The Solar Energy Corporation of India (SECI), a public sector undertaking (PSU) under the aegis of the Ministry of New & Renewable Energy, has issued a tender for setting up 500 MW/1,000 MWh standalone battery energy storage systems (BESS) in India.
A first-of-its-kind tender in the country, it will provide Discoms with storage facilities to be used on an on-demand basis.
The tender has been issued under the Standard Bidding Guidelines issued by the Ministry of Power in March 2022.
The total capacity to be set up under the RfS is 1,000 MWh (500 MW x two hours), which will constitute two projects of 500 MWh (250 MW x two hours) capacity each.
The projects will be installed in the vicinity of the Fatehgarh-III Grid-Substation of the ISTS network, in Rajasthan.
The buying entities will be offered the storage capacity to charge and discharge the same daily through RE power, as per their energy shifting requirements.
The projects will be set up on a build-own-operate basis, with the connectivity and necessary permissions being under the scope of the project developer.
The land for the projects will be provided by the CTU to the developers on a right-to-use basis. SECI is the implementing agency of this tender and will be procuring capacity on behalf of the buying entities, charging a facilitation fee in the form of a trading margin.
Out of the total capacity being installed under the tender, 60 percent of the capacity will be off taken by SECI on behalf of the buying entities, and the offtake of 40 percent of capacity will be the responsibility of the developers, through third-party or market sale.
Out of the 60 percent capacity off taken by SECI, 30 percent will be earmarked to be used by NLDC, POSOCO for grid ancillary services.
The developer shall make the BESS available for two operational cycles per day, i.e. two complete charge-discharge cycles per day. The projects are required to demonstrate minimum availability of 95 percent on an annual basis, a minimum Round-Trip Efficiency of 85 percent monthly, and suitable liquidated damages stipulated in case of shortfall in meeting the above criteria.
The term of the projects will be 12 years, with the scheduled commissioning date being 18 months from the date of signing of the battery energy storage purchase agreement (BESPA). Financial closure is to be achieved within 12 months of the signing of BESPA.
The tender marks the first tranche of the government’s immediate target of setting up 4,000 MWh of battery storage capacity as part of achieving increased penetration of RE in the national grid.
The Central Electricity Authority (CEA)/MoP has prepared a report on optimal generation capacity mix for 2029-30.