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Photovoltaic Systems

We install a wide range of photovoltaic systems including:·
  • Solar PV roof mounted
  • Solar PV roof integrated
  • Ground mounted
  • Grid connected
  • Solar tracker systems

Photovoltaic Modules

  • Photovoltaic (PV) panels are guaranteed to last for at least 25 years and produce no carbon dioxide (CO2) within their operating lifetime
  • They have no moving parts and require little maintenance
  • They produce electricity where it is used, so energy is not lost moving it around
  • The cells are made from semi-conducting materials
  • PV Panels can be used on any building or piece of land
  • Electricity produced from PV technology can be incorporated into tiles, shingles and glass laminates as well as standard modules.
  • Grid connection allows PV owners to sell surplus electricity

Photovoltaic Inverters

Typically we use SMA inverters. SMA are technological leaders in the manufacture of highly efficient solar inverters for any installation size regardless of the type of solar module (panel). The inverter is technologically the most important component in any solar power system. It converts the direct current generated in photovoltaic cells into alternating current suitable for the grid. Inverters are guaranteed for 5 years and can be extended to 10 years plus.
 
SMA SUNNY BEAM with Bluetooth

The Sunny Beam with Bluetooth looks good and is packed with innovative monitoring technology. The large graphic display shows you all the essential data at a glance: daily profile, current output, daily and overall energy yield. But there's more to the Sunny Beam than meets the eye: at the flick of a switch you can retrieve the performance data of up to 12 inverters, a monthly summary, the energy yield in £'s or the saved quantity of CO2. The data from a minimum of 100 days' performance is stored within the device and can be uploaded to a PC via USB interface - no additional software is required. And in case of plant disruption, the Sunny Beam can be programmed to emit an audio signal.

Photovoltaic Mounting System

We also typically use Schüco for the mounting system. The PV light substructure system offers the right fixing units and the right fixing anchors for every module construction type and for every type of roof covering. The system components of the substructure have been tested both together and individually for structural strength. Mounting systems are guaranteed for 5 years.
 
Different Types of photovoltaic panels
 
Hybrid cells: HIT solar cells
 
The HIT solar cell is a combination of a crystalline and a thin-film solar cell.  HIT (heterojunction with intrinsic thin layer) refers to the structure of these hybrid solar cells.  This comprises crystalline and amorphous silicon that is bonded with an addiitonal un-doped thin film (intrinsic film layer).  A monocrystalline wafer forms the core of the HIT cell and is coated on both sides with a thin layer of amorphous silicon.  The efficiency of the hybrid module is 18.5%
 
Monocrystalline

Each module is formed from a single silicon crystal. The process used to make monocrystalline panels is energy and materially intensive and therefore these panels are expensive. Typically they produce the most efficient commercial cells and converts 15% of solar energy into electrical power.

Multicrystalline

Modules are formed from a cast block of silicon which results in aesthetically pleasing random formation of crystals.  Because of the random direction of the crystals, the efficiency of conversion of solar radiation is lower, between 8-12% and is a cheaper alternative than monocrystalline.

Amorphous silicon (thin film)

It has no long range crystal structure and therefore is quite inefficient and can be produced as thin as 1/1000mm.  It is easy to mass produce at low temperatures and with low material input and therefore is cheap to produce.  Because the layers are so thin it is possible to use this type of material on curved surfaces.

Cadmium telluride and copper indium diselenide

This is another form of ‘thin film’ technology which uses a different semi conductor material to silicon.

Building Integrated PV (BIPV)
 
Building-integrated photovoltaics (BIPV) are photovoltaic materials that are used to replace conventional building materials in parts of the building envelope such as the roof, skylights, or facades. They are increasingly being incorporated into the construction of new buildings as a principal or ancillary source of electrical power, although existing buildings may be retrofitted with BIPV modules as well. The advantage of integrated photovoltaics over more common non-integrated systems is that the initial cost can be offset by reducing the amount spent on building materials and labour that would normally be used to construct the part of the building that the BIPV modules replace. These advantages make BIPV one of the fastest growing segments of the photovoltaic industry.
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Solar Electric Panel Installers Abingdon, Oxford, Oxfordshire
 
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