MoEF&CC that a report by NITI Aayog under the heading "Energy Storage System - Roadmap for India: 2019-2032" (as in the web link below) has deemed it necessary to put batteries as the first choice for most applications; clearly ahead of PSPs. The executive summary of this report says among other things: " ....However, the fast pace of developments taking place in the battery technologies and the consequent price competitiveness have put batteries as the first choice for most applications. Few PHS (or PSP) plants in India (cumulative capacity: 5.7GW) have been identified a long time back, but these projects have not made any progress in the past two decades owing to a variety of issues. Hence, the PHS (or PSP) plants are not considered in this report."
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Energy Storage System-Roadmap for India: 2019-2032
https://www.niti.gov.in/sites/default/files/2019-10/ISGF-Report-on-Energy-Storage-System-%28ESS%29-Roadmap-for-India-2019-2032.pdf