ElektroMreza Srbije (EMS), Serbia's power transmission network operator, plans to invest €400m by 2020 to upgrade its transmission grid and to develop new interconnections with neighbouring EU countries. The Balkan country, which started negotiations to enter the European Union in 2014, plans to fully liberalise its electricity market in January 2015 but needs to modernise its ageing transmission system to develop its electricity market. Serbia is considering a new power interconnection line with Montenegro, to connect the 2,660 MW Nikola Tesla coal-fired power plant in Obrenovac to the Montengro border; Serbia could get connected to Italy, when an interconnection project from Montenegro could be commissioned in 2020. Serbia also considers building a new interconnection from its Pancevo refinery and petrochemical complex to Romania. Additional interconnections could be built with Macedonia and Bosnia-Herzegovina.