NTPC Invites Bids for 4,000 MWh Battery Energy Storage Project Across Thermal Stations

NTPC Ltd. has issued an Invitation for Bids (IFB) for the engineering, procurement, and construction (EPC) of a 4,000 MWh Battery Energy Storage System (BESS) at its thermal power stations under domestic competitive bidding.

The project will be implemented in two parts, 300 MW/1,200 MWh and 1,400 MW/2,800 MWh, spread across 11 locations, with interconnection points at 400 kV, 220 kV, or 132 kV. The BESS is designed for a 12-year service life with two full charge-discharge cycles per day, and will include a 12 years of Comprehensive Annual Maintenance Contract (CAMC) in the scope.

Technical features outlined by NTPC include a battery system with integrated Battery Management System (BMS), Energy Management System (EMS), SCADA, power conversion systems, protection and communication infrastructure, auxiliary power systems, and fire safety systems. The storage units will be integrated with existing thermal plant facilities and must maintain rated capacity at commissioning and through the first year of operation, with defined allowances for annual degradation in discharge capacity and efficiency.

Bidding documents will be available from August 19, 2025, on NTPC’s e-procurement portals. The tender follows NTPC’s broader push into large-scale energy storage to enhance grid stability as renewable penetration increases.