Can Floating Solar Generate Clean Energy and Support Aquatic Biodiversity?
Introduction
The expansion of renewable energy should not come at the expense of nature. As countries accelerate solar deployment, the challenge is to generate more clean electricity while limiting pressure on land, water and ecosystems.
Floating photovoltaic technology offers a promising response. By installing solar power plants on suitable water surfaces, floating solar can produce renewable electricity without occupying valuable terrestrial land. When projects are carefully designed, they may also create opportunities to protect, restore or enhance aquatic habitats.
At HelioRec, we believe that floating solar infrastructure should be developed as part of the surrounding ecosystem - not simply placed on top of it.
Beyond Clean Energy Generation
Floating solar power plants can make productive use of artificial and already modified water bodies, including port basins, industrial reservoirs, quarries and water-treatment facilities.
This approach can deliver several benefits:
Renewable electricity generated close to local consumers
Reduced competition with agricultural and urban land
Productive use of underutilised water surfaces
Potential integration with ecological restoration measures
New environmental data through long-term site monitoring
The European Commission’s Joint Research Centre has identified floating PV as one of the solar applications that could help Europe increase renewable energy generation while limiting additional land-use pressure.
However, every aquatic environment is different. Water depth, circulation, light penetration, sediment, existing species, birds, fish and human activities must all be considered before determining whether floating solar is appropriate for a particular site.
Designing Floating Solar for Marine and Coastal Conditions
Nearshore and port environments present demanding technical conditions, including waves, tides, strong winds, salinity and corrosion.
HelioRec develops floating solar technology specifically for these environments. Our modular platforms, flexible connections and marine-inspired engineering are designed to withstand dynamic loads while supporting practical installation, inspection and maintenance.
Technical resilience is only one part of responsible project development. The interaction between the power plant and its surrounding environment must also be evaluated throughout the project lifecycle—from site selection and environmental assessment to construction, operation and decommissioning.
How Floating Solar Could Support Biodiversity
Depending on the characteristics and ecological objectives of a site, biodiversity measures may be incorporated into the floating solar project.
These solutions should be developed with environmental specialists and selected only after completing the necessary ecological studies.
Eco-Designed Mooring and Anchoring Solutions
Anchors are essential for keeping a floating solar power plant safely in position. In certain environments, conventional concrete structures may be replaced or complemented by eco-designed elements with textured surfaces, cavities or complex geometries.
These structures can provide attachment surfaces and shelter for algae, molluscs, crustaceans and small fish. Over time, they may function as habitat structures while continuing to perform their primary engineering role.
The final solution must remain compatible with seabed conditions, mooring loads, environmental requirements and maintenance operations.
Artificial Reef Structures
Artificial reef elements or specially designed habitat modules may be installed around or beneath a floating solar platform where local conditions allow.
Their complex surfaces can provide shelter, attachment areas and potential nursery habitats for marine organisms. Technologies such as 3D printing also make it possible to create structures adapted to selected species and environmental conditions.
Such solutions are not appropriate for every location. They require careful material selection, ecological assessment, permitting and long-term monitoring to confirm that they provide a genuine environmental benefit.
Habitat Ropes and Biofiltration
Ropes or other suspended habitat structures may encourage colonisation by mussels and other filter-feeding organisms in suitable waters.
Mussels naturally filter suspended particles from water and can form habitats for additional species. This creates potential opportunities to combine renewable energy infrastructure with ecological enhancement or carefully managed aquaculture.
The introduction of these systems must be based on local water quality, carrying capacity and species assessments. Monitoring is essential to avoid introducing invasive species or creating unintended changes to the ecosystem.
Protected Areas Beneath the Platform
The space beneath and around a floating solar platform may provide shade and shelter from certain human activities.
In some settings, this could create a calmer habitat for fish and other organisms. However, shading also changes the amount of light reaching the water and may influence temperature, aquatic vegetation and dissolved oxygen.
For this reason, array coverage, spacing and layout must be adapted to the specific water body. Biodiversity benefits should be demonstrated through data rather than assumed.
Monitoring Is Essential
The environmental effects of floating solar depend heavily on the site and the design of the installation. Monitoring is therefore a central part of responsible project development.
A monitoring programme may include:
Water temperature and dissolved oxygen
Turbidity and water quality
Underwater light levels
Fish and invertebrate populations
Bird activity
Biofouling and colonisation
Seabed and habitat conditions
Changes recorded before and after installation
HelioRec’s AquaSense monitoring platform is designed to combine environmental, structural and energy-performance information within one intelligent dashboard. Depending on the project, it can integrate data from wave and wind sensors, temperature probes, irradiance sensors, inclinometers, mooring load cells, energy meters and live site imaging.
This combined approach can help project owners understand both how the power plant is performing and how it interacts with its environment.
A Site-Specific and Science-Based Approach
Floating solar should not automatically be described as biodiversity-positive. Poorly selected or excessively covered sites could affect light penetration, water temperature, oxygen levels, aquatic vegetation, birds or other species.
A responsible project should therefore follow several principles:
Prioritise artificial, industrial or already modified water bodies.
Avoid ecologically sensitive areas unless robust studies demonstrate compatibility.
Establish an environmental baseline before installation.
Adapt the layout and coverage ratio to local conditions.
Work with ecologists, local authorities and water users.
Use environmentally compatible materials.
Monitor impacts throughout the project lifecycle.
Adjust mitigation measures when monitoring identifies a risk.
This approach turns biodiversity from a general promise into a measurable project objective.
Clean Energy Infrastructure Designed with Nature
Floating solar can contribute to decarbonisation while reducing pressure on land. With thoughtful site selection, ecological expertise and long-term monitoring, it may also become a platform for habitat enhancement and environmental research.
The objective is not simply to generate electricity on water. It is to develop clean energy infrastructure that is technically resilient, environmentally responsible and adapted to the needs of each site.
At HelioRec, we are working to make this vision practical by combining floating solar engineering, environmental monitoring and site-specific biodiversity solutions.
If you are developing a floating solar project in a port, industrial basin, reservoir or nearshore environment, contact HelioRec to explore a solution adapted to your site.
FAQs
Can floating solar improve aquatic biodiversity?
Floating solar can create opportunities for habitat enhancement when biodiversity measures are designed for the specific site. Eco-designed anchors, artificial reef structures and suspended habitat ropes may provide shelter or attachment surfaces for aquatic organisms. However, ecological benefits must be assessed and confirmed through monitoring rather than assumed.
Can floating solar negatively affect aquatic ecosystems?
Like any infrastructure, floating solar can create environmental impacts if it is installed in an unsuitable location or covers too much of the water surface. Potential effects include changes in underwater light, water temperature, oxygen levels, aquatic vegetation and the behaviour of birds or fish. Appropriate site selection, environmental studies and an adapted coverage ratio help reduce these risks.
How can the environmental impact of floating solar be monitored?
Monitoring can combine water-quality measurements with ecological, structural and energy-performance data. Parameters may include water temperature, dissolved oxygen, turbidity, underwater light, bird activity, fish populations, biofouling and habitat colonisation.
HelioRec’s AquaSense platform can integrate environmental sensors with information about waves, wind, irradiance, platform inclination, mooring loads and electricity generation in one monitoring dashboard.
Are HelioRec’s biodiversity solutions available for every project?
YBiodiversity solutions are developed on a site-specific basis. HelioRec works with project owners, environmental specialists and technical partners to identify measures that are appropriate for the local ecosystem, regulatory framework and operational requirements. Not every solution is suitable for every site.
HelioRec designs, manufactures, and deploys floating solar systems for both inland and marine nearshore environments. To discuss whether floating solar is suited to your site, *contact us
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