When a company begins electrifying its fleet, the first question is usually why one charger costs and installs so differently from another when, in theory, both simply "charge an electric car." The answer lies in where the energy conversion actually happens.
With AC charging, alternating current from the grid travels all the way to the vehicle itself, where the car's internal charger (the OBC, On Board Charger) converts it to direct current before delivering it to the battery. That OBC has a limited power rating, typically between 3.7 and 22 kW, so no matter how much power the external charging point can deliver, the bottleneck sits inside the vehicle.
DC charging removes that step entirely: the charger converts the energy outside the vehicle and delivers it as direct current straight to the battery, communicating in real time with the battery management system (BMS) to adjust the exact power the battery can accept at any given moment.
For a fleet, this isn't a technical nuance — it's the difference between a vehicle sitting idle for eight hours or for forty-five minutes. If your operation depends on vehicle turnover — delivery, taxis, buses, fleet equipment — DC charging isn't an improvement, it's a condition for the business to be viable at all.