Follow India Renewable Energy News on WhatsApp for exclusive updates on clean energy news and insights
CESC Issues Tender for 600 MW ISTS-Connected Wind–Solar Hybrid Projects
Nov 28, 2025
CESC has invited bids to develop 600 MW of ISTS-connected wind–solar hybrid projects through a tariff-based competitive bidding process. The deadline for bid submission is January 19, 2026.
Under the scope of the bidder, responsibilities include land identification, project installation, ownership, obtaining all necessary approvals, and establishing interconnection with the ISTS network to supply power to CESC.
Bidders are required to pay a tender document fee of Rs 29,500 and a bid processing fee of Rs 5 lakh plus GST. Additionally, an earnest money deposit (EMD) of Rs 20 lakh per MW must be furnished.
Selected bidders must submit performance guarantees of Rs 23.55 lakh per MW for the solar component and Rs 32.45 lakh per MW for the wind component. Techno-commercial bids will be opened on January 20, 2026.
The tender specifies a minimum contracted capacity of 50 MW and a maximum allotment of 300 MW per bidder, with capacity increments allowed only in multiples of 50 MW. CESC will sign 25-year power purchase agreements (PPAs) with the successful bidders.
For equipment compliance, bidders must use type-certified wind turbine models listed under the Approved List of Models and Manufacturers (Wind). Solar modules must appear in ALMM List-I, and the cells used must be included in ALMM List-II. The declared annual Capacity Utilisation Factor (CUF) must remain at or above 50% throughout the PPA period. Developers must also install and maintain GPS-enabled Automatic Weather Stations (AWS).
Financial eligibility requires a minimum net worth of Rs 94.20 lakh per MW for solar and Rs 129.80 lakh per MW for wind, as of the last day of FY25 or within seven days before the bid submission deadline. Bidders must also demonstrate a minimum annual turnover of Rs 90.20 lakh per MW, and an internal resource generation capability (PBDIT) of Rs 18.04 lakh per MW, based on the same financial timeline.