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Floating solar photovoltaic panels for water resource conservation

February 2020
Gallery Hydrelio® 1
Gallery Hydrelio® 1


Hydrelio® is modular, scalable, adaptable to most PV panels and compatible with many types of water bodies.

The solution aims to respond to the ground-mounted and rooftops systems issues. It is particularly interesting in areas where land is scarce and/or particularly expensive, for various reasons: necessity to preserve agricultural lands, in areas with a high population density, in small or island countries, in countries with lots of mountainous area Hydrelio® also tries to solve the issue of unused water surfaces for a positive purpose like generating green energy. Moreover, floating solar energy production and energy consumption can get closer to grid infrastructures as Hydrelio® can be placed in many water surfaces. The technology reduces solar exposure of water, therefore limiting water evaporation and also reducing algae growth and eutrophication which deteriorate the water’s quality. It is particularly interesting for irrigation ponds, dams or drinking water reservoirs for examples. Furthermore, solar cells are more efficient thanks to the natural cooling effect of the water.

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Label Date February 6, 2020
From France
Maturity stage Medium and large scale commercialization
Looking For Visibility ; Social acceptance : Support

Implementation Stories

Hydrelio® by Ciel & Terre International
Implemented by AKUO in Piolenc (France) in 2019

France's first floating solar power plant was inaugurated in October 2019 in Piolenc, Vaucluse, on a quarry lake. The Piolenc plant required an investment of 16 million euros, and was partly financed by a participatory financing campaign open to Vaucluse residents, with the participation of the town council. It took Akuo Energy 10 years to complete the project, which is based on floating solar panel technology Hydrelio.


With an output of 17 MW and comprising 47,000 photovoltaic panels, the plant can supply power to 4,700 homes.


The environmental benefits

  • Saves valuable land like natural areas or fields
  • The plastic used is 100% recyclable
  • No danger to existing ecosystems

The Financial benefits

  • Payback reached in 7 years
  • A 40% of electrical savings for the landowner

Activity Region

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  • Headquarters
  • Activity

Company Profile

Ciel & Terre International

Ciel & Terre is the pioneer and world leader of floating solar with 120+ projects using its patented Hydrelio® system.

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Related Topics

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The information set out above, is solely for the purposes of information and the Solar Impulse Foundation does not provide any guarantee as to its authenticity, completeness or accuracy. This information does not constitute investment advice or a recommendation to buy into, transact or to enter into any agreement with any of the parties or persons mentioned above. Potential investors or interested parties are solely responsible for their investment or business decisions and for performing any due diligence required by the circumstances. The innovator Ciel & Terre International has asserted ownership of the intellectual property rights for images, videos, and content showcased above, affirming full and unrestricted usage rights, and has provided explicit permission for the Solar Impulse Foundation to publish such information designated as "public" in the application form.