Choosing a 20–240 kW DC charging configuration
Compare DC cabinet ratings, outlet sharing, vehicle voltage, charging windows and site capacity before choosing equipment.
On this page 5 sections
Choose a DC charger around the energy a vehicle needs during its available stop, then check the vehicle and site limits. The cabinet’s headline rating is an upper specification for a configuration; it is not a promise of constant power to every vehicle or to every outlet simultaneously.
Start with the charging requirement
No DC charger models are currently listed. Before comparing equipment, record the energy required per vehicle, available charging time, simultaneous vehicle count and usable site capacity. These inputs define the output and sharing requirements to review with a supplier.
The 20–240 kW range in this guide is a planning scope, not a list of products offered by Ampvoya.
Why does voltage matter?
DC electrical power follows power = voltage × current. As an arithmetic illustration, 400 V at 200 A is 80 kW. A cabinet labelled 240 kW cannot deliver 240 kW at that voltage through an outlet limited to 200 A. Ask for the real power-versus-voltage curve and the connector current limit.
This is an arithmetic illustration, not a verified operating point for a listed product.
Plan energy and time separately from peak power
An illustrative 40 kWh energy addition over one hour requires 40 kW on average before allowing for losses or interruptions. Real charging can slow as the battery fills or temperature changes, so dividing energy by the cabinet’s maximum rating can underestimate the required time.
For fleets, route energy, arrival times and departure deadlines are useful planning inputs. The U.S. Department of Energy also highlights the role of charging windows and networked management in fleet planning. DOE fleet guidance.
Ask how two vehicles share the charger
Request three cases: one vehicle connected, two vehicles requesting maximum power, and one vehicle reducing its request. Document the total cabinet limit, each outlet limit, module allocation and how the remaining power is reassigned.
Build the site brief
Include the available utility capacity, measured building demand, intended number of bays, vehicle mix, payment method, backend, cable reach and maintenance access. Grid connection and installation design need a site-specific engineering assessment.
Continue with public charging or fleet charging, then include the site requirements in your enquiry.