NTPC Green Energy Limited Invites Bids for 800 MW/3200 MWh BESS Project at Khavda Solar Park

NTPC Green Energy Limited, a wholly owned subsidiary of NTPC Limited, has issued an abridged invitation for bids for the development of a large Battery Energy Storage System (BESS) project at its Khavda Solar Project in Gujarat. The company plans to develop an 800MW/3200MWh grid-connected BESS facility under a domestic competitive bidding process. The tender has been floated on a Single Stage Two Envelope basis, where bidders will first submit techno-commercial bids followed by price bids. Eligible participants will later take part in a reverse auction process.

According to the tender notice, the BESS project will be developed at the PSS-1 location of the NTPC REL Khavda Solar Project in Gujarat. The storage system capacity has been defined as the rated AC discharge capacity available at the Point of Injection (POI) at the ISTS substation. The tender document clearly states that bidders must consider auxiliary consumption during discharge operations while meeting the required output capacity.

The company intends to finance the project through its own resources or through borrowings. Detailed bidding documents and the official invitation for bids are scheduled to be made available for public viewing and download from May 25, 2026, through the official NTPC tender portals.

The selected bidder will be responsible for executing the project on a complete turnkey basis. The scope of work includes design, engineering, manufacturing, supply, transportation, installation, testing, and commissioning of the BESS system. In addition, the bidder will also be responsible for integrating the storage system with the Balance of System infrastructure, solar plants, and the power grid.

The tender outlines several strict technical and operational requirements for the project. The BESS system must be designed for a life span of 25 years while operating under a daily single-cycle charging and discharging pattern. The batteries supplied for the project must support at least 10,000 operating cycles. The system is also required to maintain a minimum monthly Round Trip Efficiency of 80%, including auxiliary consumption measured at the termination point.

Further, the selected developer must guarantee an annual system availability of 98%. The dispatchable capacity of the system should not fall below 92% during a 15-year operational period. To ensure long-term performance, the tender also includes a comprehensive 15-year Operation and Maintenance agreement along with warranty obligations and service-level commitments.

The bidder will additionally be responsible for conducting grid compliance studies and power quality analysis for the integrated system. The design must also account for standby auxiliary consumption during non-solar hours and emergency supply requirements in case of grid failure. The terminal point for the assignment has been defined up to the integration with the owner’s 33 kV pooling switchgear.

While the abridged tender document highlights major technical specifications and timelines, it does not disclose the Earnest Money Deposit or Performance Bank Guarantee amounts. These details are expected to be provided in the detailed bidding documents that will be released later this month.