Why in News?
Floating Solar Photovoltaics (FSPV)—often called "floatovoltaics"—is prominently in the news because the Ministry of New and Renewable Energy (MNRE) officially released the first-ever comprehensive national assessment report estimating India's floating solar potential at a massive 102 Gigawatts (GWp).
About
- Core Setup: Photovoltaic panels are mounted on modular, buoyant platforms that float on top of calm bodies of water like reservoirs, lakes, quarry ponds, or industrial treatment basins.
- Key Components: Systems comprise a buoyancy body (floats), a heavy-duty anchoring/mooring system to prevent drifting, and specialized underwater power cabling.
- Hybrid Operations: They are heavily deployed on hydropower reservoirs, creating a solar-hydro hybrid loop that shares grid transmission lines and saves infrastructure costs.
Major Advantages & Benefits
- Zero Land Footprint: Completely eliminates conflicts over land acquisition, making it perfect for highly populated or agricultural regions.
- Higher Power Generation: The natural cooling effect of the water beneath the arrays prevents panels from overheating, boosting electricity generation efficiency by 0.6% to 4.4% compared to land-based farms.
- Water Conservation: The physical layout covers the water surface, blocking solar radiation to drastically lower water loss from evaporation, an invaluable benefit during droughts.
- Reduced Algae Bloom: By blocking excessive sunlight from entering the water column, it slows down toxic algae growth, improving overall water quality.
Significant Execution Challenges
- Concurrently, Union Minister Pralhad Joshi announced that the Central Government is launching a dedicated financial incentive scheme alongside a ₹5,500 crore floating solar-plus-battery storage program to fast-track its nationwide development.
- High Initial Capital: Setting up specialized marine-grade floats and anchoring systems makes initial installation costs substantially higher than traditional solar fields.
- Corrosion Risks: Constant exposure to moisture and humidity demands expensive, specialized anti-corrosive materials and higher maintenance costs over time.
- Environmental Uncertainty: Long-term impacts of restricted sunlight on underlying aquatic ecosystems, marine life, and dissolved oxygen levels are still being studied.
Noteworthy Projects in India
- Ramagundam Project: A 100 MW operational facility in Telangana developed by NTPC, previously marking a major milestone for India's inland water solar initiatives.
- Omkareshwar Dam Project: An ambitious 600 MW project currently being scaled on the Narmada River in Madhya Pradesh, set to be one of the largest globally.
- Rengali Reservoir: Bharat Heavy Electricals Limited (BHEL) is actively constructing a massive 300 MW project in Angul, Odisha.
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