These panels are used in commercial buildings and industries where there is fluctuation in voltage and power supply the electrical load required by a unit depends upon the type of Machineries, cooling plants and other device installed there is always a possibility of damage of these equipments if power fluctuates. in case of fixed loads they can be safeguarded using capacitors, but in case of varied loads, a mechanism to switch in and switch out the capacitors is required which is basically handled using APFC panels.