This Practice Note provides an introduction to the use of arbitration as a method of dispute resolution for disputes in the energy sector. This Practice Note should be read in conjunction with the following Practice Notes: • Starting a claim in an energy dispute—a practical guide • Oil and gas projects—contracts and disputes • Oil and gas disputes—international dispute resolution framework and institutions Energy sector disputes Energy projects, whether in fossil fuels, nuclear, or renewable energies such as hydro, wind, geothermal, solar and tidal power, are characterised by capital-intensive and complex deals of typically large volumes. Transactions and investments are usually long-term in nature and frequently involve participants from different countries and cultural backgrounds. There are numerous types of dispute prevalent in the energy sector. They may manifest between project partners (including state actors), with lenders, with contractors in a supply chain, or other third parties. The disputes themselves can concern a wide range of issues—for example, joint venture disputes, expropriation, environmental issues, financing, pricing reviews, construction