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Bihar Commissions 132 kV Transmission Line and 100 MVA Transformer at Kajra Solar-BESS Project
Dec 31, 2025
Bihar has taken a major step in strengthening its renewable energy infrastructure with the successful energisation of a 132 kV transmission line and a 100 MVA, 33/132 kV power transformer at the Kajra Solar Power Plant in Lakhisarai district. The large-scale project, which integrates solar generation with battery energy storage, represents an investment exceeding Rs 2,800 crore.
The energisation work was completed under the close supervision of Bihar State Power Generation Company Ltd. (BSPGCL) and Bihar State Power Transmission Company Ltd. (BSPTCL), according to Manoj Kumar Singh, Secretary of the Energy Department and Chairman-cum-Managing Director of Bihar State Power Holding Company Ltd.
To enable efficient evacuation of power from the plant, new transmission lines have been commissioned connecting the Grid Sub-stations at Haveli Kharagpur and Lakhisarai. In parallel, the 100 MVA transformer installed at the Kajra facility has also been brought into operation, ensuring seamless transmission of electricity to the state grid and reliable supply to consumers.
Calling the development a significant milestone for Bihar’s clean energy push, Manoj Kumar Singh said the project would play a vital role in improving grid stability and ensuring round-the-clock power availability. He added that the integrated battery energy storage system would allow the plant to supply uninterrupted electricity for four to five hours during peak demand periods.
Officials from BSPGCL noted that the Kajra Solar Power Plant ranks among India’s largest solar projects equipped with battery storage, and its commissioning is expected to substantially increase Bihar’s green power output.
The project is being implemented in two phases. Phase I comprises a 185 MW solar installation paired with a 254 MWh battery energy storage system, developed at an estimated cost of Rs 1,810 crore. Phase II, which is currently under construction, includes a 116 MW solar plant supported by a 241 MWh battery storage system, with an investment of around Rs 1,055 crore and a targeted completion date of January 2027.
Upon completion of both phases, the Kajra Solar Power Plant will have a total installed solar capacity of 301 MW and a combined battery storage capacity of 495 MWh, positioning Bihar as a key player in large-scale renewable energy and energy storage deployment in India.