NTPC Renewable Energy Limited (NTPC REL), a wholly owned subsidiary of NTPC Green Energy Limited, has invited bids for the engineering, procurement, and construction (EPC) of a 250 MW ground-mounted solar photovoltaic power project integrated with a 50 MW/200 MWh Battery Energy Storage System (BESS) in Sitapur, Uttar Pradesh.
The company has issued an Invitation for Bids (IFB) for the project through a domestic competitive bidding process following a single-stage, two-envelope system, after which a reverse auction will be conducted to identify the successful bidder. The IFB was issued on December 31, 2025. Bidding documents will be available from January 7 to January 21, 2026, and a pre-bid conference is scheduled for January 23, 2026. The deadline for bid submission is February 6, 2026, at 15:00 hours, with techno-commercial bids to be opened the same day at 15:30 hours.
The scope of work covers the complete execution of the solar power plant, including design and engineering, procurement and supply of solar PV modules, installation, testing, and commissioning. Civil works under the project include site grading and levelling, vegetation clearing, topographical survey, geotechnical investigation, construction of pre-engineered inverter rooms, and development of the extra-high-voltage (EHV) switchyard required for grid connectivity. The solar plant will use a fixed-tilt mounting system. The contractor will also be responsible for internal roads, drainage systems, boundary fencing, and all electrical and civil works necessary for power evacuation up to the 33/220 kV switchyard.
In addition to the solar plant, the project includes the design, supply, installation, integration, testing, and commissioning of a 50 MW/200 MWh BESS. The battery system must be designed for daily single-cycle operation, with a minimum of 10,000 charge-discharge cycles and a design life of 25 years. The BESS must ensure a minimum round-trip efficiency of 80%, monthly availability of 98%, and a minimum dispatchable capacity of 92% over 15 years, with 100% dispatchability in the first year. The system will be integrated with a supervisory control and data acquisition (SCADA) system for remote monitoring and control and must comply with grid power quality and reactive power requirements up to the 220 kV interconnection point.
Operation and maintenance responsibilities form a key part of the contract. The successful bidder will be required to provide operation and maintenance services for the solar power plant for three years, while O&M for the BESS will extend for 15 years, ensuring long-term performance and reliability of the assets.
Interested bidders must meet defined technical and financial eligibility criteria. Technically, bidders should have commissioned at least 40 MWp of grid-connected solar projects, including one project of at least 10 MW that has been operational for a minimum of six months. Alternatively, bidders may qualify if they have executed an industrial project valued at least ₹236 crore in sectors such as power, steel, oil and gas, cement, or mining within the last ten years, along with experience in executing electrical substations of at least 33 kV. Financially, bidders must have an average annual turnover of at least ₹236 crore over the previous three financial years and a net worth not less than 100% of their paid-up share capital.
All bids must be accompanied by a bid security of ₹20 crore, failing which the bid will be considered non-responsive. NTPC REL has clarified that the cost of bidding documents is nil.
The project is part of NTPC REL’s broader strategy to expand large-scale renewable energy and energy storage capacity in India, supporting grid stability and the country’s transition toward clean and reliable power generation.
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