ACME Solar Holdings and Ceigall India have won Rewa Ultra Mega Solar’s auction to develop a 600 MW grid-connected, ground-mounted solar power project with a battery energy storage system (BESS) in the Morena Solar Park, Madhya Pradesh. ACME and Ceigall won 220 MW each at a tariff of ₹2.76 (~$0.0313)/kWh and ₹2.7 (~$0.0306)/kWh, respectively. The tariffs are the lowest ever for a firm and a dispatchable renewable energy project. The tender was floated in September 2024. Winners must develop, operate, and maintain two units each of up to 300 MW of grid-connected ground-mounted solar projects, with BESS, for the supply of 220 MW at any time block and supply of up to 440 MWh during the peak supply period.