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Photovoltaic Solar Panels |
Generating electricity for home use using solar panels has been an option for several years now, and is increasingly more popular in the recent years. It looks a wonderful system to install, and more and more advisable, but a little fact-finding and an excellent project plan is advisable before embarking on your project. Solar panels are produced in varying sizes, from few watts to three or four hundred watts. The amount of electricity delivered from a panel is related directly to the area, and so a panel giving a high wattage of electrical power is going to be a lot bigger than for a smaller amount. An individual photovoltaic panel consists of little cells which produce a small quantity of power - the greater the number of cells, then the higher the panel wattage. On the downside, one of the biggest issues with photovoltaic panels is the price, which is a function of the production process, the basic materials, and the low efficiency of the energy transformation process. |
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The cells forming a complete solar electricity panel are really a variety of crystal lattice which is 'grown' in the shape of a cylinder, and then split into small pieces. Thin cuts of the lattice are fitted together, glued flat onto a aggregate wooden supporting board and tough piece glass covers the array. At the back there is an electrical box with several connections to configure, this configuration depends on the level voltage the panel is designed for. PV panels can be bought mostly for 48, 24 and 12 volts dc. DC means 'direct current', which is the same kind of electricity used in your car battery, or the batteries employed in small electrical items at home. A practical photovoltaic system used for the home should have complete control system for transforming the energy to a.c., or alternating current, which is the type used by your home's electrical wiring. The system will additionally convert the volts to be the same as the home supply voltage. The big disdavantage of solar photovoltaic solar panels is that they only have an efficiency of about thirteen percent, which means that if one thousand watts of energy from the sun shines on the panel surface, only one hundred and thirty watts will be produced for home use. One of these days, there could be a significant improvement, which coulde represent the saving of humanity in the quest for inexpensive energy that doesn't harm the planet. The energy we can get from the sun can vary a lot, and depends on your country, but let's say that the average amount is approximatelyone thousand watts for each square metre, and the panels just thirteen percent of this figure, then we would have to have an array of photovoltaic panels with a complete area of about eight square metres to produce one thousand watts of solar electrical power - really quite a small amount for the area. Another interesting use of photovoltaic electricity panels is to employ the smaller types used in low-power applications.
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