Reactive Energy Converter

Convert reactive energy between volt-ampere reactive hours (VARh), kilovolt-ampere reactive hours (kVARh), megavolt-ampere reactive hours (MVARh), and other electrical energy units. Reactive energy is important in power systems for capacitor bank sizing and utility billing.

Understanding Reactive Energy

Reactive energy measures the energy stored and released by inductive and capacitive loads in AC power systems. It is measured in volt-ampere reactive hours (VARh), analogous to how real energy is measured in watt-hours (Wh). Utility companies often bill for reactive energy above a power factor threshold.

Frequently Asked Questions

What is the difference between VARh and kVARh?

One kilovolt-ampere reactive hour (kVARh) equals 1000 volt-ampere reactive hours (VARh). kVARh is the standard billing unit for reactive energy on utility meters.

How is reactive energy related to power factor?

Reactive energy accumulates when current and voltage are out of phase. A low power factor means more reactive energy circulates in the system, which utilities may penalize through demand charges.

What is MVARh used for?

Megavolt-ampere reactive hours (MVARh) are used for large industrial installations and grid-level reactive power measurements. One MVARh equals one million VARh.

Is reactive energy the same as real energy?

No. Real energy (measured in Wh or kWh) does useful work. Reactive energy (VARh) oscillates between source and load without performing net work, but still affects system capacity and billing.

Related: Energy Converter and Power Converter.

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Reactive Energy Converter