Ultra-fast charging for depots and commercial fleets — no trenching, no utility upgrade, no 12-to-18-month wait. The 400squared stores energy on site and delivers it the moment your vehicles need it.
DC Output Voltage
Connector Types
High-utilization fleets need fast, predictable turnaround. The grid wasn’t built to deliver that at the edge — where the vehicles actually are. The 400squared combines on-site battery storage, ultra-fast charging, and AI-driven energy management, so charging speed no longer depends on what the local grid can give you.
No trenching. No utility upgrade. Plug into your existing low-voltage connection and run.
A conventional 400 kW charger needs a grid connection most sites don’t have. The 400squared pulls as little as ~30 kW and still delivers up to 400 kW, because the energy is already stored on site. That means depots, yards, and remote sites that can’t host traditional fast charging can host this — on the connection they already have.
by the numbers
Total Available Energy Storage Capacity
Peak Maximum Continuous Output Power
Average Time from Order to Commissioning
Installation time
What that means for your operation:
Tested under desert heat, limited grid access, and demanding duty cycles, the 400squared delivers where reliability matters most.
Port uptime
Installation time
Average energy delivered per session
38 kWh
Charge in 10 minutes
Up to 50%
Validated at the Hyundai California Proving Ground and stress-tested across extreme field conditions.
Every unit runs on the same software stack: Stargazer decides when energy moves, Reef shows you everything that happens.
Stargazer®
AI energy optimization
Stargazer learns how your fleet actually charges — which vehicles plug in when, and how much energy each shift really needs — and schedules around it. Energy goes into the battery when power is cheapest, stays there through demand-charge windows, and a reserve is held back for outages before they hit.
Reef® Platform
Remote monitoring & operations
Comprehensive monitoring and diagnostics platform providing real-time insights and predictive maintenance capabilities.
Fleet Operations
High-throughput charging for commercial vehicle fleets with minimal downtime.
Critical Infrastructure
Backup power and charging for essential services and emergency operations.
Bring ultra-fast charging to sites the grid said no to.
Talk to our team to get started.