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The Solar Energy Corporation of India (SECI) has issued its first Contract for Difference (CfD) tender. It seeks bids from renewable energy (RE) power developers to supply 1,500 MWh (500 MW × 3 hours) of peak power from ISTS-connected projects and has sought bids till May 22, 2026.
SECI‘s latest tender aims to set up ISTS-connected RE Power Project(s) with or without Energy Storage System (ESS). This tender follows the release of formal guidelines by Ministry of New and Renewable Energy’s (MNRE) in March this year for developing 500 MW of CfD-based renewable capacity. Through this initiative, SECI plans to procure the same quantum of assured peak supply on a Build Own Operate (BOO) basis.
The project includes setting up the transmission network up to the interconnection/delivery point. It would then sell electricity from the project on power exchanges at its own cost. The bidders, like parent, affiliate, ultimate parent, or any group company, will be required to submit a single proposal with a minimum contracted capacity of 50 MW and a maximum of 125 MW.
The developer will be required to choose any three hours for energy supply from the project through power exchanges on a day-ahead basis. The supply must fall within the defined peak hours, between 18:00 and 24:00 hours, and within non-solar hours as per the GNA Regulations.
It will also be mandated to sell 3,000 kWh of energy per MW of contracted capacity during peak hours on a daily basis. Additionally, it will sell energy generated from the project daily through power exchanges and schedule supply during peak hours at its discretion, to maximise revenue by selecting the three hours when the Market Clearing Price (MCP) is expected to be the highest.
CfD settlement will be carried out only for energy sold by the RE Power Developer (RPD) in the GDAM, DAM, or RTM segments on power exchanges during peak hours, subject to a maximum hourly quantum of 1 MWh per MW of contracted capacity. The settlement will be based on the difference between the MCP of the respective time block and the strike price (SP).
Any gain or loss arising from this settlement will be adjusted between the RPD and the CfD pool through SECI. If the MCP exceeds the SP, the difference will be paid by the developer to SECI and credited to the CfD pool. Conversely, if the MCP is lower than the SP, the shortfall will be paid to the developer by SECI from the CfD pool to ensure payment at the SP.
The sequence of bidding by the developer on power exchanges will be through the Green Day Ahead Market (GDAM), followed by Order Carry Forward (OCF) to the Day Ahead Market (DAM). Any uncleared or curtailed volume must subsequently be bid in the Real Time Market (RTM).
Additionally, bidders are free to choose ISTS substations for interconnection of the project to the grid, with injection scheduling rights during non-solar hours on a pan-India basis. The tender set the Scheduled Commissioning Date (SCD) for project capacity at 12 months from the CfDA. 
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