NTPC Green Energy has issued an engineering, procurement, and construction (EPC) tender to develop battery energy storage systems (BESS) with a cumulative capacity of 130 MW/520 MWh at two thermal power project sites—Ramagundam in Telangana and Sipat in Chhattisgarh.

Bids must be submitted by June 6, 2025. Bids will be opened on the same day.

Bidders can quote for one or both of the following blocks:

• Block-1 consists of a 100 MW/400 MWh BESS at Ramagundam
• Block-2 involves a 30 MW/120 MWh BESS at Sipat

The scope of work entails the design, engineering, packing, forwarding, transportation, unloading, storage, installation, and commissioning of the BESS on a turnkey basis.

The BESS must have an AC discharge capacity measured at the point of injection/metering. The BESS integration will occur at the 33 kV pooling substation of the existing solar power projects at each location.

Selected bidders must grade the site, clear the vegetation, and provide power and water for construction.

The BESS containers must have a minimum DC capacity of 5 MWh. They must include advanced battery and energy management, supervisory control and data acquisition, power conversion, and fire detection and suppression systems. The containers must also include automated controls, battery racks and protection, communication, high and low-tension, auxiliary power, monitoring and control, and firefighting systems.

Successful bidders must provide remote control and monitoring equipment, high-tension transformers, and all other necessary materials and services for trouble-free operation and maintenance. They must also provide comprehensive operation and maintenance services for 15 years.

Successful bidders must conduct site preparation and provide power and water, control and switchgear room installation, and the necessary transformers and substation upgrades to interface with the NTPC grid at 400 kV or 220 kV.

The BESS will be grid-connected and integrated with existing NTPC solar facilities at each location. Each system must deliver one full charge-discharge cycle per day for over 15 years.

The systems must also provide consistent performance, degradation, and efficiency metrics per the International Electrotechnical Commission, Indian Standards, or Institute of Electrical and Electronics Engineers requirements.

Recently, NTPC Renewable Energy floated an EPC tender to develop a 56 MW floating solar project with a 60 MW/240 MWh BESS at NTPC North Karanpura in Chatra, Jharkhand.

In April this year, NTPC Green Energy invited bids for land and an extra-high-voltage transmission system package to develop up to 900 MW interstate transmission system-connected solar projects in Bhuj, Gujarat.