We manufacture APFC panels where a microprocessor based controller is used which switch the capacitor banks automatically according to load pattern. Motors, machines, drives etc are severely inductive in nature which results in lagging power factor. Lagging power factor leads to energy wastage and consequently heavy penalties by electricity boards. If the load is fixed, manual switching of capacitor works. However, if the load is varying and scattered, it is difficult to maintain Power Factor by proper manual switching of capacitors.