Blue energy projects and technology in India

How to read every ocean energy number on this site. Every statistic — the 9.2 lakh TWh headline, every per-form estimate, every pilot-plant capacity — is presented at four levels: resource potential (gross energy physically present in a sea cell), extractable potential (what a real device can capture at realistic efficiency), techno-economic potential (what is plausibly deployable at plausible cost with grid access) and project feasibility (what survives site-specific engineering, environmental and social screening). The largest number is always the resource potential. For any deployment-relevant figure, look at the techno-economic line. The historical pilots listed below sit at the project-feasibility end of that ladder.

India’s at-sea record, in one paragraph

Read across the last three decades: India has had at least one operating blue-energy device at sea in nearly every year since the mid-1990s. The early devices were wave-energy demonstrators; the operating record expanded through the 2000s with navigational buoys and decade-2010-onward LTTD plants at Lakshadweep. Floating PV is now being rolled out at real industrial scale — though mainly on inland reservoirs. Offshore wind is at the lease-award and pre-construction stage as of 2024. None of this puts India in the global commercial marine-energy league, but it does put India in the conversation at a level many narrative pieces miss.

A marine engineer on the breakwater of Vizhinjam harbour on India's southern coast with a small spinning ocean research buoy. — Vizhinjam — where India’s wave-energy pilot history begins.

A wave-powered navigational buoy drifting on the open sea off India's coast, bright orange colour, calm to moderate waves. — Wave-powered navigational buoys — small in size but high in deployment count, and a useful survivability-data source.

A lab technician testing small turbine prototypes on a long bench inside an Indian research laboratory. — Lab-bench work — most blue-energy R&D in India starts here.

Canonical Indian pilots and projects

An inventory of blue-energy activity in India

A technology-by-technology survey of what has been built, operated, piloted or studied in Indian waters or for Indian markets. Where dates are approximate, this list favours documenting the existence of the work over precise capacity. Where a project is now decommissioned, the entry makes that clear.

Operating & historical LTTD (desalination)

NIOT LTTD plants — operating list
Plant	Capacity	Since	Notes
Kavaratti LTTD	~100,000 L/day fresh water; pump power ~100 kW class	2005	First NIOT LTTD plant; multi-year operating data informing design refinements.
Agatti LTTD	~100,000 L/day	2011–12	Second plant; lessons shared with Kavaratti operating team.
Minicoy LTTD	Comparable capacity	2012 onwards	Third island; SUVIDHA programme context.
SUVIDHA programme plants	Multiple small plants	2010s onward	Strategic interventions under MoES’ island energy mandate.

Wave energy

Wave-energy pilot history in India
Pilot	Capacity	Era	Notes
Vizhinjam OWC pilot (NIOT)	150 kW class	1990s	Early grid-connected OWC at breakwater; low duty-cycle lessons led to design changes in subsequent pilots.
Wave-powered navigational buoys (NIOT)	Sub-kW each	2000s onwards	Fleet deployment for Indian Coast Guard and port authorities; valuable survivability data.
Academic sea trials (IIT Madras, IIT Kharagpur, others)	Lab & small sea-trial scale	2010s onwards	Continue to inform anchor design, power take-off and structural survival topics.

Tidal energy (feasibility & design studies)

Tidal feasibility work in India (selected)
Site	Forms studied	Era	Notes
Gulf of Khambhat	Barrage and stream	1980s–2010s	Multiple feasibility rounds; civil and ecological limits remain the active constraint.
Gulf of Kutch	Barrage and stream	2010s	Studies covering varied geometry; bay amplification smaller than Khambhat.
Sundarbans channels	Stream and barrage feasibility	2010s	Social and ecological constraints dominate; channel pilot concept remains on radar.
Palk Bay / Andaman channels	Stream	2020s	Preliminary resource studies, less mature than Gujarat sites.

Floating PV (selected, India)

Selected Indian floating-PV projects
Site	Capacity	Era	Notes
Omkareshwar Dam Reservoir (Madhya Pradesh)	~600 MW pipeline (utility scale)	2018 onwards	Among the world’s largest inland floating-PV projects.
Kayamkulam floating PV (Kerala)	~500 kW pilot	2018	Early demonstration project.
Ramagundam floating PV (Telangana)	~100 MW	2020s	Reservoir-scale plant.
Rihand, Koyna, others — reservoir pilots	Various	2020s	Pipeline continues to extend.

Offshore wind lease blocks

Offshore wind lease blocks (India)
Lease block	Capacity indication	Era	Notes
Gujarat — Pipavav & Jamnagar initial blocks	Tens of GW over multiple phases	2024 onwards	First commercial lease awards; execution milestones defined.
Tamil Nadu — southern tip blocks	Multi-phase pipeline	2024 onwards	Builds on Rameswaram–Kanyakumari resource profile.
Floating offshore wind pilots	Sub-100 MW	2020s pilot	Pre-commercial floating wind demonstrators.

Salinity-gradient & ocean-current projects

Most Indian work in these forms is at lab and academic pilot scale, primarily at IIT Kharagpur, IIT Madras, IISc Bengaluru, NIT Tiruchirappalli and a few other institutions. No commercial installations of PRO or RED in Indian waters as of 2024. Ocean-current energy work in India is also at resource-assessment and conceptual design stage.

Pipeline & roadmap

What is expected to be built in the next 5 years

A grounded reading of credible announced work — not a sales pitch.

2025–26 — Initial commercial fixed-bottom offshore wind
First fixed-bottom offshore wind projects off Gujarat enter construction. Foundation-engineering milestones. EPC contracts awarded.
2025–27 — Additional LTTD plants at Lakshadweep & A&N
Cumulative island plants across Lakshadweep and Andaman & Nicobar chains. SUVIDHA and successor programmes continue to scale sub-MW LTTD.
2026–28 — Floating PV pipeline continued
Inland pipeline extends; marine pilots in sheltered bays added. Storage sizing increasingly paired with new floating PV.
2027–30 — Floating offshore wind pre-commercial
First floating offshore wind demonstrators in deep-water cells; capacity-factor targets around 50% with joint storage.
Throughout — Lab → field pilots
Salinity-gradient, current and OTEC pilots continue at lab scale; some reach small sea-trial deployments in selected concession cells.

Technology readiness levels across the family

The Indian project record across the seven blue-energy forms shows a clear TRL (Technology Readiness Level) hierarchy:

Approximate TRL snapshots (post-2024)
Technology	Approx. TRL (India)	Approx. TRL (global frontier)	Comment
Offshore wind (fixed-bottom)	8–9	9 (commercial, mult-GW)	First-of-its-kind Indian project imminent; global commercial for two decades.
Floating offshore wind	4–6 (pilot scale)	7–8 (global pre-commercial)	Indian supply chain being assembled.
Floating PV (reservoir)	9 (commercial)	9 (commercial)	Indian capacity scales with deployment.
Floating PV (marine)	5–7 (pilot)	6–8 (global pilots)	Marine-ambient corrosion needs more engineering.
LTTD (desalination)	8 (operating)	7–8 (global pre-commercial)	India has the strongest at-sea track record.
OTEC (electricity)	5–7 (pilot)	6–7 (global pilot)	LTTD is the de-facto Indian OTEC-LTTD deployment.
Wave energy	5–7 (pilot)	6–8 (global pilots)	Vizhinjam hi/lo lessons; floating buoy deployments continue.
Tidal energy	4–6 (feasibility)	7–8 (commercial pilots globally)	Indian feasibility has been extensive; civil & ecological limits.
Salinity-gradient (PRO, RED)	3–5 (lab)	5–7 (global pilots)	Membrane lifetime is the lever.
Ocean current	3–5 (resource)	5–7 (global pilots)	Cell-level co-location argument in India.

TRL is a rough ordinal indicator, not an absolute measure. The point of the table is that India is at or near the global frontier on LTTD, and within a few years of the global frontier on offshore wind; on the smaller forms, the work is at lab and pilot scale.

Lessons India has absorbed

A few cross-cutting lessons accumulate from the operating record:

Survivability comes first. The Vizhinjam OWC lessons and bungy-anchor learnings across buoy programmes have shaped Indian engineering design conservatism for any device deployed at sea.
Biofouling is not optional. Tropical biofouling imposes routine in-water cleaning cycles that materially affect operating cost.
Operation is harder than engineering. Most pilot plants worldwide underperform in operations because the operational phase receives less engineering attention than deployment.
Integration with grid or offtake — not the device itself — is the binding constraint at small industrial scale.
Standards matter. India contributes to IEC TC 114 international ocean-energy standards work; participation helps procurement of internationally-financed equipment.

Where to read the canonical Indian record

NIOT annual reports and technical bulletins — a primary source for at-sea work.
MNRE status reports on offshore wind.
INCOIS atlas and regional studies.
MoES Deep Ocean Mission reports.
Peer-reviewed work in journals such as Renewable & Sustainable Energy Reviews, Energy for Sustainable Development, Journal of Ocean Engineering and Marine Energy.

The resources page collects direct links.

FAQ

Projects & technology questions

Has any Indian blue energy been deployed at commercial scale?

Offshore wind: pre-construction, with commercial lease blocks awarded in 2024. LTTD: at industrial-operating scale at three Lakshadweep islands. Floating PV: at commercial scale on inland reservoirs; marine pilots in sheltered bays. Wave, tidal, OTEC, salinity-gradient, ocean-current: at pilot or feasibility stage.

What is the most successful Indian pilot?

The LTTD plants at Kavaratti, Agatti and Minicoy are arguably the most successful — operational for nearly two decades, displacing diesel-powered RO desalination on energy-poor islands.

What happened to Vizhinjam?

The 150 kW OWC pilot operated at low duty-cycle in the 1990s and was decommissioned. The site, design and operating lessons informed subsequent Indian wave-energy device design.

What about the Deep Ocean Mission?

Deep Ocean Mission (MoES, 2021 onwards) includes technology components covering deep-sea mining, ocean biology, deep-water vessels and ocean-energy research. Several NIOT-anchored ocean-energy programmes are aligned with its work.