₹77.41 crore, one turbine and a foundation design still to be decided by whoever wins the tender.
NEW DELHI: Indian Port Rail & Ropeway Corporation Ltd issued an open tender in late September 2026 for India’s first physical offshore wind installation, a single 6.25 MW turbine to be built roughly 1,650 metres off the Southern Breakwater of V.O. Chidambaranar Port in Thoothukudi, Tamil Nadu. The tender, worth approximately ₹77.41 crore, covers the complete engineering, procurement, construction and installation lifecycle, followed by a mandatory two-year operations and maintenance period, with bids due by October 29.
This marks a genuine shift from paper to hardware for a sector that has spent over a decade in planning stages. The project will be executed under a single-stage, two-packet EPC contract, with a stipulated 365-day execution window and electricity evacuated directly into the Tamil Nadu state grid under TANGEDCO and TANTRANSCO’s technical norms.
Why Thoothukudi, Specifically
The site selection rests on a combination of favourable wind resources and practical logistics. The National Institute of Wind Energy identified the Gulf of Mannar, off Tamil Nadu’s southern coast, as one of India’s two primary offshore wind corridors, the other being Gujarat’s Gulf of Khambhat, based on LiDAR measurement campaigns confirming strong mean wind speeds and manageable wave conditions. Tamil Nadu already carries the second-highest installed wind capacity in India at 12,273 MW, trailing only Gujarat, giving the state an existing base of component suppliers and skilled engineering personnel to draw on.
Positioning the turbine close to the port’s breakwater offers additional practical advantages. It shields the installation from open-ocean swell while still capturing the coastal wind corridor, and it keeps subsea export cable lengths short, avoiding the need for a complex offshore transformer platform. VoCPA also brings existing heavy-lift quay infrastructure and deep-draft navigation channels capable of handling the specialised vessels this kind of installation requires.
A Pilot, Not a Power Plant
It’s worth being clear about what this project actually is. At 6.25 MW, this is explicitly a technology demonstrator and proof-of-concept pilot, not a commercial wind farm. Its purpose is to generate real operational data, on marine logistics, subsea structural performance and grid synchronisation, that India’s much larger commercial offshore ambitions will eventually depend on.
Those larger ambitions are already defined on paper. In June 2024, the Union Cabinet approved a ₹7,453 crore viability gap funding package, including ₹6,853 crore to support 1 GW of commercial offshore capacity split evenly between Gujarat and Tamil Nadu, plus ₹600 crore for port upgrades. This single-turbine pilot, tendered through IPRCL rather than through the Solar Energy Corporation of India, which will handle the larger commercial auctions, is meant to build the operational confidence and institutional experience that commercial bidders and regulators alike will need before that 1 GW programme moves forward.
The Cost of Going First
The economics make the early-stage nature of this project obvious. At ₹77.41 crore for 6.25 MW, the project works out to roughly ₹12.38 crore per megawatt, nearly double the ₹6.5 crore to ₹8 crore per megawatt typical of onshore wind projects in India. That premium reflects several structural realities of offshore construction at this scale: specialised heavy-lift jack-up vessels must be chartered, likely from overseas since no dedicated wind turbine installation vessels are currently homeported in India, and that mobilisation cost cannot be spread across multiple turbines the way it would be on a larger commercial farm. Subsea foundation engineering, corrosion-resistant coatings and armoured power cables add further cost layers that onshore pad foundations simply don’t require.
What the Winning Contractor Still Has to Figure Out
Notably, the tender leaves several critical engineering decisions to the winning contractor rather than specifying them upfront. Detailed subsea geotechnical surveys, bathymetric mapping and the choice of foundation structure, whether a steel monopile, a jacket structure or a gravity-based concrete base, are all delegated to whoever wins the contract, based on conditions found roughly 1,650 metres off the breakwater.
Environmental clearances add another layer of complexity given the project’s proximity to the Gulf of Mannar Marine Biosphere Reserve, home to coral reefs, seagrass meadows and sea turtle nesting sites. Construction will likely require noise-mitigation measures during foundation piling to avoid disturbing marine life, and subsea cable routing will need to steer clear of local fishing channels operating out of Thoothukudi harbour. Grid integration brings its own technical demands too, with dual-channel metering required to separately track power exported to TANGEDCO and any auxiliary power the turbine draws during low-wind periods.
An Early Vote of Confidence From Industry
Private developers have broadly welcomed the move. Srivatsan Iyer, Global CEO of Hero Future Energies, described the pilot as a confidence-building step for both developers and policymakers, while acknowledging that offshore wind’s capital costs remain meaningfully higher than onshore alternatives, a reality this project’s own economics bear out.
What Determines Whether This Actually Matters
The project’s real significance will depend on what happens after it’s built, not on the construction itself. If the operational data it generates, on capacity utilisation, corrosion rates, structural integrity and grid performance, gets shared transparently and feeds into NIWE and SECI’s planning for the upcoming 1 GW commercial auctions, it could meaningfully lower risk premiums for future developers. If that data instead stays isolated within VoCPA’s own records, or if the project runs into costly delays or technical setbacks, it risks becoming a symbolic gesture rather than the genuine de-risking exercise it’s meant to be. Bids close on October 29, with technical evaluation following shortly after, and the next eighteen months of surveys, approvals and vessel procurement will show which outcome India is heading toward.
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