Pinnapuram Integrated RE Storage Project
The world's largest integrated renewable-plus-pumped-storage project — the blueprint for firm, dispatchable RE (FDRE) at utility scale.
Footage · AP Infra Story · YouTube
1.68 GW
Pumped storage capacity
One of the largest single pumped-hydro schemes under construction globally
approx. 3 GW
Integrated RE capacity
Solar and wind paired to charge storage and firm supply
approx. 8-10 hrs
Storage duration
Enables evening/peak and round-the-clock dispatch
approx. USD 3 bn
Estimated investment
Funded via mix of equity, sovereign/pension capital, debt
approx. 10,000 acres
Land footprint
Reservoirs, solar/wind fields and evacuation corridor
NTPC RTC deal
Anchor offtake
Long-term round-the-clock renewable supply agreement
2019
Greenko conceives integrated pumped-storage-plus-RE model at Pinnapuram, Kurnool district, Andhra Pradesh.
2020
Construction of pumped hydro civil works and reservoirs begins; approvals secured from state and central agencies.
2021-22
Large equity infusions from global investors (including sovereign and infrastructure funds) close, anchoring project financing.
2022
NTPC signs long-term agreement with Greenko for round-the-clock renewable supply, validating the FDRE offtake model.
2023
First pumped-storage units and associated solar/wind capacity begin phased commissioning and grid synchronisation.
2024
Progressive scale-up continues toward full 1.68 GW storage and 3 GW RE integration, with additional capacity tied to national FDRE tenders.
Pinnapuram is the world's first project to co-locate multi-GW pumped-hydro storage with solar and wind at this scale, designed to deliver firm, round-the-clock renewable power. For Indian developers, lenders and utilities it is the reference case for FDRE bids, hybrid land-water permitting, long-tenor project finance from sovereign and pension funds, and structuring PPAs that monetise storage as a grid service rather than just energy.
Pinnapuram is shaping how CEA, CERC and state DISCOMs define FDRE tender norms, storage-linked ISTS waivers, and round-the-clock PPA formats. Developers bidding into SECI/state FDRE and standalone storage tenders should study its land-water clearance sequencing, hybrid grid connectivity approach, and blended sovereign-fund financing structure as a template for bankability at gigawatt scale.
Engineering, procurement and finance lessons
01
Storage must be sized to the resource, not the tender
Pumped-hydro capacity and reservoir head were engineered around actual local topography and RE generation profiles, not a generic MW figure. Developers should commission detailed hydrology and generation-correlation studies before locking storage size in bids, avoiding costly resizing later.
02
Land and water rights are the real critical path
Large upper/lower reservoirs and multi-GW solar-wind footprints require early, parallel-tracked state clearances for land, forest, water-use and rehabilitation. Sequencing these before financial close, rather than after, is what keeps such projects bankable on schedule.
03
FDRE offtake structures need new PPA language
Standard solar/wind PPAs do not capture storage value. The NTPC round-the-clock agreement shows the shift toward availability-based and time-block delivery contracts; Indian utilities and SECI/state tenders now need to standardise such formats for storage-backed RE.
04
Capital stack diversification de-risks scale
Financing multi-billion-dollar integrated projects required blending sovereign wealth, pension and infrastructure fund equity with domestic debt, reducing dependence on any single lender class. This template is replicable for other large Indian storage-RE hybrids.
05
Grid integration studies must precede capacity addition
Evacuation infrastructure and transmission augmentation were planned concurrently with generation and storage build-out, avoiding the stranded-capacity risk seen in earlier standalone RE parks.
Sources · Economic Times Energy · Mercom India · Press Information Bureau (PIB) · Business Standard · Reuters
- Structuring FDRE and storage-linked PPAs aligned with evolving CERC/SECI tender norms and offtake risk allocation.
- Advising on integrated land, water and forest clearance sequencing for hybrid pumped-storage-RE sites.
- Structuring blended capital stacks combining green debt, sovereign/pension equity and PPP frameworks for large storage-RE assets.
