Rewa Ultra Mega Solar Limited (RUMSL), a public solar developer in India, has launched a tender for two solar-plus-storage projects aimed at ensuring power supply during peak demand periods.

The two projects have contracted capacities of 50MW and 200MW respectively. While generating solar power during the daytime, they will supply peak-period power to the state grid for four hours and six hours respectively.

RUMSL highlighted that these tenders mark India’s first “truly technology-agnostic” solar-plus-storage projects, permitting developers to adopt battery energy storage systems (BESS), pumped storage projects (PSP) or other storage technologies anywhere in India.

The projects are designed to maintain consistent power supply during both solar generation hours and peak demand periods, which helps optimize the utilization of transmission capacity. Developers can choose to locate project components either inside or outside a designated solar park: RUMSL will provide land and evacuation infrastructure connected to the state transmission utility (STU) for in-park projects, while developers of off-park projects need to arrange land and transmission infrastructure on their own.

For projects connected to the inter-state transmission system (ISTS), transmission charges and losses will be included in bids to facilitate fair comparison based on the landed tariff at the state grid boundary, RUMSL added.

The initiative builds on the state’s prior experience with the Morena solar-plus-storage project, as well as the Rewa and Agar-Shajapur-Neemuch (ASN) solar projects that achieved record-low tariffs. RUMSL noted that the new projects could lay the foundation for future developments capable of providing 24-hour flat power output.