Coal India (CIL) has invited expressions of interest (EoI) for the engineering, procurement, and construction (EPC) of 2,000 MW interstate transmission system (ISTS)-connected wind projects across India.

Bids must be submitted by September 16, 2025. Bids will be opened on the same date.

Bidders can quote for capacities ranging from 100 MW to 2,000 MW. The projects are planned in states with substantial wind resources, including Andhra Pradesh, Tamil Nadu, Karnataka, Rajasthan, and Madhya Pradesh. The final locations will be identified based on wind energy yield potential and proximity to the ISTS grid network.

The scope of work includes the design and engineering, micro-siting, manufacturing, supply, erection, testing, and commissioning of the solar projects. It also involves proving guaranteed performance parameters.

Selected bidders must supply and install wind turbine generators (WTGs), unit substations, and supervisory control and data acquisition systems. They must also complete civil works such as internal roads, office-cum-control buildings, pooling substations, storage sheds, permanent water supply systems, and approach roads.

The scope of work also covers electrical works, including the development of internal high-tension overhead lines, metering stations, extra high voltage substations with necessary switchgear, and external overhead lines up to the ISTS grid substation.

The wind projects must be connected to a nearby ISTS substation, with provisions for bay extension or additional facilities at the grid substation.

The wind farms must achieve a minimum capacity utilization factor of 35%.

Only WTGs listed under the Revised List of Models and Manufacturers must be used. The turbine generator capacities can range from 1 MW to higher sizes available in the market.

Recently, CIL floated an EoI for the EPC of 150 MW ISTS-connected solar projects with a co-located battery energy storage system.

In May this year, CIL invited EoIs from potential buyers to purchase power at a fixed tariff from its 4.5 GW renewable energy projects, with delivery at the nearest interconnection point of the interstate transmission system network.

Last December, CIL invited EoIs for developing a 1,000 MW grid-connected solar power project in Rajasthan Rajya Vidyut Utpadan Nigam’s solar park in Pugal, Rajasthan.

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