SECI Launches India's Largest Battery Energy Storage System in Chhattisgarh

The Solar Energy Corporation of India Limited (SECI) has successfully commissioned India's largest battery energy storage system (BESS) in Rajnandgaon, Chhattisgarh. The 40 MW/120 MWh BESS is coupled with a solar photovoltaic (PV) plant, boasting an installed capacity of 152.325 MW and a dispatchable capacity of 100 MW AC (155.02 MW peak DC).

Representative image

Chhattisgarh will purchase the energy, aiding in meeting the state's peak energy demand with environmentally friendly electricity and fulfilling its renewable purchase obligations.

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This innovative project integrates solar panels and battery storage, representing a significant advancement in renewable energy utilization. Employing bifacial modules that capture reflected light, the system maximizes electricity generation, setting a new standard for large-scale renewable energy projects.

Project Cost and EPC Contractor

The Engineering Procurement and Construction contract was awarded to Tata Power Solar Systems Limited, a wholly-owned subsidiary of Tata Power. The total contract value of the project is approximately USD 114 million (INR 945 crore).

Under the Ministry of New and Renewable Energy, the Solar Energy Corporation of India Ltd. (SECI) commissioned the project. 

The project has been constructed with funding from the World Bank and the Clean Technology Fund under Innovation in Solar Power & Hybrid Technologies Projects, as well as leveraged financing from domestic lending agencies. For further details, refer to our Indian BESS database.

Objectives of the Project

The primary objective is likely to be to integrate large-scale solar energy into the grid while ensuring grid stability. By storing excess solar power during the day and releasing it during peak demand, the BESS aims to regulate grid frequency and voltage, preventing power outages and improving overall grid reliability.

This project serves as a pilot and demonstration for integrating large-scale renewable energy sources like solar and wind into the national grid. Furthermore, it aligns with India's ambitious clean energy targets and aims to reduce dependence on fossil fuels by increasing the share of renewables in the energy mix.

Additionally, the project's large scale and integration with cutting-edge technologies like bifacial solar modules showcase India's commitment to advancement and innovation in the renewable energy sector.

Project Infrastructure

A notable feature of this endeavor is its strategic use of previously unused land. A land-use permission agreement between the Energy Department of the Government of Chhattisgarh, Chhattisgarh State Power Distribution Company Limited (CSPDCL), and SECI turned 451 acres of wasteland in 9 villages in Tehsil Dongargarh and Dongargaon, District Rajnandgaon, Chhattisgarh, into an energy project site.

The power is transmitted through a 132-kilovolt (kV) double-circuit double-string transmission line to the Chhattisgarh State Power Transmission Company Limited's (CSPTCL) 220/132-kilovolt (kV) Thelkadih substation, ensuring stable and reliable electricity supply and seamless integration with the current power grid. 

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