Mitigating Water Loss and Evaporation through Floating Solar FPV Systems


Water scarcity and the conservation of water resources have become critical global challenges. In this context, floating solar photovoltaic (FPV) systems offer a unique opportunity to not only generate renewable energy but also mitigate water loss and evaporation from water bodies. This article aims to explore the potential of floating solar FPV systems in reducing water loss and evaporation, thus contributing to sustainable water management.

  1. Reduction in Evaporation Rates

    Water bodies are susceptible to high evaporation rates, which result in significant water loss and environmental challenges. Floating solar FPV systems provide a solution by covering a portion of the water surface with solar panels, thereby reducing direct exposure to sunlight and limiting evaporation rates. Studies have shown that floating solar installations can reduce evaporation by up to 70% compared to uncovered water surfaces. This reduction in evaporation helps to conserve water resources, particularly in regions facing water scarcity.

  2. Shade Effect and Temperature Regulation

    The shading effect created by floating solar panels plays a crucial role in mitigating evaporation. The shade provided by the panels prevents direct sunlight from reaching the water surface, reducing heat absorption and subsequently lowering water temperatures. Cooler water temperatures result in reduced evaporation rates, preserving water resources. Additionally, the shade effect can help inhibit the growth of algae and aquatic weeds, further contributing to water conservation efforts.

  3. Prevention of Algae Blooms

    Excessive exposure to sunlight can promote the growth of algae in water bodies, leading to the formation of harmful algae blooms (HABs). These blooms can deplete oxygen levels in the water, harm aquatic ecosystems, and compromise water quality. Floating solar FPV systems, by creating shade on the water surface, limit the availability of sunlight necessary for algae growth. This shading effect helps to prevent the formation of HABs, promoting a healthier and more balanced aquatic environment.

  4. Synergy with Water Reservoirs and Irrigation Systems

    Floating solar FPV systems can be strategically deployed in conjunction with water reservoirs and irrigation systems, offering additional benefits for water management. By covering reservoirs with floating solar panels, evaporation rates can be significantly reduced, increasing water availability for agricultural irrigation and other uses. This integration optimizes the use of water resources, contributing to more sustainable and efficient water management practices.

  5. Environmental and Economic Co-Benefits

    In addition to the water conservation benefits, floating solar FPV systems offer environmental and economic co-benefits. By utilizing water bodies instead of land, these installations minimize the need for land acquisition, preserving terrestrial ecosystems. Moreover, the generation of clean and renewable energy helps reduce greenhouse gas emissions and mitigate climate change. Additionally, the cost-effectiveness and scalability of floating solar systems make them economically viable, contributing to the transition to a greener and more sustainable energy future.


Floating solar FPV systems provide an innovative approach to mitigate water loss and evaporation from water bodies. By reducing evaporation rates through shade, temperature regulation, and preventing algae blooms, these systems offer practical solutions to address water scarcity and promote sustainable water management. Furthermore, the integration of floating solar with water reservoirs and irrigation systems enhances water availability for various purposes. The co-benefits of environmental preservation and economic viability make floating solar FPV systems a promising technology for ensuring both water and energy sustainability. Continued research, technological advancements, and supportive policies are crucial to unlocking the full potential of floating solar FPV systems in mitigating water loss and promoting sustainable water resource management.

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