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NRG ISLAND - Floating PV Plants

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"NRG ISLAND" is a patented system designed tomaximize electricity generation by using floatingphotovoltaic panels installed on any waterbasins.

Production of the floating photovoltaic systemcan increase from 10% to 20% compared to asimilarly grounded plant, thanks to its proximity towater’s surface and to the reflected light whichreaches the solar photovoltaic panels.

NRG ISLAND System is modular and replicable inwidth and length so you can achieve the desired

power.

The floating system is rigid and stable: the floatsprovide support for the structures and panels andprovide a floor plan for ordinary inspection andmaintenance operations

NRG ISLAND is the innovative system for installing photovoltaic systems on water

FLOATING SOLAR SYSTEMS born as an alternative solution to large plants on the ground, avoiding to exploit agricultural land for the production of energy.

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The scarcity of adequate land surfaces for the development of photovoltaic projects, the times of plant construction, the regulatory constraints and the

cost of land for agricultural use limited installation of photovoltaic solar systems over time.

Instead everywhere there is a great deal of available artificial or natural water basins used for industrial or irrigation purposes and generally for water

supply. Producing solar energy from basins allows you to benefit from an environmental, social and economic point of view.

The reasons for choosing Floating Photovoltaic

TradiTional

STANDARD PV PLANT VS FLOATING PV PLANT

Floating

• Necessity of extensive land

• Purchase or leasing of land

• Limited installation conditions

(eg shading)

• Reduced efficiency due to

high ground temperatures

• Environmental pollution

• Deforestation

• Using inactive spaces

• Retraining of disused spaces

(quarries, reservoirs, etc.)

• Favorable installation

conditions (eg shading

prevention)

• Increased efficiency thanks

to:

Refractive use

Cooling of panels

• Echo system protection

Thanks to its modularity and ease

of installation, floating systems

can be easily installed in:

Industrial water systems

Cave / mine lakes

Irrigation tanks

Desalination plants

Digestive / Canal

Aquaculture Surfaces

Water treatment plants

Fish Farms

FLOATING PV PLANT’S APPLICATIONS

Environmental Benefits• Zero environmental impact

• Minimizes the evaporation

phenomenon

• Preserve the existing ecosystem

• Reduces algae flowering

• Redevelopment of disused water

basins

Social Benefits• Recovers contaminated areas by

generating clean energy

• Plots intended for agricultural or

other uses are not exploited

Economic Benefits• Converts unused basins to

profitable areas

• Increases efficiency and power

generation

• Reduces connection costs to

electricity distribution centers

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Benefits in detail: higher performance than a traditional plant

The first important benefit comes from refraction of water. The water's ability to reflect and amplify sunlight allows the plant to capture more light and

generate more energy. Not only that: aquatic installations allow solar panels to work at lower temperatures, avoiding overheating of cells. However

overheating of panels in ground installations results in significant performance drops despite optimum levels of irradiation. Indeed, each photovoltaic

panel has an optimum operating temperature of between 20 and 25 degrees, with increasing temperature decreasing the cell performance.

Finally, even in winter, in the morning, despite the low temperatures, thanks to the water-reducing effect, the panels are defrosted 1 hour earlier than the

traditional ones; this is an early start of production.

35° tilt of panels

Orientation of

the panels 0°

5° tilt of panels

Orientation of

the panels 0° Comparing the yields of the two types of plants during the year and

taking into account the variations in temperature, the floating plant

overall has an increase of + 10% / 20% of annual production.

- Year-on-year performance plants’ comparison -

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Benefits in detail: Reduction of water evaporation

By covering a significant surface on a reservoir, the system reduces evaporation while the shading resulting from its panels limits the growth of algae. In

addition, the system does not constitute dangers to wildlife and surrounding habitat, as it does not release waste or substances of any kind.

Empirical studies on some of the installed systems showed a reduction in evaporation of

about 500 liters / m² / year, corresponding to a reduction of about 80% of normal

evaporation in the absence of implants. From these studies we can see that on the surface

covered by the plant evaporation is reduced by the action of two fundamental factors:

• Eliminating the wind component, which allows for a 50% reduction;

• The shade of the aquatic surface, guaranteed by the photovoltaic modules, allows a

reduction of 30%.

The total volume of saved water will depend by covered surface, which for a floating

photovoltaic plant is estimated to be about 11,000 square meters for each photovoltaic

MWp.

This means saving 5.5 million liters of water per year, or 5.500 Mc / year per MWp of a

photovoltaic field.

A practical application example:

Over the past 10 years California has been subjected to an unprecedented

Water Crisis. In 2015 to try to stem the significant water loss in the city's reservoirs

basins and water reserves, 96 million plastic balls (HDPEs) were used to cover the

Los Angeles basins, blocking the sunlight and avoiding water evaporation.

All this is designed to save about 300 million liters of water every year.

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The floats provide support frames, engaging with them to form a rigid and stable

system, allowing operators to walk on every row of floats even with trolleys or

equipment in order to allow proper monitoring and maintenance of the

photovoltaic system.

Another advantage is the ability to allow operators to easily orient the panels to

sunlight and to create a "tracking" system that can maximize overall plant

productivity.

Benefits in detail: ease of installation and maintenance

NRG ISLAND system is modular. Easy to assemble, it is mounted directly on the shore of the water basin. Floating modules are made of high density

polyethylene, (HDPE) joined together by special connectors and aluminum or stainless steel structures that also support photovoltaic panels.

Each module consists of 4 floats and 1 aluminum or stainless steel frame

supporting 4 photovoltaic panels.

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Locations and contacts:

Imola (BO) - Via I° Maggio 70/b, 40026+39 0542 55201 - mob. +39 340 6009639

Camaiore (LU) - Via dei Carpentieri n.41, 55041+39 0584 1840115 - mob. +39 349 6950184

www.nrgisland.com

info@nrgisland.com