The installed capacity of Santaldih Thermal Power Station is 2 x 250 MW. The four units were commissioned as follows- Unit 1: 1.1.1974; Unit 2: 16.7.1975; Unit 3: 6.12.1978; Unit 4: 30.3.1981.[1]
STPS has expanded capacity by 2 x 250 MW .[1] The previous units (1,2,3,4) are non functional now and they are demolished. Unit 5 & 6 are operating now both are 250 MW. Unit 7 & 8 are proposed to be installed in future. Unit 7 & 8 will be super critical of 800 MW each.