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Electrolysis of water
Electrolysis of water, also called water electrolysis, is the use of electricity to split water into hydrogen and oxygen in a device called an electrolyzer.
Electrolyte additive
An electrolyte additive is a minor component, a few tenths of a percent to a few weight percent, dissolved in lithium-ion battery electrolytes to improve stability, cycle life, and safety.
Electromagnetic transient simulation
Electromagnetic transient (EMT) simulation is a time-domain numerical method computing instantaneous power network voltages and currents during fast disturbances like switching, faults, and lightning, introduced by Hermann Dommel in 1969.
Electron transport layer
An electron transport layer is an n-type semiconductor film in a solar cell that extracts photo-generated electrons to the electrode and blocks holes, used chiefly in perovskite solar cells.
Electroperú
Electroperú (Empresa de Electricidad del Perú S.A.) is a Peruvian state-owned electricity company founded in 1972, whose Mantaro complex supplies about 13 percent of Peru's energy.
Electrovaya
Electrovaya is a Canadian lithium-ion battery technology and manufacturing company founded in 1996 in Mississauga, Ontario, known for its ceramic-enhanced Infinity Battery Technology and a Jamestown, New York manufacturing plant.
Elektrik Üretim A.Ş.
Elektrik Üretim A.Ş. (EÜAŞ), Electricity Generation Corporation, is Turkey's state-owned power producer, created in 2001 from the split of TEAŞ and still the country's largest.
Elektroprivreda BiH
Elektroprivreda BiH (EPBiH) is the largest electric utility in Bosnia and Herzegovina, a public joint-stock company in Sarajevo generating, distributing, and trading electricity in the Federation of BiH.
Elektroprivreda Srbije Beograd
Elektroprivreda Srbije is a state-owned, vertically integrated power company in Serbia. It is the largest entity and country's main lignite producer, generating about 70% of electricity.
Elephant's Foot (Chernobyl)
The Elephant's Foot is a solidified lava-like mass of melted nuclear fuel, or corium, formed during the 1986 Chernobyl accident and discovered in fall 1986 beneath Reactor 4.
Elering
Elering is the Estonian electricity and gas transmission system operator, founded in 2010 through separation from Eesti Energia, and led Estonia's 2025 power grid synchronization with Continental Europe.
ELES
ELES, fully owned by the Republic of Slovenia, is the country's electricity transmission system operator. Founded in 1990 and based in Ljubljana, it operates the 110, 220, and 400 kV network.
Eletronorte
Eletronorte (Centrais Elétricas do Norte do Brasil) is a Brazilian electricity generation and transmission company, created by the federal government in 1973 to develop the Amazon region's power systems.
Eletronuclear
Eletronuclear, formally Eletrobrás Termonuclear S.A., is the Brazilian mixed-capital company that operates the Angra 1 and Angra 2 nuclear plants at Angra dos Reis, created in 1997.
Eletropaulo
Eletropaulo Metropolitana Eletricidade de São Paulo S.A. was a Brazilian electricity distributor serving greater São Paulo, created in 1981, privatized in 1998, and acquired by Enel in 2018.
Elf Aquitaine
Elf Aquitaine was a French oil and gas company formed in 1976 from state-owned predecessors, privatized in 1994, and taken over by TotalFina in 2000, later part of TotalEnergies.
Elgaugol
Elgaugol (Эльгауголь) is a Russian coal mining company, established in 2013, holding the license for the Elga coking coal deposit in Yakutia, one of the world's largest.
Elgin Oil and Gas Field
The Elgin Oil and Gas Field is a high-pressure, high-temperature gas and condensate field in the Central Graben of the UK North Sea, developed with the adjacent Franklin field by TotalEnergies.
Elginskiy Coal Mine
The Elginskiy Coal Mine (Эльгинское месторождение, also called the Elga deposit) is a large open-pit coking coal mine in the Neryungri Region of Sakha (Yakutia), Russia.
Elia Group
Elia Group is an Euronext-listed holding company that owns the Belgian transmission system operator Elia and the German operator 50Hertz, keeping power flowing for more than 30 million people.
Elk Creek NGL Pipeline
The Elk Creek NGL Pipeline is a 900-mile pipeline owned by ONEOK that carries natural gas liquids from the Williston Basin in Montana to Bushton, Kansas, completed in 2019.
Elk Hills Oil Field
The Elk Hills Oil Field is a large oil and gas field in Kern County, California, once Naval Petroleum Reserve No. 1 and sold to Occidental Petroleum in 1998.
Elk Valley Resources
Elk Valley Resources is a Canadian steelmaking coal producer operating four mines in the Elk Valley of southeastern British Columbia, majority owned by Glencore since 2024.
Elkview Coal Mine
The Elkview Coal Mine, officially Elkview Operations, is an open-pit steelmaking coal mine in British Columbia's Elk Valley near Sparwood, opened in 1969 and operated by Elk Valley Resources.
Elm Road power station
Elm Road Generating Station is a two-unit coal-fired power plant at We Energies' Oak Creek site on Lake Michigan, Wisconsin, operating since 2010 with about 1,268 MW capacity.
Elmworth Oil and Gas Field
Elmworth Oil and Gas Field is a giant natural gas field in the Deep Basin of west-central Alberta, discovered in 1976, holding an estimated 17 trillion cubic feet of gas.
Elnusa
Elnusa (PT Elnusa Tbk) is an Indonesian integrated energy services company founded in 1969 as a Pertamina support contractor and controlled by Pertamina Hulu Energi, which holds 51.10%.
Elster (metering company)
Elster is a metering brand and former company group that makes gas, electricity, and water meters, acquired by Honeywell from Melrose Industries in 2015 for about $5.1 billion.
Elvy
Elvy, formerly Geofy, is a Stockholm-based Swedish startup founded in 2023 that sells residential solar panels, heat pumps, and home batteries through a 15-year fixed-price subscription.
Elwood Energy power station
Elwood Energy is a natural gas-fired peaking power station in Elwood, Will County, Illinois, about 60 miles southwest of Chicago, built in two phases beginning in 1999.