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What is Solar PV? A guide to Solar Energy

Want to know more about how solar panels work? Where the best places to use them are, and how to use them in business? Find this guide a helpful resource to find out what is solar PV and the advantages and disadvantages of solar PV.

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Harnessing Energy from the Sun through Solar Energy Panels

Almost all countries are now very dependent in energy resources derived from fossil fuels. However, this energy is a nonrenewable resource and is now rapidly depleting due to abuse and overconsumption. Humans have been uncaringly producing and using …

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There Is A Lot Of Energy In Sunlight And That Energy Can Be Converted

So why would any one plan to make his very own solar panel setup? After all, can’t these components be bought from producers? Even though this is the case, a problem is in fact that photovoltaic set ups ordered from business providers usually are tremendously high priced. You’ll actually save a large amount of by constructing their very own own. They’re also less of a challenge to prepare than you may realise.

Driven by advances in technology and increases in manufacturing scale and sophistication, the cost of photovoltaics has declined steadily since the first solar cells were manufactured, and the levelised cost of electricity (LCOE) from PV is competitive with conventional electricity sources in an expanding list of geographic regions. Net metering and financial incentives, such as preferential feed-in tariffs for solar-generated electricity, have supported solar PV installations in many countries. With current technology, photovoltaics recoup the energy needed to manufacture them in 3 to 4 years. Anticipated technology would reduce time needed to recoup the energy to 1 to 2 years.

What is Photovoltaic solar power? Photovoltaic solar energy has been around for many years and is a basic use of solar power or solar energy used in a modern environment. To get a better understanding the word Photovoltaic it is highly suggested that you do some research online to fully understand this technology.

Some photovoltaic systems, such as rooftop installations, can supply power directly to an electricity user. In these cases, the installation can be competitive when the output cost matches the price at which the user pays for his electricity consumption. This situation is sometimes called ‘retail grid parity’, ‘socket parity’ or ‘dynamic grid parity’. Research carried out by UN-Energy in 2012 suggests areas of sunny countries with high electricity prices, such as Italy, Spain and Australia, and areas using diesel generators, have reached retail grid parity.

Photovoltaic systems require high quality silicon. Although worldwide there are only a few manufacturers of the silicon wafers required (thin wafers of almost pure silicon), production capacities are increasing all the time. Silicon has a decisive social advantage in that unlike oil, sand is available in limitless quantities everywhere, thereby avoiding damage to or conflicts with the environment. Silicon, after all, is the second most abundant element on Earth after oxygen. Sand, quartz or semi-precious stones like amethyst or opals consist essentially of silicon.

With 100 Watt Monocrystalline Photovoltaic (PV) Solar Panel, a Nominal Output Voltage of 12V and Grade A Solar Cells with 17% efficiency, and a maximum voltage of 18.5v, the Ramsond solar panels are some of the most highly rated available to buy. With a series of great reviews online, and built for handling any weather conditions, these 22.7V open circuit voltage solar panels offer you the solar power that you are after. With maximum currents of 5.41A and a short circuit current of 5.55, it’s well worth considering if you need a high value and well-priced solar panel, then look no further.

Solar photovoltaics is growing rapidly, albeit from a small base, to a total global capacity of 102,156 megawatts (MW) at the end of 201The total power output of the world’s PV capacity in a calendar year is equal to some 110 billion kWh of electricity. This is sufficient to cover the annual power supply needs of over 20 million households in the world, and represents 0.5% of worldwide electricity demand. More than 100 countries use solar PV. World solar PV capacity (grid-connected) was 7.6 GW in 2007, 16 GW in 2008, 23 GW in 2009, and 40 GW in 2010. Installations may be ground-mounted (and sometimes integrated with farming and grazing) or built into the roof or walls of a building (building-integrated photovoltaics). Photovoltaics is now, after hydro and wind power, the third most important renewable energy source in terms of globally installed capacity.

Photovoltaic systems use no fuel and modules typically last 25 to 40 years. The cost of installation is almost the only cost, as there is very little maintenance required. Installation cost is measured in $/watt or €/watt. The electricity generated is sold for c/kWh. 1 watt of installed photovoltaics generates roughly 1 to 2 kWh/year, as a result of the local insolation. The product of the local cost of electricity and the insolation determines the break even point for solar power. The International Conference on Solar Photovoltaic Investments, organized by EPIA, has estimated that PV systems will pay back their investors in 8 to 12 years. As a result, since 2006 it has been economical for investors to install photovoltaics for free in return for a long term power purchase agreement. Fifty percent of commercial systems were installed in this manner in 2007 and over 90% by 2009.

High concentration photovoltaics (HCPV) systems employ concentrating optics consisting of dish reflectors or fresnel lenses that concentrate sunlight to intensities of 1000 suns or more. The solar cells require high-capacity heat sinks to prevent thermal destruction and to manage temperature related electrical performance and life expectancy losses. To further exacerbate the concentrated cooling design, the heat sink must be passive, otherwise the power required for active cooling will reduce the overall efficiency and economy. Multijunction solar cells are currently favored over single junction cells, as they are more efficient and have a lower temperature coefficient (less loss in efficiency with an increase in temperature). The efficiency of both cell types rises with increased concentration; multijunction efficiency rises faster . Multijunction solar cells, originally designed for non-concentrating space-based satellites, have been re-designed due to the high-current density encountered with CPV (typically 8 A/cm2 at 500 suns). Though the cost of multijunction solar cells is roughly 100 times that of silicon cells of the same area, the small cell area employed makes the relative costs of cells in each system comparable and the system economics favor the multijunction cells. Multijunction cell efficiency has now reached 44% in production cells.

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