Termoelektrarna Šoštanj (TEŠ) is fully owned by Holding Slovenske Elektrarne (HSE), which is 100% held by the Republic of Slovenia.

[2] In addition to generation of electricity, the operating units provide district heating to the surrounding area, mainly Velenje city and Šoštanj.

The boiler was constructed by Sulzer, the steam turbines by KWU - Kraftwerk Union and electric generator by Siemens.

The boiler was constructed by Benson with NOx-optimized burners, the steam turbines and electric generator by Alstom.

In the case of the commercial availability of CO2 capture technology, the unit has a planned place for the installation of such a device.

[3] Slovenian prosecutors filed charges of corruption and money laundering against two individuals and Alstom in 2020 in connection with TES 6.