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GEN Energija

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GEN Energija is a Slovenian state-owned electricity company and the parent of the GEN Group.

Last updated August 26, 2026

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Overview

GEN Energija, legally GEN energija, d.o.o., is a state-owned Slovenian power company and the parent organization of the GEN Group. Its principal role is to manage and coordinate a portfolio of electricity-generation and energy-trading businesses connected with Slovenia's power system. The group includes the Krško Nuclear Power Plant, Savske elektrarne Ljubljana, Hidroelektrarne na Spodnji Savi, Termoelektrarna Brestanica and the electricity-trading company GEN-I. The company was created in 2001 under the name Eles Gen as a subsidiary of Elektro-Slovenija, Slovenia's electricity-transmission company. Its original purpose was to hold Slovenia's interests in the Krško Nuclear Power Plant. Krško is a strategically important generating asset in Slovenia and is jointly owned by Slovenia and Croatia through their respective energy companies. The creation of Eles Gen provided a dedicated corporate structure for the Slovenian side's ownership and related activities. In February 2006, GEN Energija was separated from Elektro-Slovenija and became directly owned by the Slovenian state. This change established the company as an independent state-owned energy holding company rather than a subsidiary within the transmission-system organization. It subsequently developed into the parent of a broader group covering nuclear, hydroelectric and thermal generation as well as electricity trading. GEN Energija's business scope is therefore broader than that of a conventional consumer-facing electricity brand. It operates primarily as a corporate and institutional energy group, overseeing generation assets, group companies and strategic infrastructure projects. Its activities are closely tied to electricity security, low-carbon generation, system flexibility and the long-term development of Slovenia's energy supply. The group's principal strategic project is the proposed second unit at the Krško nuclear site, commonly referred to as JEK2. The proposal envisages a new third-generation pressurised-water reactor located near the existing Krško plant, with planned capacity close to 1,100 megawatts. According to the cited project plans, construction was expected to begin in 2027 and commercial operation was targeted for 2033. These dates represent planning assumptions rather than a completed project timetable. GEN Energija is thus positioned as a national energy-infrastructure institution rather than an internationally marketed commercial brand. Its importance derives from its ownership of or participation in major Slovenian electricity assets, its role in the GEN Group and its involvement in decisions about the future of nuclear power in Slovenia.

History

GEN Energija was established in 2001 as Eles Gen, a subsidiary of Elektro-Slovenija. Its initial institutional purpose was to hold Slovenia's shares in the Krško Nuclear Power Plant. The company was therefore created around a specific national electricity asset and ownership function rather than as a conventional retail power brand. In February 2006, the company was separated from Elektro-Slovenija and became directly owned by the Slovenian state. This restructuring gave GEN Energija an independent position within Slovenia's public energy sector. It later became the parent company of the GEN Group, assembling a portfolio that includes nuclear, hydroelectric and thermal generation businesses together with the energy-trading company GEN-I. The GEN Group's operating companies cover several parts of the electricity value chain. The Krško Nuclear Power Plant represents the group's nuclear-generation interest. Savske elektrarne Ljubljana and Hidroelektrarne na Spodnji Savi represent hydropower activities, while Termoelektrarna Brestanica provides thermal-generation capacity. GEN-I operates in energy trading. Through this group structure, GEN Energija combines ownership, coordination and strategic oversight across generation and market-facing energy activities. The company's continuing strategic focus is the development of additional nuclear capacity at Krško. The JEK2 proposal places a second unit in the vicinity of the existing plant, to its west. The planned design is described as a third-generation pressurised-water reactor with installed capacity close to 1,100 MW. Project plans cited by the reference material proposed construction beginning in 2027 and operation from 2033. These dates should be understood as planned targets, not evidence that construction or operation had begun. GEN Energija's history reflects the evolution of Slovenia's state energy institutions: from a dedicated vehicle for holding the country's interest in Krško, through separation from the transmission company, to a broader energy holding company responsible for a diversified generation and trading group. Its role remains closely connected to national electricity policy, strategic infrastructure and the future balance between nuclear, hydroelectric and thermal generation.

  • 2006

    Separated from Elektro-Slovenija

    [1]

    In February 2006, the company became independent from Elektro-Slovenija and was placed under direct ownership of the Slovenian state.

  • 2001

    Established as Eles Gen

    [1]

    The company was created as a subsidiary of Elektro-Slovenija to hold Slovenia's shares in the Krško Nuclear Power Plant.

  • GEN Group portfolio established

    [1]

    GEN Energija became the parent company of a group comprising nuclear, hydroelectric and thermal power companies and the energy trader GEN-I.

  • JEK2 proposed at the Krško site

    [1]

    The company advanced plans for a second nuclear unit near the existing Krško Nuclear Power Plant, with proposed capacity close to 1,100 MW.

Products and positioning

A state-owned Slovenian energy holding company focused on electricity generation, energy trading, management of strategic power assets and long-term national energy security.

  • Power generation

    Electricity generation

    GEN Energija coordinates a group with nuclear, hydroelectric and thermal generating assets. The portfolio is designed to support Slovenia's electricity supply and includes the Krško Nuclear Power Plant, hydropower companies and Termoelektrarna Brestanica.

  • Energy trading

    Electricity trading

    Energy trading is represented within the GEN Group by GEN-I. This activity complements the group's generation portfolio by participating in electricity markets and related commercial energy activities.

  • Nuclear energy project

    JEK2

    JEK2 is the proposed second nuclear power plant unit at the Krško site. Plans describe a third-generation pressurised-water reactor with capacity close to 1,100 MW. The proposal is intended to expand Slovenia's nuclear-generation capability.

Brand decisions

  • Plan a second nuclear unit at KrškoStrategy

    Background

    GEN Energija identified the construction of a second nuclear power plant unit as its key strategic project, in the context of Slovenia's long-term electricity supply and generation planning.

    Action taken

    The proposal places JEK2 near the existing Krško Nuclear Power Plant and specifies a planned third-generation pressurised-water reactor with installed capacity close to 1,100 MW.

    Aftermath

    The cited plans anticipated construction beginning in 2027 and operation beginning in 2033. The reference does not establish that either milestone had been achieved.

Sources1 sources

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