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 Saving with Smart Capacitors

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How does an Automatic Power Factor Control Panel work?


APFC Panel has microcontroller based programmable controller which switches the capacitor banks of suitable capacity automatically in multiple stages by directly reading the reactive load (RKVA) which works in the principle of VAR sensing tends to maintain the PF to 0.99 Lag.

Can capacitor reduce electric bill?


The capacitor stores (otherwise lost energy/watts) and releases energy to your motor when needed to function properly. This reduces the amount of heat on the wires and the motors in your home or business. Reducing this heat will lower your electricity bill and increase the life of your motors.

Learn about Power Factor...


In the video below, we will illustrate everything about Power Factor starting at the basics. We will cover the following important aspects of Power Factor beginning with, What is Power Factor, What is good and bad Power Factor, how to fix bad Power Factor, what is leading Power Factor, what is lagging Power Factor, how capacitors, inductors and resistors affect circuits and the importance of how to calculate the Power Factor correction.

US Department of Energy 

Power Factor is a Department of Energy-promoted measure of how efficiently you're using power. DoE says, "low power factor is expensive and inefficient." Low power factor reduces your electrical system's distribution capacity by increasing current flow and causing voltage drops.

Ideally, everyone wants a Power Factor of 1. DoE studies indicate that the average US residence has a Power Factor of .77, an negative .23 deficit. This means there's plenty of room for improvement. Commercial and institutional power is not likely to fare as well as residential on their Power Factor score, and there's usually plenty of savings waiting to be discovered.

Understanding Your Utility Bill Charges

How does power factor affect electric bill?


An inefficient power factor will increase a client's utility bill because the power factor will cause the kVA demand to be higher than the kW demand.  By accumulating and holding electricity, capacitors increase a system's carrying capacity, which raises the kW power factor and reduces kVA demand.

How PF Capacitors Save Money


Capacitors lower electrical costs two ways

  • In many areas, the electrical rate includes a penalty charge for low power factor. Installation of power capacitors on the electrical distribution system within a facility makes it unnecessary for the utility to supply the reactive power required by inductive electrical equipment. The savings the utility company realizes in reduced generation, transmission, and distribution costs are passed on to the customer in the form of lower electrical bills


  • The second source of savings derived through the use of power factor correction capacitors is in the form of increased KVA capacity in the electrical distribution system. Installation of capacitors to furnish the non-productive current requirements of the facility makes it possible to increase the connected load by as much as 20 percent without a corresponding increase in the size of the transformers, conductors, and protective devices making up the distribution system which services the load.

How is PF calculated on electricity bill?


Power factor (PF) is the ratio of useful current to total current. It is also the ratio of useful power expressed in kilowatts (KW) to total power expressed in kilowatt-amperes (KVA). Power factor is usually expressed as a decimal or as a percentage.

  1. Suppose Actual P.F is 0.8, Required P.F is 0.98 and Total Load is 516KVA.

  2. Power factor = kwh / kvah.

  3. kW = kVA x Power Factor.

  4. = 516 x 0.8 = 412.8.

  5. Required capacitor = kW x Multiplying Factor.

  6. = (0.8 x 516) x Multiplying Factor.

What causes Power Factor scores to be less than ideal?

Your electrical distribution system is a network. The big pipe coming in is the load provided by the power company to connect to your distribution panel. This panel redistributes the big load to a network of smaller loads and from there energy is piped out to sub-panels as needed throughout the organization. Then, devices are connected to these circuits. 


For qualifying purposes- here's what you look for:

Age of equipment connected, motors, pumps, non-Energy Star compliant equipment, blowers, fans, cooling and heating units, elevator motors, pool pumps and air compressors. This applies to almost any residence or business facility. The equipment listed and used in these cases may not be as efficient at using power as they should be.

Power Factor is measurable and if it can be measured, then it can be managed and that's the good news.