The Estonian and Latvian electricity transmission system operators (TSOs) Elering and Augstsprieguma tīkls (AST) have signed a memorandum of understanding (MoU) to build a new 1 GW interconnector between Estonia and Latvia. This new interconnector, which will be built in hybrid mode, will be the fourth connecting the two countries and will contribute to the development of renewable energy sources in the Baltic Sea region. The exact location and route of the interconnector and other technical details will be agreed on at later stages. The project is expected to be completed after 2030.
Estonia currently has a 1.4 GW interconnection capacity with Latvia, consisting in three 330 kV lines. Two other Estonian-Latvian interconnections are also under construction as a part of Baltic States synchronisation project with continental Europe: the Valmiera-Tartu transmission line construction has been finalised in June 2023, while the Valmiera-Tsirguliina line remains under construction until the end of 2024.