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The Šoštanj Thermal Power Plant is a limited company, with Holding Slovenske elektrarne as the sole partner. The company is under the management of the Director.

The company's principal activity is generation of electricity and district heating energy.

With an installed power of 684 MW, the Šoštanj Thermal Power Plant generates, on average, one third of the energy in the country, and in periods of crisis, it can cover  more than one half of the national demand. The average annual electricity production ranges from 3,500 and 3,800 GWh. The average annual production of thermal energy used for district heating in the Šaleška dolina valley amounts to 400-450 GWh.

To achieve the above-mentioned annual production of electricity and thermal energy, the power plant uses between 3.5 and 4.2 million tonnes of coal and approximately 60 Sm3 of natural gas.

The results of operational readiness of our generators can be compared to the best European thermal power plants.

Unit Generator nominal power
Unit 1 Permanently closed down on 31.march 2010
Unit 2 Permanently closed down in 2008
Unit 3 Permanently closed down in 2014
Unit 4 July 6th, 2018 - Permanent shutdown of Unit 4
Unit 5 345 MW
Gas units 2 x 42 MW

According to the adopted strategic development plan of the Šoštanj Thermal Power Plant, the 600 MW Unit 6 will gradually replace the technologically obsolete and economically inefficient Units 1, 2, 3, 4 and 5.

It is a project of national importance which has been included in the Resolution on the National Energy Programme and the Resolution on the National Development Projects for the 2007-2023 Period adopted by the Government of the Republic of Slovenia on 12th October 2006 and amended in the year 2008. In spring 2009, it was also included in the Green Paper.

Unit 6 will consume approximately 30 percent less coal for the same amount of generated energy, resulting in significantly lower total emissions into the environment. At the same amount of generated energy, 30 percent less CO2 will be emitted into the environment from Unit 6 compared to the present units of the Šoštanj Thermal Power Plant.

With the construction of Unit 6, we will reduce the level of environmental pollution, improve the quality and energy efficiency, and provide an opportunity for the power plant to achieve compliance with international standards on best available technology.