Is power factor saver true?

Short answer: No — “power factor saver” devices are mostly a scam for home users.

Here’s why:

1. How power factor works
   
• Power factor measures how efficiently electrical power is being used.
• A perfect power factor is 1 (or 100%), meaning all the power drawn is used for work.
• A low power factor means some power is wasted as reactive power (magnetic/electric field energy in motors, transformers, etc.).
2. Who gets billed for power factor
   
• Homes (residential users): Power companies charge only for kWh (real power). They do not bill you for poor power factor.
• Factories and businesses: Large industrial users may be charged penalties for low power factor, because it stresses the grid.
3. What “power saver” devices claim
   
• They say they reduce your electric bill by “correcting power factor.”
• But in homes, fixing power factor doesn’t lower your bill, because you aren’t charged for reactive power in the first place.
4. Real effect
   
• These devices are usually just capacitors. They can slightly improve power factor for appliances with motors (like fridges, pumps, ACs), but the savings on a residential bill are almost zero.
• They can even be harmful if badly designed, because they can overcorrect and cause voltage spikes or capacitor failure.
5. Better way to save power
   
• Use energy-efficient appliances (inverter ACs, LED lights).
• Turn off idle electronics and unplug chargers.
• If you run many motors, proper maintenance (like lubricating bearings) is more effective than any “magic box”.