India's reservoirs can host 102 GW of floating solar, says first national assessment

📌 Summary:

• The first comprehensive national assessment by the National Institute of Solar Energy (NISE) — an autonomous body under the Ministry of New and Renewable Energy (MNRE) — finds India's reservoirs can host about 102 GW of floating solar capacity
• The 121-page report, "Solar PV Potential of India (Floating Solar)", frames water-mounted panels as a way around the biggest obstacle in the solar sector: land. Ground-mounted systems need three to four times more area per MW than the panels themselves occupy
• The report contains no estimate of the cost to realise this potential in India; its only cost reference is a 2021 U.S. NREL benchmark indicating floating plants cost about 25% more upfront (due to floats, anchoring and waterproofing)
• For context, India's current installed solar capacity is roughly 100 GW, almost entirely ground-mounted — so the floating potential is comparable in scale

🎯 UPSC Relevance: GS3 (renewable energy, energy security, land-use trade-offs and sustainable development). Floating solar also reduces reservoir evaporation and can co-exist with hydropower, but raises questions of cost and aquatic-ecosystem impact.

📝 Prelims Facts:

• NISE is the apex national R&D institution for solar energy under MNRE, located at Gwal Pahari, Gurugram (Haryana)
• Floating solar (floatovoltaics) involves PV panels mounted on floating structures on water bodies
• The U.S. National Renewable Energy Laboratory (NREL) benchmark cited dates to 2021

🔑 Key Term: Floating Solar Photovoltaics (FPV) — solar panels installed on floats over reservoirs, lakes or other water bodies, saving land and reducing water evaporation.