ECO Group Ltd.

Today we can offer over 65 different tailor made options for househoulds from €4,400* incl VAT and installation for 3kW peak system.

*Price net of Goverment Grant 2016

Solar Photovoltaic Energy
We can also change the sunlight directly to electricity using solar cells.

Renewable Energy Rources RES

Solar cells are also called photovoltaic cells - or PV cells for short and can be found on many small appliances, like calculators, and even on spacecraft. They were first developed in the 1950s for use on U.S. space satellites. They are made of silicon, a special type of melted sand. When sunlight strikes the solar cell, electrons (red circles) are knocked loose. They move toward the treated front surface (dark blue colour). An electron imbalance is created between the front and back.

Construction of PV Panels - Source: Renewable Energy Trust

As seen in the science behind PV, a photovoltaic cell is created when a positively charged semiconductor is placed against a negatively charged semiconductor to create a diode. In practice, this semiconductor sandwich is combined with supporting materials to create panels that can then be arranged in arrays to provide different amounts of electricity. Creating the Photovoltaic Cell As seen in the science behind PV, a photovoltaic cell is created when a positively charged (P-type) layer of silicon is placed against a negatively charged (N-type) layer of silicon to create a diode and this diode is connected in a circuit via metal conductors on the top and bottom of the silicon sandwich. An actual PV cell includes these elements with an anti-reflective coating to accept more sunlight into the silicon sandwich.

1: The photovoltaic cell, a sandwich of two semiconductor materials. The cell reacts to solar energy and produces an electrical charge.

2: Metal conductor strips that run along the top layer of silicon. These strips capture the electrons freed when solar energy hits the cell and concentrate them into a current. Another metal panel, attached to the bottom layer of silicon, feeds electrons back into the cell.

2: An anti-reflective coating placed on top of or directly adhered to the silicon sandwich. This sheet reduces the amount of sunlight reflected off the glass allowing more sunlight to hit the cell and increasing the panel's efficiency.

Creating the Photovoltaic Panel

While the photovoltaic cell is the central element in a photovoltaic system, the photovoltaic panel is what we actually use to make a cell or group of cells usable. Once in panel form, photovoltaics can be used alone or in groups of panels to power many different electrical loads. Though different types of photovoltaics vary in their structure, they generally include the following elements:

1: The cell or multiple cells are the core of the photovoltaic panel.

2: A glass cover placed over the photovoltaic cell to protect it from the elements while allowing sunlight to pass through to the cell.

3: An additional plastic anti-reflective sheet is often used to enhance the effect of the glass cover and anti-reflective coating of the cell to block reflection.

4: A panel backing (typically plastic) and frame complete the photovoltaic panel, holding all the pieces together and protecting it from damage during installation.

Putting Panels in an Array Finally

There are arrays of panels. These are created when multiple panels are connected together to form a larger circuit.

Basic Panels

Monocrystalline Silicon

Panels Monocrystalline panels use crystalline silicon, a basic semiconductor material. Crystalline silicon is produced in large sheets that can be cut to a specific size and used as one large cell in a panel. Conducting metal strips are laid over the entire cell to collect electrons from the cell into an electrical current. These panels are more expensive to produce than the polycrystalline panels that follow. However, they are highly efficient and are often more cost-effective in the long run as a result. Monocrystalline panels are typically 15-18% efficient, meaning that for every unit of solar energy that hits the cell, the panel can convert 15-18% of this energy into electricity.

Polycrystalline Silicon

Panels Polycrystalline, or multicrystalline, photovoltaics use a series of cells in place of the single large cell used in monocrystalline panels. Polycrystalline photovoltaics are the lease expensive form of photovoltaics available today, though the costs of producing individual cells can still be high. The drawback of these panels is that they have lower efficiency rates than monocrystalline panels, at 12-14% efficiency.

Our Partners for Solar Panels

Sunerg SOLAR is one of the leading Italian manufacturers of photovoltaic panels (PV) modules and a package of solar system kits provider. Sunerg solar greatest secrets success lies in the constant quest for innovation technology to make the most of "solar energy. The production and design of renewable products since 1978. Today Sunerg has been partnered with companies like TIGO, Power-One(ABB), SMA & UNI-Solar.

Visit Sainty Solar Website

Our Partners for Solar Panels

Sainty SOLAR is one of the leading partially vertically integrated manufacturers of crystalline photovoltaic (PV) modules and a package of solar system kits provider. Sainty SOLAR is a subsidiary of Sainty International Group, which was founded in 1978 and has grown into one of the largest corporations in China, with total assets reaching USD 17.5 billion, after merging with Jiangsu Guoxin Investment Group Limited in May, 2010.

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Our Partners for Solar Panels

Only in Steca has long stood for ideas and innovations as an electronic manufacturing services (EMS) provider and manufacturer of Steca brand product lines in solar electronics and battery charging systems. As a leading supplier of products for the solar electronics industry, Steca sets the international standard for the regulation and control of solar energy systems. In the three market segments PV grid connected, PV off grid and Solar thermal, the Steca brand is synonymous with innovation and vision. In conception, development, production and marketing, the company is committed to the highest quality standards.

Inverter topology The new „coolcept“ inverter topology, with an innovative circuit design that achieves highest efficiency, has now been integrated into these StecaGrid inverters. The „coolcept“ inverter topology is based on a single-stage transformerless switching concept that uses proven standard components to implement symmetric step-down converters with downstream pole-reversing circuits.The high efficiency results in a peak efficiency of 98.6 %

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Our Partners for the Inverters

Power One
Currently the second largest manufacturer of solar power inverters globally, Power-One’s Renewable Energy Solutions has seen remarkable growth in the past 12 months. 
Micro Inverters
Another aspect in designing a highly efficient power solution is to consider overall architecture of the solar installation. For an architecture with one inverter per solar panel, the inverter, known as a micro-inverter will be a lower efficiency due to the economies of scale for the power conversion. This one to one relationship of solar panel to inverter does allow the inverter to select the optimum power level for that solar panel and not for the average of multiple solar panels connected in parallel. The AURORA MICRO -0.3-I offers 95.5% maximum efficiency and is installed on each solar panel in an installation.

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Our Partners for the Inverters

SMA Technologie AG was founded as an independent company out of Kassel's University in 1981 with the vision to develop and produce intelligent computer-based control systems for decentralized energy supply. This vision resulted in sophisticated products that are fail-safe and extremely reliable. Especially an energy supply system has to guarantee long-term trouble-free operation.

Due to SMA know-how from 20 years of experience in the development and fabrication of system technology for photovoltaic, wind energy and combined power generation plants, continuous product improvements and the use of absolutely new technologies, SMA is a pioneer in the field of solar technology.

Sunny Boy inverter makes SMA the worldwide market leaders in the field of innovative device technology for the use of renewable energy sources. Private, commercial and institutional owners of solar power plants rely on SMA photovoltaic inverters and the numerous possibilities of a wide range of different communication systems. Due to own ultramodern electronics manufacturing SMA ensure the quality, reliability, and up-to-date technology of the components being developed.

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