An onboard charger (OBC) is the onboard charger that converts alternating current to direct current to charge an EV’s batteries. Fast-charging stations don’t need an EV’s OBC since they are already direct current.

An onboard charger (OBC) is the onboard charger that converts alternating current to direct current to charge an EV’s batteries. Fast-charging stations don’t need an EV’s OBC since they are already direct current.