Offshore wind & floating solar in India

Why this is India’s leading blue energy

Offshore wind and floating solar are the two forms of India’s blue-energy family for which global cost-curve trajectories are already favourable and Indian institutional capacity is already partly in place:

• Onshore wind in India is a mature, bankable industry with a 40+ GW installed base. The supply chain foundations — blade manufacturing, tower fabrication, project finance — partly read across to offshore wind.
• Solar PV in India has a 70+ GW installed base. Floating PV represents a different engineering challenge (modules on water, anchors, corrosion) but uses much of the same equipment family.
• Transmission for grid-connected offshore wind sits in adjacent ministries (Power, MNRE, MoES) — the governance challenge is not whether the technology works, it is how to coordinate lease areas and onshore landing stations.
• Financing is at a scale where the Indian banking system can absorb it, which is not the case for many other ocean-energy technologies.

Indicative capex and LCOE thinking

Indian capex figures published by MNRE, NIWE and leading developers put fixed-bottom offshore wind capex in the early-2020s band at roughly Rs 7–9 crore per installed MW. Floating offshore wind is higher because of platform and dynamic-cable costs at pilot scale — typically 25–40% above fixed-bottom at small scale, narrowing in long-run learning-curve scenarios. Floating PV capex sits closer to ground-mounted PV, with mild uplift for floats, anchors and corrosion management.

LCOE depends on capacity factor (which depends on wind regime), discount rate, debt-equity mix and the cost of finance. By 2030 most analyst scenarios put fixed-bottom Indian offshore wind LCOE at roughly Rs 4–6/kWh, materially above the lowest onshore wind and PV LCOEs, but competitive when co-located with green hydrogen or industrial offtake. Floating wind is expected to sit above that band initially.

Environmental and social considerations

Offshore wind and floating PV are not zero-impact options. Key questions:

• Avian effects — well-documented at onshore wind; offshore is less studied, especially for migratory seabirds.
• Marine mammals — pile-driving noise during foundation installation; long-running operational noise; effects are species-specific.
• Wealth redistribution — coastal fisheries displacement, even at low occupancy.
• Visual amenity — for the small subset of coastal cities and tourist geographies with sea views.
• Marine spatial planning — how lease areas coexist with shipping lanes, defence exclusion zones, marine protected areas.

None of these in isolation is fatal. Collectively they shape the realistic operating envelope. Good practice is environmental baseline studies at the lease-area level and continuing monitoring through operations.

Honest outlook

1. Fixed-bottom offshore wind is on a credible industrial trajectory in India. First commercial projects off Gujarat and Tamil Nadu are likely to be in construction in the late-2020s.
2. Floating offshore wind remains pre-commercial globally; in India it is on a parallel track, mostly as part of hybrid platforms, and not likely to reach multi-GW scale in the 2020s alone.
3. Floating PV at inland scale is commercial; at marine scale is at the early pilot stage and is best suited to sheltered bays and backwaters, not open-ocean Indian cells.
4. Costs are expected to fall as global offshore-wind supply chains mature, with Indian projects benefiting from improved monopile fabrication, larger rotors, and floating-platform specialisation.

For policy, project pipeline and the institutional landscape see policy & institutions. For the integrated cross-technology story see India’s potential.