Reduction of water evaporation using AFLOAT SOLAR Systems

Floating solar


Floating Solar by its inherent unique design naturally covers the area of the water surface producing much needed shading.

This shading provides 2 main features:


  1. Inhibits evaporation of water in the catchment area below while preserving precious water that would otherwise disappear from the water catchment area.


2.   Inhibits the growth of Algae.


Afloat systems are safe for fresh water systems and does not cause any environmental issues by its implementation.


Studying data from previously installed sites we found that installed floating solar systems showed a reduction in evaporation of about 500 litres / m² / year, corresponding to a reduction of about 80% of normal evaporation in the absence of floating systems. From these assessments we can see that on the surface covered by the floating systems evaporation is reduced by two fundamental factors:

  • Dramatically intercepting and reducing wind over the water surface, can yield up to a 50% reduction.

  • The shading produced by our floating systems over the utilized water surface can yield a reduction of approximately 30%.

The total volume of saved water on a project will be directly dependent on the size of the floating Solar system, for example a floating system approximately 11,000 square meters equates to around 1MWp. Resulting in a saving 5.5 million liters of water per year, or 5.500 Mc / year per MWP of a floating system.




For an example of shade creation to inhibit water evaporation we can look at California. Over the past 10 years California has been subjected to an unprecedented water crisis.

In 2015 to combat the significant natural evaporation water loss in the city's reservoirs, basins and water reserves, 96 million plastic balls (HDPEs) were used to cover the Los Angeles basins, attempting to block the sunlight and avoiding water evaporation.

The target of this exercise was to save approximately 300 million litres of water per annum.