CERC Approves Tariffs for SECI’s 600 MW Wind-Solar Hybrid Projects

MNRE Issues Guidelines for Installation of Prototype Wind Turbines 

Rajasthan Issues Draft Intrastate Transmission System Connectivity Regulations

ANERT Invites Proposals for Green Energy Demonstration Projects

Daily News Wrap-Up: Utility Solar Project Costs Up Slightly in Q1 2025

SECI Tenders 2 GW Solar Projects with 4 GWh Energy Storage Systems

Torrent Green Energy Wins SECI’s 600 MW Wind Auction

Power Ministry Proposes Sale, Lease, Renting of Energy Storage Systems

NHPC Issues Tender for 2.5 MW Rooftop Solar Projects in Nagaland

NTPC Raises $750 Million via External Commercial Borrowing

<table id="amazon-polly-audio-table">
						<tr>
						<td id="amazon-polly-audio-tab">
							<div id="amazon-ai-player-label">Listen to this article</div>
							<div id="amazon-ai-player-container">
			<audio class="amazon-ai-player" id="amazon-ai-player" preload="none" controls controlsList="nodownload" >
				<source type="audio/mpeg" src="https://cms.mercomindia.com/wp-content/uploads/2025/05/amazon_polly_79271.mp3?version=1746597681">
			</audio>
		</div>
							<div id="amazon-polly-subscribe-tab"></div>
							<div id="amazon-polly-by-tab"></div>
						</td>
						</tr>
					</table>Utility-scale ground-mounted solar projects require large tracts of land. With increasing infrastructure development, land in India is becoming not only scarce but also expensive. Installing solar modules on water bodies is increasingly being explored to overcome the challenge of land availability.
Floating solar projects are slowly gaining traction in India and across the world for their unique advantages, including cutting down water evaporation, cooler operating temperatures, and minimizing land use.
However, floating solar projects come with their own set of challenges. Water bodies often witness fluctuating water levels and turbulence, which can impact the structural integrity and stability of solar modules.
Global floating solar company <a href="https://ciel-et-terre.net/" target="_blank" rel="noopener">Ciel &amp; Terre</a> commissioned a 120 MW floating solar project at Omkareshwar in Madhya Pradesh, in collaboration with L&amp;T and SJVN Green Energy, to generate power for Rewa Ultra Mega Solar.
The floating solar farm spans 210 acres on the freshwater reservoir and is designed as fourteen individual islands, each generating 8.5 MW of power.
The system incorporates 407,699 Hydrelio floats, which are configured using the aiR OPTIM 1400-3 model in a three-row setup. This configuration plays a vital role in adapting the floating infrastructure to house higher-capacity modules.
Another highlight is the implementation of a rock bolt anchoring system. Traditional methods, such as deadweights or helical anchors, are not effective on uneven or rocky reservoir beds. At Omkareshwar, the underwater terrain is irregular and includes hard rock surfaces, making conventional anchoring unsuitable due to the risk of slipping and displacement. Rock bolt anchoring involves drilling directly into the submerged rock bed to fix the mooring lines, providing a highly secure and stable foundation. This ensures the solar islands remain firmly in place even under heavy water currents and wind loads.
The project also introduced a customized floating inverter barge made from fiber-reinforced plastic (FRP). Traditionally, inverters are placed onshore or on ferrocement barges. However, in floating solar systems, especially where the solar array is positioned far from the land, this results in significant transmission losses. To overcome this, the inverters at Omkareshwar were placed on floating barges located close to the solar arrays.
The use of FRP instead of steel or cement provides several advantages. The material is corrosion-resistant, has a higher strength-to-weight ratio—about 50% more than steel—and offers better durability under harsh environmental conditions. The barge is capable of supporting over 40 tons, making it suitable for housing heavy equipment like power transformers, inverters, and switchgear.
To further bolster the system’s durability, the floats were manufactured using spin welding technology. This method ensures leak-proof joints that can withstand the stress of thermal expansion during high temperatures. By preventing water ingress and cracks, the technology extends the lifespan of the floating structure and maintains its buoyancy and performance even under extreme weather conditions.
The execution of the Omkareshwar project was not without its challenges. The team encountered torrential rains, flooding, gusty winds, intense sun exposure, and a highly irregular rocky underwater surface.
Ciel Et Terre India, MD &amp; CEO, Deepak Ushadevi, said, “When we embarked on this journey, we knew it would be a really challenging and tough project, but we also knew that with the right technology, right team, and right mindset, we would achieve success.”
Recently, Kerala’s Agency for New and Renewable Energy Research and Technology (ANERT) <a href="https://www.mercomindia.com/kerala-roadmap-develop-floating-solar-projects" target="_blank" rel="noopener">issued</a> guidelines to support the development of floating solar projects across the state. It has estimated that the water bodies in Kerala offer up to 6,500 MW of floating solar potential.
Several agencies in India have recently floated tenders for floating solar projects of different capacities. One of the biggest of them was Damodar Valley Corporation’s tender for 234 MW of floating solar projects <a href="https://www.mercomindia.com/damodar-valley-corporation-234-mw-floating-solar" target="_blank" rel="noopener">issued</a> in December 2024.

Ciel & Terre’s 120 MW Floating Solar Project Uses New Anchoring Technique

<table id="amazon-polly-audio-table">
						<tr>
						<td id="amazon-polly-audio-tab">
							<div id="amazon-ai-player-label">Listen to this article</div>
							<div id="amazon-ai-player-container">
			<audio class="amazon-ai-player" id="amazon-ai-player" preload="none" controls controlsList="nodownload" >
				<source type="audio/mpeg" src="https://cms.mercomindia.com/wp-content/uploads/2023/05/amazon_polly_54161.mp3?version=1684732889">
			</audio>
		</div>
							<div id="amazon-polly-subscribe-tab"></div>
							<div id="amazon-polly-by-tab"></div>
						</td>
						</tr>
					</table>To achieve India&#8217;s national targets for solar capacity additions, alternatives such as the floating solar need to be explored and established, considering their lower levelized cost of electricity and operation and maintenance costs, which is further complemented by easier deployment, Deepak Ushadevi &#8211; MD &amp; CEO &#8211; <a href="https://ciel-et-terre.net/" target="_blank" rel="noopener">Ciel &amp; Terre India</a>, said in an interview on the sidelines of the <a href="https://www.mercomindia.com/india-urgency-meet-clean-energy-transition-targets" target="_blank" rel="noopener">Mercom India Renewables Summit 2023</a>.
Here are excerpts from the interview.
What is the driving factor for adopting floating solar solutions?
Traditional roof and ground mount utility projects face land scarcity issues, leading to wind and floating solar as new alternatives that reduce carbon footprint and offer solutions.
The challenge is to preserve land and minimize delays in acquiring it for organizations and infrastructure development. So, we need to explore new solutions, including tapping into the potential of floating solar in inland water bodies.
It allows us to install solar panels over water, preserving land and water while being an excellent alternative replacement for traditional solar panels from social, economic, and biological perspectives.
The extra 5-7% generation from floating solar due to panel cooling also reduces the Levelized Cost of Electricity (LCOE).
In India, many dams and reservoirs have great potential for floating solar. In recent years, the maximum capacity of floating solar projects has increased from 2 MW to 500 MW.
Currently, 2 GW of floating solar tenders are already auctioned, and we expect to see 2-3 GW of floating projects in India in the next 2-3 years.
Globally, in the next three years, over 77% of the floating projects, equivalent to around 11.50 GW, will occur in Asia, particularly in the Indian subcontinent and Southeast Asia.
How do companies identify states with inland water bodies suitable for floating solar projects? 
We do not face any issues with water bodies in India. According to data, we have 5,534 available dams and reservoirs.
Even if we use only 40% to 50% of them, we can generate over 200 GW of power from these projects. In addition, we have backwaters and both manual and non-manual reservoirs, providing us with plenty of options. We can optimize capacity utilization by considering dams and reservoirs for floating solar and natural hydropower.
The existing infrastructure for dams with power infrastructure available eliminates the need for additional power infrastructures.
We can use the dams and reservoirs as they are, and there is no need for road filling, approach ways, or other ground modes.
A hybrid model combining floating solar and natural hydropower can be used, where floating solar can be used during the day and hydropower at night. This way, we consider both sources and use optimized operational ways to complement each other.
What are the cost savings and efficiency gains with floating solar projects?
Looking at it from a cross-functional perspective, ground-mounted solar structures require the use of purlins and rafters, along with piling work.
On the other hand, we need to use anchoring, mooring, and hearing anchors for floating solar projects to withstand high winds, depths, waves, currents, water level variations, droughts, floods, and more.
It is the most expensive part of the project. However, we also get extra generation capacity over 25 years, which offsets the additional cost.
As a company with a globally recognized portfolio of over 300 projects completed in 32 countries across five continents, with a 1.7 GW portfolio, we are experts in the field.
Delay in land acquisition is a major issue nowadays, but the government owns water bodies, so there are no issues related to land acquisition.
In addition, we use only 4 to 5% of the water reserves, minimizing any impact. We also conduct detailed studies to ensure that flora and fauna are unaffected and fishermen&#8217;s activities are not hindered. Fish breeding is more effective under the cooling effects of floating solar structures.
Which states are at the forefront of exploring floating solar solutions?
RUMSL, a part of the Madhya Pradesh government, has awarded a 600 MW project. Phase one is in Omkareshwar.
Odisha and Kerala have also tendered 2-3 projects each. NTPC has put forward more than 300 projects, including a 1 GW project in Damodar Valley Corporation (DVC).
Initially, there were questions, apprehensions, and teething issues regarding who will take care of the first project.
However, the project has started, more tenders are being issued, and stakeholders feel confident that this is a viable alternative.
Most state governments are asking us about the feasibility and possibility of the project, with some already in the tendering stage.
Could you tell us about the average cost of power for floating solar projects?
The average power cost is around ₹3.15 (~$0.038)/kWh &#8211; ₹3.3 (~$0.040)/kWh, which is the PPA (power purchase agreement) signing-off rate.
However, some variations may be based on the availability of modules, BCD (Basic Customs Duty), ALMM (Approved List of Models and Manufacturers), and other factors that affect transactions and cause minor delays.
The cost difference between ground-mounted and floating structures is only 7 to 10%, with the latter being slightly more expensive due to its technology. However, over time, the cost difference will be offset by savings in operation and maintenance costs.
Currently, the availability of modules is a major concern, with more than 60% of them being imported and the BOS part accounting for around 75 to 80% of the overall cost. However, even with these factors, the power cost of ₹3.15 (~$0.038)/ kWh is still considered reasonable by many states.
Additionally, selling excess energy at a rate of ₹5 (~$0.061)/kWh can help offset the cost of power bought at a lower rate. Over the years, the power cost has decreased from around ₹4 (~$0.049)/kWh to the current rate.
(Note: Sections of the interview have been paraphrased for better reading. Check out the video for a full chat)<iframe loading="lazy" title="Deepak Ushadevi" src="https://player.vimeo.com/video/827633004?h=64ae6e176b&amp;badge=0&amp;autopause=0&amp;player_id=0&amp;app_id=58479" width="100%" height="500" frameborder="0" allowfullscreen="allowfullscreen"></iframe>

Higher Generation and Lower Landed Cost Make Floating Solar Appealing: Interview

Ciel et Terre International, a French floating solar specialist, has started its endeavour to increase its footprint in the solar industry of India.
As part of its expansion plans in India, one of the most rapidly growing markets in the world, the company has partnered with a local blow moulder in Aurangabad, Maharashtra to start a 50 MW floating solar manufacturing unit.
It has also opened a new subsidiary, Ciel &amp; Terre India, located in Bangalore to offer the latest Hydrelio solution and make the most of expanding floating solar opportunities in the country.
International Coil Limited has bagged the contract for the engineering procurement construction (EPC) of this project.
Its manufacturing unit will first deliver floats to a 5 MW project on a raw water pond at Sagardighi Thermal Power Project located in Murshidabad, West Bengal.
<a href="https://mercomindia.com/west-bengal-auctions-5-mw-floating-solar-pv/" target="_blank" rel="noopener noreferrer">Mercom reported in March 2018 that</a> the West Bengal Power Development Corporation Limited (<a href="http://www.wbpdcl.co.in/" target="_blank" rel="noopener noreferrer">WBPDCL</a>) auctioned a 5 MW, grid-connected floating solar project to be developed in the district of Murshidabad.
“Demand for floating solar technology is growing in India and Ciel &amp; Terre is also in discussion with Solar Energy Corporation of India (SECI) for a 150 MW floating PV project at the Rihand Dam in Uttar Pradesh, India’s largest dam by volume,” said Stéphane Prouvost, CEO of Ciel &amp; Terre India.
As reported by Mercom in <a href="https://mercomindia.com/seci-100mw-floating-solar-tender/" target="_blank" rel="noopener noreferrer">March 2018</a>, SECI had tendered 100 MW of floating solar projects to be developed in the state of Uttar Pradesh. Later, the capacity was increased from 100 MW to <a href="https://mercomindia.com/seci-increases-capacity-150mw-floating-solar/" target="_blank" rel="noopener noreferrer">150 MW</a>.
The projects will be developed on the Rihand Dam, also known as Govind Ballabh Pant Sagar Reservoir, located in Sonbhadra district of Uttar Pradesh.
Prouvost further added, “There are two main markets for floating PV in India. First is the captive market, since India has many conglomerates that own huge water bodies and reservoirs like on steel and thermal power industries. Power from the grid for such companies is at ₹6-9 (~$0.087-0.13) per unit, whereas floating solar can offer power at less than ₹5(~$0.073).”
The second major floating solar market in India is for utility-scale tenders put out by distribution companies (DISCOM), he added.
The French company said it will also provide technology solutions along with the design and customize the floating structure to take the shape of the reservoir. It will install the anchoring system after studying local wind conditions, water level variation and soil computation.
Floating solar PV projects are slowly gaining traction in the country. In the past few months, numerous tenders for small-capacity floating solar PV projects have been issued.
<a href="https://mercomindia.com/msedcl-expression-interest-1-gw-floating-solar/" target="_blank" rel="noopener noreferrer">Recently</a>, the Maharashtra State Electricity Distribution Company Limited (<a href="https://www.google.com/url?sa=t&amp;rct=j&amp;q=&amp;esrc=s&amp;source=web&amp;cd=1&amp;cad=rja&amp;uact=8&amp;ved=0ahUKEwi3tv6uoJXYAhVD8IMKHepjCLoQFggpMAA&amp;url=http%3A%2F%2Fwww.mahadiscom.com%2F&amp;usg=AOvVaw2QxivFcdTQaLrnZ2QmlQTP" target="_blank" rel="noopener noreferrer">MSEDCL</a>) invited an Expression of Interest (EoI) to develop 1,000 MW of floating solar projects.

Ciel et Terre Opens Floating Solar Manufacturing Unit in India

ciel-terre

Get the most relevant India solar and clean energy news.

RECENT POSTS