Electrical energy or Electromagnetic energy is a form of energy present in any electric field or magnetic field, or in any volume containing electromagnetic radiation. The SI unit of electrical energy is the joule, while the unit used by electrical utility companies is the watt-hour (Wh) or the kilowatt-hour (kWh.)

Electrical energy is related to the position of an electric charge in an electric field. The electrical energy of a charge Q situated at the electric potential V equals to the product QV. If V is a potential difference, the same expression gives the energy transformed when the charge moves through the potential difference.

Electrical energy is also identical to the electromagnetic fields surrounding a transmission line, contained in capacitors and inductors, or propagating in space as electromagnetic radiation. The quantity of electrical energy surrounding a conductor or travelling through a waveguide may be calculated by integrating the cross product of the magnetic and electric field vectors throughout the volume.

The topic regarding the production, distribution, and use of electrical energy is called electric power, and this term is frequently used as an inaccurate name for electrical energy. In other words, the phrases "flow of power" and "consume a quantity of electric power" are incorrect, and should be changed to "flow of energy" and "consume a quantity of electrical energy", respectively.

da:Elektrisk energi it:energia elettrica