Solar Panels West Lothian
Further reading...
A solar panel (also solar module, photovoltaic module or photovoltaic panel) is a packaged, connected assembly of solar cells, also known as photovoltaic cells. The solar panel can be used as a component of a larger photovoltaic system to generate and supply electricity in commercial and residential applications.
Because a single solar panel can produce only a limited amount of power, many installations contain several panels. A photovoltaic system typically includes an array of solar panels, an inverter, and sometimes a battery and interconnection wiring.
Polycrystalline PV cells connected in a solar panel.
Solar panels use light energy (photons) from the sun to generate electricity through the photovoltaic effect. The structural (load carrying) member of a module can either be the top layer or the back layer. The majority of modules use wafer-based crystalline silicon cells or thin-film cells based on cadmium telluride or silicon. The conducting wires that take the current off the panels may contain silver, copper or other non-magnetic conductive transition metals.
The cells must be connected electrically to one another and to the rest of the system. Cells must also be protected from mechanical damage and moisture. Most solar panels are rigid, but semi-flexible ones are available, based on thin-film cells.
Electrical connections are made in series to achieve a desired output voltage and/or in parallel to provide a desired current capability.
Solar Panels West Lothian
Separate diodes may be needed to avoid reverse currents, in case of partial or total shading, and at night. The p-n junctions of mono-crystalline silicon cells may have adequate reverse current characteristics that these are not necessary. Reverse currents waste power and can also lead to overheating of shaded cells. Solar cells become less efficient at higher temperatures and installers try to provide good ventilation behind solar panels.
Some recent solar panel designs include concentrators in which light is focused by lenses or mirrors onto an array of smaller cells. This enables the use of cells with a high cost per unit area (such as gallium arsenide) in a cost-effective way.
Solar Panels West Lothian
Depending on construction, photovoltaic panels can produce electricity from a range of frequencies of light, but usually cannot cover the entire solar range (specifically, ultraviolet, infrared and low or diffused light). Hence much of the incident sunlight energy is wasted by solar panels, and they can give far higher efficiencies if illuminated with monochromatic light. Therefore, another design concept is to split the light into different wavelength ranges and direct the beams onto different cells tuned to those ranges. This has been projected to be capable of raising efficiency by 50%.
Currently the best achieved sunlight conversion rate (solar panel efficiency) is around 21% in commercial products, typically lower than the efficiencies of their cells in isolation. The energy density of a solar panel is the efficiency described in terms of peak power output per unit of surface area, commonly expressed in units of watts per square foot (W/ft2). The most efficient mass-produced solar panels have energy density values of greater than 13 W/ft2 (140 W/m2)
West Lothian
The county of West Lothian was called Linlithgowshire or the County of Linlithgow until 1921.
Before it was abolished in 1975 by the Local Government (Scotland) Act 1973, the county contained six burghs. Two are now outside the West Lothian unitary council area:
Armadale, Bathgate, Linlithgow, Whitburn, Bo'ness, Falkirk, South Queensferry
On abolition in 1975 the county, with the exception of the Bo'ness area, was included in the Lothian Region. Bo'ness became part of the Central Region. Lothian Region was divided into four districts, one of which was named West Lothian and approximated to the former county.
District (West Lothian)
West Lothian District was created in 1975, comprising the county of West Lothian; less the burghs of Bo'ness and South Queensferry and the Kirkliston area; it also included the East Calder and West Calder districts of the former county of Midlothian. The council's headquarters were originally in Bathgate, later moving to the new town of Livingston. The unitary authority created in 1996 used the same boundaries.
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