of where a vehicle’s charge port is located.
A 32-inch touchscreen provides the user interface, and the system supports multiple payment options, including Plug & Charge, AutoCharge, credit cards, and RFID.
On the software side, SK Signet says it has optimized the platform for faster response times, improved stability, and better security, along with a customizable interface for different operators.
Made in the US, global rollout next
SK Signet says it has finished developing the charger and has already begun initial production in the US. The company plans to expand into Europe by the end of the year and scale globally over time.
With ultra-fast charging demand ramping up alongside higher-voltage EVs, compact, high-power systems like this are likely to become the new baseline for public charging infrastructure.
Read more: An astounding number of DC fast chargers came online in 2025
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