Opus Energy Limited supplied gas and electricity to businesses across the United Kingdom. It purchases electricity from wind, solar, hydro, and anaerobic digestion generators, and provides support to develop energy-generating sites.

NextEra Energy, Inc. is an American energy company that is the world's largest electric utility holding company by market capitalization, with a valuation of over $187 billion as of July 2026.

The Energy Institute (EI) is a professional organization for engineers and other professionals in energy-related fields. The EI was formed in 2003 by the merger of the Institute of Petroleum (dating back to 1913) and the Institute of Energy (dating back to 1925).

In 2018, Nigeria's primary energy consumption was about 155 Mtoe. Most of the energy comes from traditional biomass and waste, which accounted for 73.5% of total primary consumption in 2018.

A low-energy house is characterized by an energy-efficient design and technical features which enable it to provide high living standards and comfort with low energy consumption and carbon emissions. Traditional heating and active cooling systems are absent, or their use is secondary.

The International Energy Agency (IEA) is a Paris-based autonomous intergovernmental organization, established in 1974, that provides policy recommendations, analysis and data on the global energy sector. The 32 member countries and 13 association countries of the IEA represent 75% of global energy demand.

Obsidian Energy Ltd. (previously known as Penn West Exploration Ltd., Penn West Petroleum and Penn West Energy Trust) is a mid-sized Canadian oil and natural gas production company based in Calgary, Alberta.

The Ruakākā Energy Park is a co-located battery energy storage system (BESS) and photovoltaic power station in Ruakākā, Northland, New Zealand. The BESS has an output of 100MW and storage of 200MWh.

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Bulb Energy Ltd, trading as Bulb, was an energy supply company in the United Kingdom acquired by Octopus Energy in 2022. Founded in 2013, the company attracted venture capital from DST Global and Magnetar Capital and ran at a financial loss while achieving rapid growth in customers.