Elektro-Slovenija

Elektro-Slovenija, commonly known as ELES, is Slovenia's state-owned electricity network company. Founded by the Government of Slovenia in 1991, it serves as the country's sole electricity transmission system operator. Its principal responsibility is the operation, maintenance and development of Slovenia's high-voltage transmission infrastructure, linking electricity generation, distribution networks and cross-border power systems. ELES operates transmission lines at 400 kV, 220 kV and 110 kV voltage levels. The network described in reference material has a combined length of approximately 2,587 kilometres. This infrastructure supports the movement of electricity across Slovenia and contributes to the reliability, balancing and security of the national power system. As a transmission system operator, ELES is distinct from an electricity retailer: its role is network management and system operation rather than selling household electricity under a conventional consumer brand. The company is also integrated into the European electricity-system framework. ELES is a member of the European Network of Transmission System Operators for Electricity, known as ENTSO-E. Membership places the Slovenian operator within the institutional and technical arrangements used by European transmission operators to coordinate system operation, cross-border exchanges and network planning. A significant change in ELES's scope took effect on 2 October 2023, when SODO d.o.o., Slovenia's distribution network company, was merged into ELES. Following that transaction, ELES became not only the national transmission system operator but also the distribution system operator. The change brought transmission and distribution-network responsibilities under one state-owned company, broadening ELES's operational remit across Slovenia's electricity-network chain. ELES is headquartered in Ljubljana and operates primarily within Slovenia, while its transmission-system role necessarily involves regional and European interconnection. The company is led by managing director Aleksander Mervar. Its public-utility identity is defined by infrastructure stewardship, system reliability, network investment and coordination with national and international electricity-sector institutions rather than by consumer-facing product differentiation.

Elektro-Slovenija, generally abbreviated as ELES, was established in 1991 by the Government of Slovenia. Its creation placed the operation of the country's electricity-transmission infrastructure within a dedicated national company during the early period of Slovenia's independent state institutions. ELES's core mandate has been to operate the national high-voltage electricity network and to provide the system-level coordination required to move electricity safely and reliably between generation facilities, distribution networks and international interconnections. The company is Slovenia's only electricity transmission system operator. Its network includes 400 kV, 220 kV and 110 kV transmission lines, with a total length reported at approximately 2,587 kilometres. These voltage levels form the backbone of the national electricity system. ELES's responsibilities therefore encompass more than the physical ownership or administration of lines: they include maintaining network availability, managing system operation and supporting the continuity and security of electricity supply. ELES also operates within the wider European electricity market and infrastructure system. It is a member of the European Network of Transmission System Operators for Electricity, or ENTSO-E. Through this framework, national transmission operators cooperate on technical coordination and the operation of interconnected European power systems. ELES's membership reflects Slovenia's participation in the regional and continental electricity grid rather than an operation limited solely to domestic electrical flows. The company's institutional role expanded substantially in 2023. On 2 October 2023, SODO d.o.o., Slovenia's distribution network company, was merged into ELES. Before that change, ELES was identified primarily with transmission, while SODO represented the distribution-network function. After the merger, ELES became responsible for both electricity transmission and distribution-system operation. The integration consolidated these network-operator responsibilities within a single state-owned company and made ELES a more comprehensive national electricity-grid institution. ELES is headquartered in Ljubljana and remains owned by the Slovenian state. Its activities are infrastructure-oriented and regulated in character, with the company serving as a system operator rather than a conventional electricity retailer or generation company. The available reference material identifies Aleksander Mervar as managing director. In its present form, ELES combines the historical transmission mandate created in 1991 with the expanded distribution-network role acquired through the SODO merger, while continuing to participate in European transmission-operator cooperation through ENTSO-E.

• 2023

  SODO merged into ELES

  [1]Elektro-Slovenijaen.wikipedia.org

  On 2 October 2023, the distribution network company SODO d.o.o. was merged into ELES, giving ELES responsibility for both transmission and distribution-system operation in Slovenia.

• 1991

  ELES founded

  [1]Elektro-Slovenijaen.wikipedia.org

  The Government of Slovenia established Elektro-Slovenija as the country's state-owned electricity transmission company.

State-owned national electricity-grid infrastructure operator

• Electricity transmission · 1991

  Electricity transmission network operation

  ELES operates Slovenia's high-voltage transmission system, including 400 kV, 220 kV and 110 kV lines. The service connects power-system assets within Slovenia and supports the reliable movement and system-level management of electricity across the national grid.

• Electricity distribution · 2023

  Electricity distribution network operation

  Following the merger of SODO d.o.o. into ELES on 2 October 2023, ELES also performs the distribution-system-operator role in Slovenia. This expanded responsibility complements its existing transmission mandate and places both network-operation functions within the same state-owned company.

• Grid coordination

  Cross-border transmission-system coordination

  As Slovenia's transmission system operator and an ENTSO-E member, ELES participates in the coordination of interconnected European electricity systems. This role supports cooperation around cross-border electricity flows and the technical operation of the wider regional grid.

• 2023

  Integration of SODO into ELESM&A

  Background

  Slovenia's electricity-network structure included separate transmission and distribution-system entities, with ELES operating transmission and SODO operating the distribution network.

  Action taken

  Effective 2 October 2023, SODO d.o.o. was merged into ELES.

  Aftermath

  ELES became responsible for both electricity transmission and distribution-system operation in Slovenia.

  Source

1. 1Elektro-Slovenijaen.wikipedia.org