NTPC Green Energy Limited (NGEL), a subsidiary of NTPC Limited, has invited bids for the development of a large-scale Battery Energy Storage System (BESS) with a total capacity of 3200 MWh at the NTPC REL Fatehgarh Solar Plant in Rajasthan. The project will be implemented through an Engineering, Procurement, and Construction (EPC) contract and is expected to strengthen grid reliability while supporting the integration of renewable energy into the power system.
According to the tender notification, the bidding process will be conducted through a domestic competitive bidding route using a single-stage, two-envelope system. This process includes the submission of both techno-commercial and price bids, followed by a reverse auction to determine the successful bidders.
The proposed energy storage capacity has been divided into three separate blocks. Block-1 and Block-2 will each have a capacity of 300 MW/1200 MWh, while Block-3 will have a capacity of 200 MW/800 MWh. The selected developers will be responsible for the complete execution of the project on a turnkey basis, covering design, engineering, supply, transportation, installation, testing, and commissioning of the systems.
The tender requires each battery storage block to be connected directly at the 33 kV level of the designated solar plants. Developers must also ensure that the installed battery capacity is at least 110 percent of the specified energy output requirement to compensate for operational losses during the project lifecycle.
NGEL has outlined strict technical and operational requirements for the project. The BESS must have a design life of 25 years and support daily single-cycle operation. The batteries deployed must be capable of delivering at least 10,000 charge-discharge cycles. In addition, bidders will be required to provide operation and maintenance services for a period of 15 years.
The tender further specifies that the system should maintain a minimum dispatchable capacity of 92 percent at the point of interconnection over the 15-year operational period. Developers will be responsible for any augmentation required to maintain the guaranteed performance levels. The system must also achieve a monthly round-trip efficiency of 80 percent, including auxiliary consumption, and maintain annual availability of at least 98 percent.
The document sale period will begin on June 5, 2026, and close on June 15, 2026. Bid submissions will be accepted until June 25, 2026, with bid opening scheduled on the same day.
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