Electric Service Provider


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


Electric Utility


Definition: A corporation, person, agency, authority, or other legal entity or instrumentality that owns and/or operates facilities within the United States, its territories, or Puerto Rico for the generation, transmission, distribution, or sale of electric energy primarily for use by the public and files forms listed in the Code of Federal Regulations, Title 18, Part 141. Facilities that qualify as cogenerators or small power producers under the Public Utility Regulatory Policies Act (PURPA) are not considered electric utilities.


Electrical Spikes


Definition: Fast, short-duration electrical transients (a temporary excess of voltage and/or current in an electrical circuit that has been disturbed).


Electricity Forward Agreement


Definition: A contract calling for the delivery of and payment for electric power in a future period.


Electricity Forward Agreement Day


Definition: A twenty-four-hour period commencing at 23:00.


Electricity Forward Agreement Month (EFA Month)


Definition: A month calculated in accordance with a pattern of days generally known in the UK electricity market and not necessarily equating with a calendar month.


Electricity Forward Agreement Quarter


Definition: A quarter calculated in accordance with a pattern of days generally known in the UK electricity market.


Electricity Forward Market


Definition: A brokered over-the-counter market in the UK for short to medium-term electricity derivative instruments, of which the most widely used is the electricity forward agreement.




Definition: The balancing and settlement code company that procures and provides services to administer and implement the balancing and settlement rules. Signatories to the BSC contribute to the costs of Elexon. Charges are levied to recover the costs of running Elexon.


Elliott Wave Theory


Definition: A theory of market behavior published by Ralph Nelson Elliott in the 1930s. According to the theory, the stock market follows a pattern of five waves up and three waves down to form a complete cycle.


Embedded Costs


Definition: The cost of all the facilities in electricity or natural gas supply system.


EU Emissions Trading Scheme (EU ETS)


Definition: One of the policies being introduced across Europe to reduce emissions of carbon dioxide.


Emission Reduction Unit (ERU)


Definition: One tonne of CO2 equivalent abatement is achieved through a joint implementation project. ERUs can be traded in greenhouse gas trading systems.




Definition: The consumer of electricity or gas.


End of Curve Pricing


Definition: The extension of an existing energy or gas contract with the permission of a supplier. 


Entry Cost


Definition: A tariff for using the UK’s national gas transmission system.


European Emission Allowance (EUA)


Definition: Carbon credit that is issued under the EU ETS, equivalent to one tonne of CO2.


European Energy Exchange


Definition: An exchange offering futures and spot markets in electricity and carbon.




Definition: A trading arena where commodities and securities are bought and sold.


Export Metering


Definition: The enabling of a site to export its generated electricity.