FDRE explained: how firm renewable power is rewriting India's tenders

In 50 words: Firm and Dispatchable Renewable Energy (FDRE) bundles solar, wind and batteries into one contract that delivers power on a fixed schedule, not whenever the sun shines. Since India's June 2023 guidelines, agencies have auctioned about 14 GW of FDRE and round-the-clock capacity at tariffs of ₹4.69–₹6.74/kWh; the first project began commissioning in 2026.

For a decade, buying renewable power in India meant buying whatever the weather delivered. A distribution company (discom) signed up for a solar plant's output and took the power when it came — a flood at noon, nothing at 8 PM. That model built 100-plus gigawatts of solar and wind, but it left the hardest problem untouched: the evening peak, when demand is highest and the sun is gone. India's answer is a new procurement structure called Firm and Dispatchable Renewable Energy, or FDRE. Instead of buying raw generation, the discom specifies the shape of the power it wants across the day, and the developer engineers a solar-wind-battery bundle to deliver exactly that shape. This explainer walks through what FDRE is, how it differs from round-the-clock and peak-power tenders, what tariffs the auctions have discovered, and why roughly 90% of India's recent renewable awards now carry a storage or firmness obligation.

What FDRE actually is
Why India needed it: the duck curve and the 256 GW peak
The rulebook: MNRE's 2023 guidelines and how they work
FDRE vs RTC vs peak power: the three firm structures
What the auctions have discovered: an FDRE tariff league table
The first project on the ground
The economics and the risks
Frequently asked questions
What to watch next

1. What FDRE actually is

FDRE is a contract for firm, schedulable renewable power. The buyer — usually a discom, buying through a central nodal agency such as SECI, NTPC, SJVN or NHPC — publishes a demand profile in the tender: how many megawatts it needs in each block of the day. The developer must then build a project, almost always a combination of solar plus wind plus a battery energy storage system (BESS), sized so that it can meet that profile with high reliability across a 25-year power purchase agreement (PPA).

The industry shorthand for the shift is "load following": the buyer gets what it wants, not what the resource happens to offer. That inverts the old bargain. In a plain solar PPA, the discom absorbs the intermittency risk. In an FDRE PPA, the developer owns that risk — it over-builds generation and adds storage so that a cloudy afternoon or a windless week does not breach the contract. The performance is policed by a single number, the Demand Fulfilment Ratio (DFR), which the developer must hold above a floor every month or pay penalties.

Crucially, FDRE is technology-agnostic on the supply side. The guidelines let the developer choose the mix and the storage technology — lithium-ion BESS, pumped hydro, or any combination — as long as the delivered profile is met. That freedom is why FDRE has become the vehicle pulling India's battery build-out forward: to firm up variable renewables at scale, developers need hours of storage, and FDRE tenders are where that storage gets contracted.

2. Why India needed it: the duck curve and the 256 GW peak

India's grid stress is no longer a daytime story. On 25 April 2026 the country set a record instantaneous peak of about 256 GW — and the shortfall did not appear at noon. Daytime demand was met comfortably because solar was flooding the grid; the gap opened after sunset, with a shortfall of roughly 4–5 GW recorded around 10:30 PM on the hottest evenings. This is India's version of the "duck curve": solar collapses the midday net load, then the grid must ramp fossil generation violently upward as the sun sets into the evening peak. Grid operators now cite evening ramp requirements of up to 500 MW per minute.

The scale of what is coming makes the problem structural. The Central Electricity Authority (CEA) projects peak demand rising to about 459 GW by FY2035-36, with the generation portfolio expanding to over 1,100 GW dominated by roughly 509 GW of solar. More solar deepens the duck curve. Yet India has deployed only around 6 GW of battery storage so far. Firming that mismatch is precisely what FDRE and its cousins are engineered to do: they force storage into the contract, so every new tranche of renewable capacity arrives already shaped to serve demand rather than adding to the midday glut.

3. The rulebook: MNRE's 2023 guidelines and how they work

The legal foundation is the Ministry of Power's "Guidelines for Tariff Based Competitive Bidding Process for Procurement of Firm and Dispatchable Power from Grid Connected Renewable Energy Power Projects with Energy Storage Systems," first notified on 9 June 2023 and since amended on 17 November 2023, 2 February 2024, and 12 February 2025. The guidelines standardise the bidding documents so that deviations need regulatory approval, which is what lets tariffs move quickly from auction to CERC adoption to signed PPA.

The core mechanics that every FDRE tender inherits:

Demand-following schedule. The developer schedules power against a pre-fixed demand profile set by the buyer, communicated in the tender.
Demand Fulfilment Ratio (DFR). The developer must maintain a minimum DFR — commonly 90% on a monthly basis for load-following tenders — or face penalties, typically priced at around 1.5x the PPA tariff on the shortfall energy.
Developer-chosen storage. The choice of energy-storage technology and the generation mix sits entirely with the developer.
25-year fixed tariff. A single tariff applies for the full project tenure, giving the discom price certainty.
Excess-energy freedom. Power generated above the contracted schedule can generally be sold to third parties or on the exchanges, improving project economics.

The February 2025 amendment tightened default provisions — a generator that fails to maintain the declared minimum capacity utilisation factor (CUF) for two consecutive years can be held in default — signalling that regulators intend firmness obligations to bite, not sit on paper.

4. FDRE vs RTC vs peak power: the three firm structures

"Firm renewable" is not one product. Nodal agencies now run three overlapping structures, and the differences in performance obligation drive the differences in tariff. This is the distinction most existing explainers skip, so it is worth laying out precisely.

| Feature | FDRE (load-following) | FDRE (peak) | Round-the-clock (RTC) | |---|---|---|---| | What the buyer specifies | A full 15-minute demand curve across the day | Assured supply in a defined peak window (about 4 hours) | A high, near-flat supply across all hours | | Key performance metric | Monthly DFR (commonly ~90%) | ~40% CUF plus ~90% availability during peak hours | Monthly/annual DFR (about 75%/80%), ~90% in peak | | Storage intensity | High — sized to reshape the whole day | Moderate — concentrated in the peak block | Highest — must firm output around the clock | | Typical use case | Matching a discom's actual daily load shape | Covering the costly evening ramp specifically | Replacing baseload/thermal-mimic supply | | Indicative tariff band (2024-26) | ₹4.69–₹5.00/kWh | ₹6.27–₹6.74/kWh | ₹4.82–₹5.07/kWh |

The logic is that the harder and more concentrated the firmness obligation, the more storage the developer must install per unit of energy actually sold, and the higher the tariff. Peak-only FDRE tenders look expensive per kWh precisely because the developer sells a small, storage-heavy sliver of energy at the most valuable hours. RTC and load-following FDRE spread the storage cost across far more delivered energy, so their per-unit tariffs land lower. A related tender family, "thermal-mimic" RTC — SECI issued a 1,000 MW round-the-clock thermal-mimic tender in March 2026 — pushes this furthest, asking renewables plus storage to behave like a conventional plant.

5. What the auctions have discovered: an FDRE tariff league table

Since 2023, central and state agencies have auctioned close to 14 GW of combined RTC and FDRE capacity, with a large share now under construction. The table below collects the discovered tariffs from the most significant rounds — the concrete price signal that the abstract explainers omit.

| Tender | Capacity | Discovered tariff | Winners / procurer | Structure | |---|---|---|---|---| | SECI FDRE-IV | 630 MW | ₹4.98–₹4.99/kWh | Vena, Hero, JSW Neo, Hexa, Serentica → Delhi BSES discoms | Load-following FDRE | | NTPC FDRE (part of 7,660 MW scheme) | 760 MW | ₹4.69–₹4.70/kWh | Hexa, ACME Solar, Avaada | FDRE | | SECI RTC | 420 MW | ₹5.06–₹5.07/kWh | Hero, Hexa, Sembcorp, Jindal India Power | Round-the-clock | | SJVN RTC | — | ₹4.82–₹4.91/kWh | — | Round-the-clock | | SECI FDRE-VII (peak) | 1,200 MW / 4,800 MWh | ₹6.27–₹6.28/kWh | Adyant Enersol, ACME (301 MW), Serentica (600 MW), AMPIN (199 MW) | Peak FDRE | | SJVN peak | — | ₹6.74/kWh | — | Peak FDRE |

Two patterns stand out. First, load-following FDRE and RTC tariffs have converged into a roughly ₹4.70–₹5.10/kWh band — a remarkable outcome given that these contracts deliver firm, schedulable green power that competes directly with new thermal. Second, the CERC adoption process is now routine: the regulator adopted tariffs for 1,180 MW of RTC and FDRE capacity (the SECI RTC and NTPC FDRE rounds above) in a single order dated 27 November 2025, confirming that firm-renewable price discovery has moved from novelty to plumbing.

The tariffs sit on top of a booming storage market. India's cumulative energy-storage pipeline reached about 224 GWh in 2025, with roughly 102 GWh of tenders issued that year alone; standalone BESS has become cheap enough that two-hour systems have cleared at ₹1.48–₹2.54 lakh/MW/month with viability-gap funding. FDRE rides that cost curve — cheaper batteries are what let firm-renewable tariffs stay near ₹5/kWh.

6. The first project on the ground

For all the auctioned gigawatts, FDRE only became real when a project started delivering. That milestone arrived in 2026: Juniper Green Energy began commissioning what is billed as India's first FDRE project, built under an SJVN tender. The bundle combines about 259 MWp of solar, 280 MW of wind and 200 MWh of battery storage across sites in Rajasthan and Gujarat, feeding a 200 MW PPA that SJVN on-sells to Haryana's power procurement centre. The solar component energised around March 2026 and the storage around April 2026.

The Juniper project is a template for what the pipeline will look like physically: geographically split generation (solar in one resource-rich state, wind in another) stitched to storage and a single firm contract. With over 10 GW of FDRE reported under construction, the sector's near-term test is executional — commissioning these multi-technology, multi-site projects on time and hitting the DFR from day one.

7. The economics and the risks

FDRE's appeal to a discom is straightforward: a single 25-year fixed tariff for power shaped to demand, no separate storage tender, no intermittency risk on the buyer's books, and a green alternative to signing new coal PPAs. For the developer, the excess-energy sales and the ability to arbitrage stored power on the exchanges sweeten a project that would otherwise be a thin-margin firmness contract.

But the structure concentrates risk on the developer, and three pressures are worth watching:

Battery cost and supply exposure. FDRE economics live or die on storage capex. A swing in lithium-cell prices, cell-import duties, or domestic-content rules can turn a winning bid underwater before commissioning — analysts have flagged this as an existential squeeze on aggressive FDRE and RTC bids.
Execution complexity. Coordinating solar, wind and storage across multiple states, transmission connections and a strict DFR is far harder than building a single solar farm. Slippage risks penalties.
PSA lag. Tariffs get discovered and CERC-adopted, but the back-to-back power sale agreements with discoms can lag, delaying financial close — several 2025 rounds sat with PSAs pending.

None of these has derailed the model. FDRE, RTC and solar-plus-storage together made up roughly 90% of renewable capacity awarded in the first eight months of FY2026 — the clearest evidence that India's procurement default has shifted from "cheap and variable" to "firm and dispatchable."

8. Frequently asked questions

What does FDRE stand for? Firm and Dispatchable Renewable Energy. It is a tender and contract structure in which a developer supplies renewable power on a pre-agreed schedule using a mix of generation and energy storage, rather than delivering variable output whenever the resource is available.

How is FDRE different from a normal solar tender? In a normal solar tender the discom takes whatever the plant generates and bears the intermittency. In an FDRE tender the discom specifies a demand profile, and the developer must meet it — bearing the firmness risk and being measured on a Demand Fulfilment Ratio.

What is the Demand Fulfilment Ratio (DFR)? The DFR is the share of the buyer's scheduled demand that the project actually supplies. Load-following FDRE tenders commonly require a minimum monthly DFR of around 90%; shortfalls attract penalties, often about 1.5x the PPA tariff on the missed energy.

What tariffs has FDRE achieved in India? Load-following FDRE and RTC rounds have cleared roughly ₹4.69–₹5.10/kWh, while peak-only FDRE has cleared higher, around ₹6.27–₹6.74/kWh, because it is more storage-intensive per unit of energy sold.

How much FDRE capacity has India tendered? Central and state agencies have auctioned close to 14 GW of combined RTC and FDRE capacity since the 2023 guidelines, with over 10 GW reported under construction.

Which agencies run FDRE tenders? Primarily the central nodal agencies SECI, NTPC, SJVN and NHPC, which bundle discom demand and sign PPAs, then pass power through to state discoms via power sale agreements.

9. What to watch next

Three things will define whether FDRE delivers on its promise. First, commissioning performance — whether the Juniper project and the wider 10 GW under construction hit their DFR obligations in real operation, not just on paper. Second, tariff direction — if battery cell prices keep falling, load-following FDRE could push below ₹4.50/kWh and undercut new thermal outright; if cell costs or import duties spike, aggressive bids could unravel. Third, the peak-power segment — whether concentrated evening-peak FDRE tenders attract enough bidders at ₹6-plus/kWh, given that SECI's peak rounds have at times been undersubscribed. FDRE has already become India's default way to buy renewable power; the next two years decide whether it becomes India's default way to build a reliable, low-carbon grid.

This analysis was researched and drafted with AI assistance and edited by a named member of the Earth Energy Log editorial team. Figures are attributed to the primary and trade sources listed above; discovered tariffs reflect publicly reported auction results and CERC adoption orders and may be revised as power sale agreements are finalised. See our editorial standards and AI disclosure. Explore more on policy and battery storage, and see our coverage of India in the regions hub.

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