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Recent Developments:

• The Union Cabinet approved the Pradhan Mantri Surya Sarovar Yojana (PM-SSY) on 31 July 2026 with a total financial outlay of ₹5,070 crore to accelerate the deployment of Floating Solar Photovoltaic (FSPV) projects integrated with Energy Storage Systems (ESS).
• The scheme targets 5,000 MW of floating solar capacity along with co-located energy storage of 10,000 MWh, with a minimum storage duration of 2 hours.
• Projects will be sanctioned during FY 2026–27 to FY 2030–31, while financial assistance will continue to be disbursed up to FY 2032–33.
• The government’s decision follows the first comprehensive national assessment by the National Institute of Solar Energy, which estimated India’s floating-solar potential at approximately 102.18 GWp.
• The initiative seeks to expand renewable-energy generation without placing additional pressure on scarce land resources and to improve grid reliability through integrated energy storage.

Why Floating Solar is Important for India:

Land Constraints in Renewable Energy Expansion:

• India’s rapid expansion of solar power has relied substantially on ground-mounted utility-scale projects, which require large areas of land.
• Land for renewable-energy projects increasingly competes with agriculture, urbanisation, infrastructure, biodiversity conservation and other economic uses.
• Floating solar provides an alternative by using suitable reservoirs, lakes, industrial ponds and other inland water bodies without requiring comparable additional land acquisition.
• The approach therefore supports the principle of land-neutral renewable-energy expansion, particularly in densely populated regions.

India’s Expanding Floating-Solar Potential:

• The NISE assessment estimates India’s floating-solar potential at 102.18 GWp, based on the use of only up to 20% of eligible water-body surface areas.
• The assessment mapped 10,725.99 square kilometres of water-body area and identified 4,546.01 square kilometres as suitable under specified technical criteria.
• After applying the utilization constraints, the effective deployment area was estimated at 1,946.24 square kilometres, corresponding to the national potential of 102.18 GWp.
• Maharashtra has the highest assessed potential at 16.28 GWp, followed by Madhya Pradesh at 14.89 GWp, Karnataka at 13.69 GWp, Odisha at 12.81 GWp and Telangana at 10.72 GWp.

Floating Solar Photovoltaic Systems: Working Principle:

Basic Mechanism:

• Floating Solar Photovoltaic systems place solar modules on specially designed floating platforms installed over suitable water bodies.
• The floating structures are secured using mooring and anchoring systems connected to the reservoir bed or shoreline, allowing the modules to remain in position despite changes in wind and water conditions.
• Solar electricity generated on the water surface is transmitted to land through electrical cables, where it can be integrated with the power grid.
• Depending on project design, inverters, transformers and other electrical equipment may be installed either on floating platforms or onshore.

Site Selection:

• The suitability of a water body depends on factors such as water availability, depth, solar irradiation, proximity to roads and electrical substations, competing water uses and environmental sensitivity.
• The NISE assessment considered water bodies with a minimum area of 10 hectares, water depth of approximately 3–30 metres, year-round water availability and adequate solar irradiation.
• The assessment also considered proximity to road networks and electrical substations to reduce infrastructure and transmission constraints.

Major Benefits of Floating Solar:

Land Conservation:

• Floating solar reduces competition for agricultural and other productive land because electricity generation takes place over existing water surfaces.
• It can be particularly useful for regions where suitable land is scarce, expensive or environmentally sensitive.
• The technology can therefore complement ground-mounted solar rather than completely replacing it.

Water Conservation:

• Solar modules can reduce the amount of direct solar radiation and wind exposure reaching the water surface, potentially lowering evaporation.
• The magnitude of water savings depends on surface coverage, climatic conditions, reservoir characteristics and local wind patterns.
• Water conservation can provide an additional benefit in water-stressed regions, although excessive surface coverage must be avoided.

Improved Solar Performance:

• Water surrounding the floating platforms can provide a cooling effect, potentially improving photovoltaic module performance under high-temperature conditions.
• This advantage is particularly relevant for India because high ambient temperatures can reduce the efficiency of conventional photovoltaic modules.

Renewable Energy and Grid Benefits:

• Floating solar can increase renewable-energy generation while making productive use of existing reservoirs and industrial water bodies.
• PM-SSY’s integration of energy storage systems can help address the intermittency of solar power and improve electricity availability beyond daylight hours.
• The government estimates that the scheme could help reduce approximately 10 million tonnes of CO₂ emissions annually after implementation.

India’s Floating-Solar Progress:

Major Projects:

• NTPC Limited commissioned the 100 MW Ramagundam Floating Solar Project in Telangana and the 92 MW Kayamkulam Floating Solar Project in Kerala in 2022.
• The 600 MW Omkareshwar Floating Solar Park in Madhya Pradesh represents another major development in India’s floating-solar sector.
• The first phase of the Omkareshwar project has 278 MW of capacity commissioned, with the remaining capacity under development.
• Despite these projects, India’s installed floating-solar capacity remains only around 700 MW, indicating a substantial gap between assessed potential and actual deployment.

Pradhan Mantri Surya Sarovar Yojana: Key Features:

Financial and Capacity Provisions:

• PM-SSY has a total outlay of ₹5,070 crore and aims to establish 5,000 MW of FSPV capacity with 10,000 MWh of co-located energy storage.
• The Central Government will provide Central Financial Assistance of ₹1 crore per MW to eligible floating-solar projects after successful commissioning.
• Up to ₹50 lakh per project will also be available for feasibility studies covering activities such as bathymetry, hydrography, environmental assessment and other preparatory work.
• The scheme will cover all States and Union Territories, enabling floating-solar development across different regional water-resource settings.

Wider Policy Objectives:

• The scheme aims to promote renewable-energy capacity addition, energy security, land conservation, grid reliability and domestic manufacturing.
• It is also expected to support manufacturing across the floating-solar value chain, including floating systems, photovoltaic cells and modules and energy-storage systems.
• The initiative therefore links renewable-energy expansion with Aatmanirbhar Bharat, industrial development and the broader Viksit Bharat objective.

Major Challenges:

Environmental and Ecological Concerns:

• Floating solar is not automatically environmentally neutral because extensive coverage of water surfaces can influence light penetration, water temperature, dissolved oxygen, aquatic ecosystems and biodiversity.
• Large projects may affect fisheries, aquatic vegetation, bird habitats and local livelihoods, particularly where reservoirs support multiple economic activities.
• Ecologically sensitive water bodies and important biodiversity areas should therefore be subjected to site-specific environmental assessment before project approval.

Climate and Weather Vulnerability:

• Floating structures are exposed to strong winds, waves, storms and rapidly changing water levels, creating engineering challenges that differ from conventional ground-mounted solar.
• Anchoring and mooring systems must be designed for local hydrological and meteorological conditions.
• Climate-resilient design is particularly important as extreme-weather events can increase structural and operational risks.

Higher Capital and Operational Costs:

• Floating solar generally involves additional costs for floating platforms, anchoring systems, specialized electrical infrastructure, installation and maintenance compared with conventional ground-mounted systems.
• Integrating battery energy storage systems further increases upfront capital requirements.
• Long-term project economics therefore depend on technology costs, financing conditions, electricity tariffs and capacity-utilization levels.

Institutional Coordination:

• Floating-solar projects require coordination among State Governments, electricity utilities, water-resource departments, irrigation authorities, municipal bodies, environmental regulators and industries.
• Unclear ownership or competing uses of water bodies can delay project development.
• A transparent framework for site identification, leasing, water-use rights, environmental clearance and institutional responsibility is therefore essential.

Policy Priorities and Way Forward:

Sustainable Site Selection:

• The government should prioritize degraded, industrial and suitable reservoir surfaces rather than ecologically sensitive wetlands and biodiversity-rich water bodies.
• A scientifically developed national and State-level database should classify water bodies according to technical suitability, ecological sensitivity, competing uses and grid connectivity.
• The NISE assessment can provide the foundation for such evidence-based planning.

Environmental Safeguards:

• Projects should undergo appropriate environmental impact assessment and cumulative-impact assessment where multiple projects are proposed within the same water system.
• Surface coverage should remain within scientifically determined limits to protect aquatic ecosystems, fisheries and water quality.
• Local communities, fisher groups and other water-dependent stakeholders should be incorporated into project planning.

Technology and Domestic Manufacturing:

• India should promote indigenous manufacturing of floating platforms, mooring systems, photovoltaic modules, power electronics and energy-storage technologies.
• Research should focus on materials capable of withstanding UV exposure, corrosion, high winds, waves and fluctuating reservoir levels.
• Domestic innovation can reduce project costs and strengthen the resilience of India’s floating-solar supply chain.

Storage and Grid Integration:

• Since solar generation is intermittent, combining FSPV with battery energy storage and other flexible resources can improve grid reliability.
• Storage should be planned according to generation profiles, electricity demand, grid constraints and local renewable-energy penetration rather than treated merely as an additional project component.
• Better forecasting, transmission planning and smart-grid technologies can further improve integration.

Value Addition for UPSC:

Key Facts:

• PM-SSY outlay: ₹5,070 crore.
• Floating-solar target: 5,000 MW.
• Co-located storage target: 10,000 MWh, with a minimum duration of 2 hours.
• Central Financial Assistance: ₹1 crore per MW after successful commissioning, plus up to ₹50 lakh per project for eligible feasibility studies.
• India’s assessed floating-solar potential: 102.18 GWp, based on the NISE national assessment.
• Current installed floating-solar capacity: approximately 700 MW.
• Highest assessed State potential: Maharashtra – 16.28 GWp, followed by Madhya Pradesh, Karnataka, Odisha and Telangana.
• Annual emission reduction expected from PM-SSY: approximately 10 million tonnes of CO₂