What is DCFC Charging?
DCFC stands for Direct Current Fast Charging. Unlike L2 EVSE that sends AC power to the EV onboard charger which converts to DC to charge the battery, DCFC chargers convert AC to DC in the charger and then deliver high current DC power directly to the battery in the EV, bypassing the onboard charger. This results in a more efficient and faster charge. These DCFC systems are far more sophisticated electrical devices than L2 and require considerable electrical make-ready infrastructure to power them. For most DCFC projects, we are required to work with the electric utility to deliver and install a new service consisting of a 480V transformer and all the associated switchgear to power the chargers.
Applications for DCFC Charging
Think road tripping and situations where a 15–30 minutes can result in a full charge. In public charging stations, DCFC will cost more per kWh than L2 but is critical for applications where long travel is typical. Most DCFC charging stations are being constructed on premises or nearby amenities such as at a gas station, coffee shops, quick serve restaurants and Pump N Pantry type convenience stores. This allows the driver to check emails, use the facilities, grab a snack and be on their way. Most often, the EV is not left unattended since the charge occurs in a short period of time.
To learn more about DCFC chargers, click the logos:
