NTPC Renewable Energy (NTPC REL) has invited bids for an engineering, procurement, and construction (EPC) package for a 100 MWh vanadium redox flow battery energy storage system (VRFB BESS) at Khavda Solar Park in Gujarat.

The project involves installing a grid-connected battery system with a rated capacity of 16.7 MW/100 MWh using vanadium redox flow battery technology.

Bids must be submitted by March 10, 2026. Bids will be opened on the same day.

Bidders must furnish an earnest money deposit of ₹20 million (~$220,529). The successful bidders must submit a contract performance security equivalent to 1% of the contract value.

The scope of work includes design, engineering, manufacturing, procurement, construction, testing, commissioning, and comprehensive operation and maintenance for 10 years from the date of successful commissioning of the BESS.

The scope also includes integration with the 33 kV pooling substation and compliance with grid interconnection requirements up to the 400 kV level at the NTPC REL project switchyard.

The selected bidder will be responsible for providing battery management systems, energy management systems, supervisory control and data acquisition systems, power conversion systems, and all civil and electrical works.

The tender outlines multiple qualification routes. Bidders must have experience in designing, manufacturing, and commissioning cumulative VRFB systems totaling at least 2.4 MWh across up to 5 projects over the last 10 years, including at least 1 project totaling 0.4 MWh and operational for 6 months.

Alternatively, they must have experience in executing grid-connected solar or wind projects totaling at least 40 MWAC, including one 10 MWAC project operational for at least six months, or they must have executed an industrial project of at least ₹22.95 billion (~$253.05 million), including at least one 33 kV or higher substation, to qualify with the manufacturer association.

Bidders must have an average annual turnover of at least ₹22.95 billion (~$253.05 million) during the last three financial years and a net worth equal to or exceeding 100% of paid-up share capital.

In November 2025, India’s first MWh-scale vanadium redox flow battery project was commissioned by NTPC at its research and development center, the NTPC Energy Technology Research Alliance, in Greater Noida.

The tender for the project was floated by NTPC in June 2024.