The APFC panels are known to be employed when energy savings are a priority. It just so happens that their design can accommodate the fluctuation in power supply and voltage, and maintain the high power factor at a stable consistency.
The types of machinery used in the industry, along with various devices, and cooling plants shall determine the electrical load required by a unit. In case of the slightest fluctuation, the machines could get damaged. Capacitors are used to safeguard the equipment for fixed loads, while for varied loads capacitors with a switch in and switch out mechanism is used.