IN Brief:
- SECI's FDRE-IX procurement covers 1.5GW of assured peak renewable supply for four hours.
- NTPC Renewable Energy has confirmed a 500MW award at a discovered tariff of ₹6.00/kWh.
- Developers must combine renewable generation and storage to meet contracted peak-period delivery rather than compete on annual generation alone.
Solar Energy Corporation of India has concluded the e-reverse auction for its latest assured peak renewable power procurement, covering 1.5GW of contracted delivery for four hours from interstate transmission system-connected renewable projects supported by co-located energy storage.
The FDRE-IX tender is defined by SECI as 6,000MWh of assured peak supply, expressed as 1,500MW for four hours. SECI published the request for selection on 5 June 2026, opened bids on 12 August, and the e-reverse auction concluded on 21 August.
NTPC Renewable Energy has confirmed that it secured 500MW of contracted capacity at a discovered tariff of ₹6.00/kWh. The company is a wholly owned subsidiary of NTPC Green Energy and accounts for one third of the total contracted peak capacity available through the procurement.
The award structure matters because this is not a conventional renewable auction built around annual energy production alone. Developers are being selected to provide an assured block of power during a defined peak period, which means generation and storage have to be engineered together around delivery when the system requires it.
SECI’s tender allows renewable generation to be paired with storage rather than prescribing one standard plant configuration. That gives developers room to optimise the balance between wind or solar capacity, stored energy, inverter capacity, and connection capability, provided the finished project can meet the contracted output and other power-purchase requirements.
The four-hour obligation should not be read as an instruction to build a single 1.5GW/6GWh standalone battery fleet. The 6,000MWh figure describes assured peak supply across the procurement, while individual developers remain responsible for deciding how much generation and storage capacity is required to deliver their contracted share reliably.
That design freedom creates several trade-offs. Oversizing renewable generation can improve the probability of having enough energy available to charge storage, while increasing battery capacity can provide more dispatch certainty but raises capital cost, degradation exposure, auxiliary consumption, and replacement requirements.
Connection design is equally important because the projects are required to use India’s interstate transmission system. Transformers, switchgear, protection, metering, communications, plant controllers, and forecasting systems have to coordinate renewable generation, battery charging, and battery discharge without exceeding grid-code or connection limits.
The plant controller becomes particularly important when weather conditions differ from forecast. A project has to decide whether available renewable output should be exported immediately, diverted into storage, or split between the two, while still preserving enough state of charge to meet the contracted peak-delivery obligation later.
Battery degradation adds another constraint. Repeated deep cycling can reduce usable capacity over time, while holding too much energy in reserve can limit access to other revenue opportunities. Developers therefore have to balance warranty conditions, state-of-charge strategy, expected renewable production, and contractual penalties over the life of the asset.
That is the wider significance of firm and dispatchable renewable procurement. As solar and wind account for a larger share of generation, the marginal value of another megawatt increasingly depends on when it is available. Additional midday solar output has less system value if demand is already covered and network capacity is constrained.
A four-hour assured peak product shifts the competitive question from the cost of producing renewable electricity to the cost of delivering it at a more useful time. The tariff therefore includes more than generation: storage losses, additional electrical equipment, control systems, operating risk, and the commercial obligation to deliver during specified periods all sit behind the discovered price.
NTPC Renewable Energy’s ₹6.00/kWh result provides one verified reference point within the auction. The company has confirmed the 500MW award and the 21 August auction conclusion, while SECI’s own tender page confirms the 1.5GW, four-hour procurement framework and the June 2026 tender date.
SECI’s public tender page does not yet provide a complete accessible allocation table for every successful bidder. That limits how far the award breakdown should be taken in publication without additional primary confirmation, but it does not alter the overall engineering requirement attached to the 1.5GW procurement.
For India, the tender adds to a broader move towards renewable projects that can provide scheduled or firmed output rather than simply adding variable generation. That increases demand for storage, forecasting, high-voltage equipment, power electronics, and plant-level controls capable of turning weather-dependent resources into contractually dependable blocks of power.
The next stage for the successful developers will be less straightforward than the auction itself. Contracted megawatts and rupees per kilowatt-hour now have to be converted into physical renewable generation, battery systems, transmission capacity, and operating strategies capable of delivering four hours of assured peak power when required.
