An Automatic Power Factor Correction (APFC) panel manufacturer creates a control system that automatically improves a facility's power factor. The process involves designing the panel with a microprocessor-based controller, a series of capacitor banks, and switching devices like contactors or thyristors. The controller continuously monitors the power factor and, when it drops below a set threshold, it intelligently and automatically switches on the appropriate capacitor banks to inject reactive power, thereby correcting the power factor and improving overall energy efficiency.