Solar Energy Corporation of India Limited (SECI) has issued a Request for Proposals (RfP) dated 04.08.2025 for selecting a supplier for the 600 MW/1200 MWh Battery Energy Storage System (BESS) under the DC Package. The selected bidder will be responsible for design, engineering, manufacturing, testing, supply, installation, commissioning, and 15 years of comprehensive maintenance. The project will be located in Kolimigundla, Nandyal District, Andhra Pradesh, and will interconnect with the Kurnool-3 Substation under the Inter-State Transmission System (ISTS).
The project falls under Tranche 2 of the Market Component of the Central Government’s Viability Gap Funding Scheme, which targets 30 GWh of standalone BESS capacity by 2028. SECI has been allocated 600 MW/1200 MWh capacity under this scheme. Bidding will be conducted through a single-stage, two-envelope system on the ISN-ETS portal. The complete contract will be awarded to a single bidder, including its parent or group companies.
The entire scope includes engineering, testing, and commissioning up to the PCS output terminals. The project has to be supplied within 11 months from the effective contract date and commissioned within 14 months. The pre-bid meeting, bid submission, and techno-commercial bid opening will follow the dates specified on the ISN-ETS portal. The e-reverse auction will be scheduled later.
The bid processing fee is ₹25,000 plus GST. The Earnest Money Deposit (EMD) is ₹4,21,600 per MW and must be submitted as a Bank Guarantee, Payment on Order Instrument, or Insurance Surety Bond. Micro and Small Enterprises (MSEs) are exempt from the RfP cost, bid processing fee, and EMD if they meet the required financial criteria.
The bidder will need to submit a Contract Performance Guarantee of 10% of the contract value, valid for 27 months from the Notice of Award. Payment terms include an optional 10% advance against bank guarantee, 70% against supply and acceptance, 10% for testing and commissioning, and 10% after operational acceptance. Quarterly payments will be made for the maintenance period based on performance.
Commissioning must include pre-commissioning inspections, performance testing, and rectification of any defects. A Defect Liability Period of 12 months will apply, along with a latent defect liability of 5 years. Operational Acceptance will follow successful performance testing and submission of as-built documentation, spare inventory, and approvals.
In case of delays, liquidated damages will be levied at 0.5% per week of the unexecuted value, up to a maximum of 5%. These damages are applicable for delays in both supply and commissioning, and SECI reserves the right to recover such costs or cancel the contract if delays exceed limits.
The selected supplier must ensure timely manufacturing, transportation, testing, commissioning, and maintenance, adhering to the strict timelines and quality standards specified. The proposal includes detailed requirements for packing, forwarding, road transport, insurance, and storage of materials at the site.
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