Inside SECI’s FDRE-IX Tender: India’s Largest Battery Storage Bid Yet
Category: Battery Energy Storage & Grid Firming
The headline numbers: SECI’s FDRE-IX (Firm and Dispatchable Renewable Energy) tender, launched in mid-2026, sought 1,200 MW of renewable generation capacity co-located with 4,800 MWh — 4.8 GWh — of battery storage, making it one of the largest battery storage tenders floated in India to date.
What “firm and dispatchable” actually requires: Unlike a standard solar or wind auction, where developers are paid for whatever they generate, an FDRE tender requires the winning developer to guarantee a specific amount of power delivery during defined peak-demand windows, with four-hour continuous discharge capability built into the storage requirement. To enforce this, the tender structure includes a real financial penalty — a 1.5x charge applied to any shortfall beyond a 10% delivery tolerance — which shifts meaningful risk onto the developer if the storage system underperforms or the renewable generation feeding it comes up short.
The “green charging” rule: A structural requirement of the tender is that batteries can only be charged from renewable sources; charging from the conventional grid disqualifies that stored energy from counting as green output when discharged. This closes a loophole that would otherwise let a developer cheaply charge batteries off coal-heavy grid power overnight and still sell the discharged electricity as renewable.
Why this tender structure matters beyond its own capacity: Requirements like co-location at a single grid connection point, mandatory renewable-only charging, and steep underperformance penalties raise the bar for developers bidding into these tenders — effectively filtering out speculative or thinly capitalized bidders in favor of players who can actually engineer and finance long-duration storage at scale. Tenders like this are pushing India’s BESS market toward more advanced, liquid-cooled, high-capacity storage systems rather than smaller-scale battery installations, since 4-hour discharge at this scale requires meaningfully different engineering than short-duration frequency-regulation storage.
The broader storage buildout: FDRE-IX sits within a fast-growing pipeline of Indian battery storage tenders; industry estimates put India’s overall BESS project pipeline at roughly 92 GWh working through the market by the early 2030s, alongside the 3,200 MW of solar-plus-storage capacity SECI separately awarded across earlier auction tranches in 2026.