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Mene Grande Oil Field
The Mene Grande oil field is an oil field on Lake Maracaibo in Zulia, Venezuela, discovered in 1914 and regarded as the country's first giant field.
Mengdigou Hydropower Station
Mengdigou Hydropower Station is a large hydropower project under construction on the Yalong River in Sichuan, China, approved in 2021 with a 2,400 MW capacity and river closure in October 2025.
Mengtai Beijiao power station
Mengtai Beijiao power station is a coal-fired combined heat and power plant in Dongsheng District, Ordos, Inner Mongolia, China, with an installed capacity of about 1,980 MW.
Menzel Ledjmet Nord Oil Field
Menzel Ledjmet Nord (MLN) is an onshore oil field in Block 405a of Algeria's Berkine Basin, discovered in 1996 and producing since 2003, operated by Pertamina.
Meota East Colony Oil and Gas Pool
The Meota East Colony Sand Pool, code 100020, is a heavy-oil pool near Meota, Saskatchewan, produced by SAGD and operated by Strathcona Resources since 2020.
Meota Lloydminster Oil Pool
The Meota Lloydminster Oil Pool is an operating oil pool in Saskatchewan, Canada, discovered in 1974 and developed by steam injection in the Lloydminster heavy oil district.
Merakes Gas Field
Merakes is a deepwater natural gas field in the Kutei Basin offshore East Kalimantan, Indonesia, discovered in 2014 with about 2 trillion cubic feet of gas, producing since 2021.
Meralco
Meralco, also called the Manila Electric Company, is the Philippines' largest private electric distribution utility, serving about 8.2 million customers in Metro Manila and nearby provinces.
Mercuria
Mercuria is a Geneva-based independent energy and commodity trading group founded in 2004 by Swiss traders Marco Dunand and Daniel Jaeggi, generating over $100 billion in annual turnover.
Mercury and Air Toxics Standards
The Mercury and Air Toxics Standards (MATS) are US EPA emission limits for mercury and other hazardous air pollutants from coal- and oil-fired power plants, effective in 2015.
Mercury battery
The mercury battery, also called a mercuric oxide battery or mercury cell, is a non-rechargeable battery with steady 1.35-volt output, invented by Samuel Ruben in 1942 for the US military.
Mercury NZ
Mercury NZ, formerly Mighty River Power, is a New Zealand electricity generator and retailer based in Auckland, generating entirely from renewable hydro, geothermal, and wind sources.
Meren Energy
Meren Energy, formerly Africa Oil Corp., is a Canadian oil and gas company with producing deepwater fields offshore Nigeria and interests in Namibia and South Africa.
Merging unit
A merging unit (MU) is a device in a digital substation that converts analog currents and voltages from instrument transformers into digitized IEC 61850 Sampled Values streams.
Mero (company)
MERO ČR, a.s. is the Czech state-owned operator of the country's crude oil pipeline and storage infrastructure, founded in 1994 and 100% owned by the Czech Ministry of Finance.
Mero Oil Field
Mero (Campo de Mero) is a giant ultra-deepwater oil field in the pre-salt Santos Basin, about 180 km off Rio de Janeiro, discovered in 2010 and operated by Petrobras.
Merom Generating Station
Merom Generating Station is a two-unit, 1,080 MW coal-fired power plant in Sullivan County, Indiana, built by Hoosier Energy and sold to Hallador Energy in 2022.
MES (transmission system operator)
MEPSO, formally the Electricity Transmission System Operator of the Republic of North Macedonia, is the sole electricity transmission system operator of North Macedonia, a fully state-owned company in Skopje established in 2005.
Mesaieed
Mesaieed (مسيعيد), also known as Umm Said, is an industrial city and port about 40 km south of Doha, Qatar, handling crude oil exports and refining.
Mesaieed CCGT power station
The Mesaieed CCGT power station, also known as Mesaieed A or M Power, is a 2,000-megawatt combined cycle gas turbine plant near Doha, Qatar, completed in 2010.
Meso-superstructured perovskite solar cell
The meso-superstructured perovskite solar cell (MSSC), introduced at Oxford in 2012, coats a perovskite absorber on an insulating mesoporous alumina scaffold, proving the perovskite transports its own charges and reaching 10.9% efficiency.
Mesoscopic perovskite solar cell
A mesoscopic perovskite solar cell is a perovskite photovoltaic device in which the absorber forms inside a porous metal-oxide scaffold, an architecture descended from the dye-sensitized solar cell.
Mesquite Solar
Mesquite Solar is a utility-scale photovoltaic solar power complex in Arlington, Arizona, about 40 miles west of Phoenix, reaching about 530 MW of operating capacity in January 2024.
Messla Oil Field
Messla Oil Field (حقل مسلة) is a major oil field in Libya's Sirt Basin, discovered in 1971 and operated by AGOCO, a National Oil Corporation subsidiary.
Metal exsolution in perovskite electrodes
Metal exsolution is the process where metal cations in a perovskite oxide electrode are reduced and emerge as socketed catalytic nanoparticles on the surface, used in solid oxide cells.
Metal hydride compressor
A metal hydride compressor is a thermally driven device that compresses hydrogen by absorbing it into a metal alloy at low temperature, then heating it to release high-pressure hydrogen.
Metal hydride thermal energy storage
Metal hydride thermal energy storage is a thermochemical method that stores heat through reversible hydrogen absorption in metal hydrides, offering high storage density for solar plants and waste heat.
Metal oxide redox thermal energy storage
Metal oxide redox thermal energy storage is a thermochemical technology that stores heat in the reversible reduction of a metal oxide and releases it on reoxidation with air.
Metal-clad switchgear
Metal-clad switchgear (MC switchgear) is medium-voltage switchgear in which circuit breakers, buses, and cable terminations are housed in separate compartments enclosed by grounded metal barriers.
Metal-enclosed switchgear
Metal-enclosed switchgear is power switching equipment enclosed on all sides and top in sheet metal, containing switches, circuit breakers, fuses, and buses for medium-voltage distribution, standardized by IEEE C37.20.3.