Liquid-Cooled DC Fast Charger for High-Demand Fleet Charging
High-current DC charging for fleet depots, electric trucks, buses and high-utilisation charging sites where shorter turnaround times and demanding charging schedules require more from the charging cable.
What Is a Liquid-Cooled DC Fast Charger?
A liquid-cooled DC fast charger uses a charging cable with an internal cooling circuit to manage heat generated during high-current charging.
As DC charging current increases, cable temperature becomes an increasingly important design consideration. Liquid cooling allows higher current to be delivered while keeping the cable practical for everyday vehicle connection.
For fleet operators, this becomes particularly relevant where electric trucks, buses or other high-utilisation vehicles need to recover substantial energy during limited charging windows.
Air-Cooled vs Liquid-Cooled DC Charging
Both cable types have a place in commercial charging. The right choice depends on charging current, vehicle demand and how intensively the equipment will be used.
A Practical Choice for Moderate Current
Air-cooled charging cables can support many commercial DC charging applications where vehicle demand and charging windows do not require the highest available current.
Higher Current for Demanding Charging Windows
Liquid-cooled charging is designed for applications where greater current is required while maintaining a manageable cable for repeated commercial use.
When Does Liquid-Cooled Charging Matter?
Liquid cooling becomes more valuable as charging current, vehicle energy requirements and commercial utilisation increase.
Electric Truck Fleets
Large batteries and demanding route schedules can make higher-current DC charging valuable when eHGVs have limited time to recover energy.
Bus Depot Charging
High-current charging can support buses that need substantial energy recovery between service periods or within shorter operational windows.
High-Utilisation Depots
Fleet sites with repeated charging sessions and short vehicle turnaround periods can benefit from charging equipment designed around demanding commercial use.
Why Charging Current Matters
DC charger power depends on both voltage and current. For vehicles capable of accepting high current, a liquid-cooled 600A cable can help the charging system deliver greater DC power within the vehicle's supported operating range.
That does not mean every vehicle will draw 600A. Real charging current is controlled by the vehicle, battery state and charging conditions throughout the session.
What Determines the Current a Vehicle Actually Takes?
A 600A charging cable provides capability, not a guaranteed continuous charging rate. The vehicle remains a major part of the charging equation.
Vehicle Charging Limit
The EV determines how much voltage and current it can accept at each stage of the charging session.
Battery State of Charge
Charging current usually changes as battery state of charge rises, rather than remaining at the maximum level throughout the entire session.
Battery Temperature
Vehicle battery management may reduce charging current when battery temperature or other operating conditions require it.
Available Charger & Site Power
The charger configuration and available electrical capacity must also be capable of supporting the requested vehicle charging power.
High Current Matters Most When Time Is Limited
The commercial value of liquid-cooled charging is not simply having a larger current number on the charger.
It becomes useful when compatible vehicles need to recover more energy during a limited depot dwell time, driver break or operational turnaround window.
For fleet operators, charging current should therefore be considered together with vehicle battery capability, daily energy demand and the overall charging schedule.
High-Current DC Charging Solutions
Injet offers standalone and distributed charging platforms for commercial sites requiring high-current liquid-cooled DC charging.
Injet HanHui 480
HanHui 480 provides high-power standalone DC charging for commercial and fleet sites, with liquid-cooled charging capability up to 600A for compatible vehicles.
Injet HanYuan
HanYuan combines centralised power cabinets with separate charging dispensers, supporting multi-bay fleet sites where high-current charging needs to be deployed across several vehicle positions.
Related High-Current Charging Guides
Explore practical guidance for high-power fleet charging, charger selection and distributed charging architecture.
How to Design EV Charging Infrastructure for Electric Trucks
Plan charging power, vehicle turnaround and depot infrastructure for high-energy electric truck fleets.
Read GuideHow to Choose a DC Fast Charger for Your Commercial Fleet
Compare charging power, current capability and site requirements before selecting commercial DC equipment.
Read GuideDistributed Charging Systems Guide
Understand how centralised power capacity can support multiple high-demand charging bays across a fleet depot.
Read GuideDoes Your Fleet Need Liquid-Cooled DC Charging?
Tell us about your vehicles, charging current requirements, dwell time and site power. Our UK team can help you compare high-current standalone and distributed charging options.
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