Broker: An entity that arranges the sale and purchase of electric energy, transmission, and other services between buyers and sellers, but does not take title to any of the power sold.

Demand: The rate at which energy is delivered to loads and scheduling points by generation, transmission, and distribution facilities.

Distribution: The delivery of electricity to retail customers (including homes, businesses, etc.).

Distribution System: The portion of an electric system that is dedicated to delivering electric energy to an end user.

Electric Service Provider: An entity that provides electric service to a retail or end-use customer.

Energy Charge: That portion of the charge for electric service based upon the electric energy (kWh) consumed or billed.

Green Power: Electricity generated from renewable resources.

Grid: Usually used to describe the interconnected transmission system.

Kilowatt (kW): A unit of energy equal to 1,000 watts.

Kilowatt-hour (kWh): A unit of energy equal to 1,000 watts over the course of 1 hour. The kWh is most commonly known as a billing unit for energy delivered to consumers by electric utilities.

Load: The amount of electric power delivered or required at any specific point or points on a system. The requirement originates at the energy-consuming equipment of the consumers.

Megawatt (MW): One million watts.

Megawatthour (MWh): One million watthours.

Supply: Electricity available to the grid.

Transmission: The movement or transfer of electric energy over an interconnected group of lines and associated equipment between points of supply and points at which it is transformed for delivery to consumers, or is delivered to other electric systems. Transmission is considered to end when the energy is transformed for distribution to the consumer.

Wires Charge: A broad term which refers to charges levied on power suppliers or their customers for the use of the transmission or distribution wires.