Does PFC Matter When Using Multiple Power Supplies on the Same Electrical Network?

Yes, it absolutely can. When you’re running multiple power supplies on the same circuit or electrical network, Power Factor Correction (PFC) becomes more important—especially if the combined load is significant.

1. Non-PFC Units Can Pollute the Power Line

Non-PFC or poorly corrected power supplies draw current in short, sharp pulses instead of a smooth waveform. When several of these are running together, they generate harmonic distortion on the AC line, which can:

• Interfere with sensitive electronics

• Trip circuit breakers unnecessarily

• Cause heating in wires and transformers

• Reduce overall power quality in your system

2. Active PFC Reduces Stress on the Network

Active PFC units smooth out the current draw, keeping it in phase with the voltage. This leads to:

• Lower peak currents

• Less harmonic noise

• Improved efficiency of your entire electrical system

So, if you’re running a server rack, LED controllers, industrial gear, or even a set of high-wattage LED drivers or PC PSUs, using PFC-enabled power supplies helps keep everything stable and prevents weird side effects caused by poor power quality.

3. Circuit Capacity Goes Further

Because PFC reduces wasted current, you’ll get more usable power out of the same circuit. That means:

• You’re less likely to overload breakers

• Voltage dips are less severe

• Power losses in wiring are reduced

4. Better Coexistence with UPS and Inverters

If you’re powering multiple supplies from an inverter or UPS, PFC becomes essential. Non-PFC loads can cause:

• Inverter overload or shutdown

• Buzzing or overheating in the UPS

• Inefficient battery usage

Bottom Line:

When you’re running multiple power supplies in the same system or on the same circuit, especially high-wattage ones, using Power Factor Corrected units helps prevent power quality issues, extends circuit capacity, and protects other gear on the same network.