NTPC Renewable Energy (NTPC REL) has invited bids for the engineering, procurement, and construction (EPC) of a 250 MW solar project with a 50 MW/200 MWh battery energy storage system (BESS) in Sitapur, Uttar Pradesh.

The last date to submit bids is February 6, 2026. Bids will be opened on the same day.

Bidders must submit a bid security amount of ₹200 million (~$2.22 million).

The scope of work covers design, engineering, manufacturing, installation, testing, and commissioning of the project.

Successful bidders are responsible for the operation and maintenance of the solar project for three years and 15 years for the BESS.

The project entails site levelling, grading, vegetation clearing, topographical survey, and geotechnical investigation.

It also entails the construction of a pre-engineered inverter room with power conditioning and associated low-tension and high-tension switchgear.  In case string inverters are used, bidders must construct a pre-engineered high-tension switchgear room.

Successful bidders must also develop the extra-high-voltage switchyard.

The project covers all associated electrical and civil works required to connect to the grid and evacuate power to the 33/220 kV switchyard.

The scope includes the construction of internal roads, pathways, drainage system, and the periphery boundary.

The project will be integrated with a supervisory control and data acquisition system to remotely monitor and control the inverters, power plant controllers, and a complete set of weather monitoring stations.

The successful bidders will be responsible for the detailed design, sizing, supply, installation, integration, testing, and commissioning of the BESS.

The BESS must be designed for daily single-cycle operation with a minimum of 10,000 total operational cycles.

Successful bidders must account for actual power transformer losses and transmission line losses of up to 0.25% when sizing the project.

They must guarantee a minimum dispatchable capacity of 92% over 15 years and 100% in the first year.

The BESS must ensure a minimum round-trip efficiency of 80% and a monthly availability of 98%.

The project’s scope will also cover providing reactive power compensation and power quality compliance for the entire solar-plus-storage solution up to the 220 kV grid interconnection point at the Uttar Pradesh Power Transmission Corporation switchyard.

Successful bidders must provide an auxiliary supply system for the BESS project from the 33 kV termination point.

They must also pay the deviation settlement mechanism charges applicable to the project.

Bidders must have designed, supplied, erected, or supervised the erection, and commissioned or supervised the commissioning of grid-connected solar power projects with a cumulative installed capacity of at least 40 MWp. Of this, at least one project must be at least 10 MWp. The projects must have been operational for at least six months.

Alternatively, they must have developed solar projects of a cumulative capacity of at least 40 MWp. At least one of the projects must be of 10 MWp. The project must have been in operation for at least six months before the techno-commercial bid opening date.

Bidders can also be a developer or EPC contractors who have completed an industrial project in the area of power, steel, oil and gas, petro-chemical, fertilizer, cement, coal mining, including a coal handling plant, and/or any other process industry of a value of at least ₹2.36 billion (~$26.2 million) in the last ten years. The project must have been operational for at least one year in the non-renewable energy sector and for six months in the renewable energy sector.

Additionally, they must have executed at least one electrical substation of at least 33 kV, consisting of equipment such as 33 kV circuit breakers and power transformers. If the project falls under the non-renewable energy sector, it must have been operational for at least ayear. The reference projects in the renewable energy sector must have been operational for at least six months.

Bidders must have a minimum annual turnover of ₹2.36 billion (~$26.2 million) in the last three financial years.

They must have a net worth of at least 100% of the bidder’s paid-up share capital.

In August 2025, NTPC REL invited bids for the EPC of a 300 MW grid-connected solar project anywhere in Goa.

In the same month, NTPC Green Energy issued an EPC expression of interest to set up 5 MW ground-mounted solar projects, a 4 MW/12 MWh BESS, and a floating solar project of up to 20 MW on Great Nicobar Island.