 It was established 2001 as Eles Gen, a subsidiary of Elektro-Slovenija, for holding Slovenian shares in the Krško Nuclear Power Plant.In February 2006 the company was separated from Elektro-Slovenija and it became directly owned state-owned company.GEN Energija has invested in the Krško Nuclear Power Plant, Brestanica thermal power plant, "Savske elektrarne Ljubljana" and "Hidroelektrarne na Spodnji Savi" hydroplants, and small-scale photovoltaic power plants.