During Fortum’s investment programme in Russia, two new combined-cycle gas turbine power units were built on the power plant area.
Unit 1 of Chelyabinsk GRES started commercial operation on 1 December 2015, and unit 2 on 1 March 2016. Both new units’ installed electricity capacity is 247.5 MW and heat capacity approximately 174 MW.
The new units are fully CSA-backed. Prices for capacity under CSA are defined in order to ensure a sufficient return on investments.
Commercial operation of the unit started on November 23, 2017. Unit 3 was needed in order to shut down the plant's 8 obsolete generators. After reconstruction, Chelyabinsk GRES became the largest CCGT combined heat and power plant in the Urals area. In 2018 the plant was renamed Chelyabinsk CHP-4. The plant uses natural gas as fuel.