Overview
The Klitv 320–400 kW ultra-fast charger is engineered for the most demanding EV charging applications: logistics fleet depots where commercial vehicles need rapid partial charges between shifts, bus and coach terminals requiring high-power overnight top-ups, and public ultra-fast hubs serving drivers who cannot afford to wait longer than 10–15 minutes.
At 400 kW, the unit delivers approximately 200 km of range in under 10 minutes for passenger vehicles and light commercial vehicles with compatible fast-charge systems. For medium commercial vehicles with larger batteries and higher charge acceptance rates, the same 400 kW output provides the fastest available terrestrial charging solution below megawatt-level infrastructure.
Triple Safety Protection Architecture
The defining engineering feature of the 320–400 kW unit is what we call the triple safety protection architecture — a three-layer active fault detection and response system designed for the higher electrical risks associated with very high-power DC output:
Layer 1: Pre-Connection Safety
- Insulation monitoring on both AC input and DC output circuits before any connection is made
- Gun-head temperature monitoring detects thermal abnormalities in the connector before charging begins
- Connection detection confirms correct vehicle connector engagement via pilot signal verification
Layer 2: Active Charging Protection
- Real-time current monitoring with millisecond-level overcurrent cutoff
- Anti-reverse-flow protection prevents current flowing from vehicle battery to charger
- Contactor adhesion detection monitors for mechanical relay sticking (a critical fault mode at high power)
- Door-opening protection immediately cuts output if the enclosure is opened during operation
Layer 3: System-Level Protection
- Emergency stop button accessible from both sides of the 1030 mm-wide cabinet
- Overtemperature shutdown with temperature hysteresis to prevent rapid cycling
- Overvoltage and undervoltage protection on both AC input and DC output
This three-layer architecture is the reason the 320–400 kW platform carries the same IP54 protection rating and IEC 61851 certification as our lower-power units — the additional safety complexity has been absorbed into the core design rather than added as aftermarket modifications.
Logistics Fleet Application
For a logistics park charging operation serving 100+ electric delivery vans or medium trucks, the 320–400 kW unit addresses a constraint that lower-power chargers cannot: the “shift change window.”
At a fleet depot where vehicles return from delivery routes and need to be recharged before the next shift (typically a 45–90 minute turnaround), conventional 60–80 kW DC chargers can deliver only 45–120 kWh in that window — often insufficient for a full recharge from the return state of charge. The 320–400 kW unit delivers 240–600 kWh in the same 45-minute window, making full or near-full recharging feasible within operational constraints.
A well-designed depot charging system for 100 BEV commercial vehicles might combine:
- 20× 320–400 kW ultra-fast units for priority vehicle fast turnaround
- 80× 7–22 kW AC units for overnight charging of lower-priority vehicles
- OCPP CMS with fleet management integration scheduling charge priority automatically
Technical Notes
Auxiliary Power Supply
The 320–400 kW unit uses a DC 12V/24V switchable auxiliary supply (vs. fixed 12V in lower-power units). The 24V option supports longer cable runs in large depot installations without voltage drop issues on the auxiliary control circuit.
Cabinet Dimensions
The 1030 × 980 × 2080 mm cabinet is significantly larger than the 750 × 500 × 1850 mm 60–180 kW units. Site planning should account for the larger footprint, access space for cable entry from the base, and clearance for the forced-air cooling exhaust at the top.
