SECI Concludes 2,000 MW ISTS-Connected Wind Power Auction (Tranche-XX) with Tariffs Starting from ₹3.78/kWh

The Solar Energy Corporation of India (SECI) finalized its e-reverse auction for the Tranche-XX Inter-State Transmission System (ISTS)-connected wind power tender on July 15, 2026. The auction discovered a competitive price floor with tariffs starting from ₹3.78/kWh and reaching ₹3.85/kWh. Early exchange disclosures have confirmed Ayana Renewable Power Private Limited and Powerica Limited among the winners at the ₹3.85/kWh mark. While these entities have publicized their results, the comprehensive roster for the full 2,000 MW allocation is still emerging as more participants fulfill mandatory regulatory filings.

Auction Specifications and Technical Scope

The Tranche-XX tender represents a significant scaling of ambition, ultimately awarding 2,000 MW of capacity despite an initial float of 1,200 MW. This expansion underscores robust developer interest in central intermediary-led auctions.

Technical and Financial Parameters:

• Total Capacity: 2,000 MW.
• Project Model: Build-Own-Operate (BOO) basis with a 25-year Power Purchase Agreement (PPA) duration.
• Bid Limits: Minimum bid size of 50 MW and a maximum of 600 MW per developer to ensure a diverse tier of participants.
• Connectivity: Integration with the Inter-State Transmission System (ISTS) network.
• Developer Obligations: Full responsibility for land acquisition, installation, and securing all requisite grid approvals.
• Tender Fees: A non-refundable document fee of ₹50,000 (plus GST) and a processing fee of ₹20,000 per MW (capped at ₹20 lakh plus GST).
• Security Requirements: An Earnest Money Deposit (EMD) of ₹13.68 lakh per MW, followed by a Performance Bank Guarantee (PBG) of ₹34.20 lakh per MW upon selection.

Analysis of Initial Confirmed Winners

Early disclosures under SEBI (Listing Obligations and Disclosure Requirements) Regulations provide a partial view of the total 2,000 MW allocation.

Ayana Renewable Power Private Limited

Ayana secured 50 MW at the ₹3.85/kWh tariff. The company is a wholly owned subsidiary of ONGC NTPC Green Private Limited, a 50:50 joint venture between NTPC Green Energy Limited and ONGC Green Limited. Notably, NTPC Green Energy Limited is a subsidiary of the state-run power giant NTPC Limited, providing Ayana with substantial institutional backing for its capital-intensive wind portfolio.

Powerica Limited

Powerica Limited successfully bagged 100 MW at the discovered ₹3.85/kWh tariff. This win marks a period of aggressive portfolio expansion for the developer, following its 50 MW win in the Gujarat state tender earlier this month. The company anticipates a formal Letter of Award (LoA) shortly.

Initial Confirmed Tranche-XX Capacity Allocation (Partial List)

Contextual Market Trends and Infrastructure Insights

The Tranche-XX results highlight a widening price gap between state-specific and central ISTS tenders. While this auction saw tariffs as high as ₹3.85/kWh, Powerica’s win in the GUVNL (Gujarat Urja Vikas Nigam Ltd) tender on July 9, 2026, was secured at a considerably lower ₹3.51/kWh. From an infrastructure analyst’s perspective, this variance reflects the increased complexities and costs associated with ISTS-connected projects—which often face higher land costs and inter-state transmission hurdles—compared to state-level specificities.

In the operational sphere, Ayana’s parent group, NTPC Green Energy, continues to strengthen its domestic footprint. On July 8, 2026, its wholly owned subsidiary, NTPC Renewable Energy Limited, commissioned the 50.4 MW Vanki Wind Energy Project in Nakhatrana, Kutch, Gujarat. This addition brought the group’s total installed capacity to 10,721.80 MW. For the newly awarded Tranche-XX projects, developers must maintain a minimum annual Capacity Utilization Factor (CUF) of 22%, a rigorous standard intended to ensure grid stability and project efficiency.

Current Status and Next Steps

The auction’s conclusion triggers a strict 30-day window for successful developers to apply for grid connectivity following the signing of the PPA. SECI will serve as the intermediary, purchasing the generated power for onward sale to various distribution utilities.

As the wind sector navigates fluctuating raw material prices for turbine manufacturing, the industry’s focus shifts to the timely execution of these large-scale orders. Further details regarding the remaining 1,850 MW of capacity and the developers who secured the ₹3.78/kWh floor will be confirmed as companies fulfill their exchange disclosure requirements in the coming days.

Official Sources & Regulatory Disclosures

• NTPC Green Energy Limited: Corporate Disclosure under Regulation 30 of SEBI (LODR) Regulations, 2015 – Press Release: Ayana Renewable Power Private Limited wins 50 MW Wind Project in SECI Wind Tender (Ref. No.: 01: SEC), dated July 15, 2026. View Disclosure (Link to National Stock Exchange of India).
• Powerica Limited: Corporate Announcement regarding winning 100 MW Wind Power Project in SECI Tranche-XX E-Reverse Auction, dated July 15, 2026. View Announcement (Link to BSE Limited).
• Solar Energy Corporation of India Limited (SECI): Request for Selection (RfS) for Selection of Wind Power Developers for Setting up of 2000 MW ISTS-connected Wind Power Projects in India (Tranche-XX), April 2026. View Tender Documents.