Estonia's electricity sector is interconnected with regional energy markets, particularly through connections with Finland and Latvia. Total energy supply (TES) includes all the energy produced in or imported to a country, minus that which is exported or stored. Some of these energy sources are used directly while most are transformed into fuels or. Estonia, officially the Republic of Estonia, is a Baltic country in northeastern Europe bordered to the north by the Gulf of Finland, to the west by the Baltic Sea, to the south by Latvia, and to the east by Russia and Lake Peipus. In addition to the mainland, Estonia's territory consists of the. ENTSO-E position, including recommendations, on the European Commission's Grids Package proposal.