CESC awards 600 MW ISTS hybrid capacity at Rs 3.74–3.75/kWh

Calcutta Electric Supply Corporation (CESC) has announced the results of its tender for 600 MW of interstate transmission system (ISTS) connected wind-solar hybrid power projects. The capacity has been awarded to four bidders at tariffs ranging from Rs 3.74 to Rs 3.75 per kWh.

According to the tender results, Vismaya Renewables India Project secured 100 MW at a tariff of Rs 3.74 per kWh. Hexa Climate Solutions and Sprng Energy each secured 100 MW at a tariff of Rs 3.75 per kWh, while Purvah Green Power was awarded the remaining 300 MW at the same tariff. The projects will be developed under a build-own-operate (BOO) model at multiple locations across India.

The tender scope covers development of wind-solar hybrid projects, establishment of the transmission network up to the interconnection point, land identification, project installation and ownership, and obtaining all required approvals. The wind and solar components may be located at the same site or at separate locations.

Projects are required to be designed for interconnection with the ISTS network at a minimum voltage level of 220 kV. The tender specifies that the wind-to-solar capacity ratio should be at least 2:1.

CESC will execute 25-year power purchase agreements (PPAs) with the selected bidders. The tender was originally issued in November 2025.

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