Photovoltaic systems use solar cells to capture sunlight and convert that energy into electricity. Such systems can homeowners to generate electricity in a clean, reliable and quiet way that the cost of the future cost of electricity to offset and reduce their dependence on the grid.
Photovoltaic cells are usually made of modified silicon, or other semi-conducting materials that absorb and convert sunlight into electricity. Photovoltaic cells are long (the first PV system ever installed in the US – in 1954 – is still active today). Most manufacturers guarantee their products’ equity of at least 20 years. But most solar professionals agree that a system should last at least 25 -. 30 years old
Types of solar cells
There are three basic types of photovoltaic modules: monocrystalline, polycrystalline and thin film. All modules work well although monocrystalline cells often deliver the greatest efficiency. Thin-film technology usually costs less and improves efficiency increasing as the demand to grow solar panels. A growing number of manufacturers and models available in the market today. A solar-pro you through the pros and cons of each system allowing you to find a design that performs optimally over its multi-decade long life for your application.
How solar electric systems work
Photovoltaic panels are often installed on a roof and wired into a building through an inverter. The inverter converts the direct current (DC) power generated by the solar panels to alternating current (AC), the most common form of power is used to power buildings in the United States.
Orient solar panels facing south maximizes collect the effectiveness of energy, and most roofs – from flat to 60 degrees – suitable for photovoltaic cells
Orient solar panels facing south to maximize the effectiveness of energy collecting, and most of the roofs. – From flat to 60 degrees – suitable for photovoltaic cells
Solar vs Building integrated photovoltaic products (BIPV)
Solar panels are flat panels photovoltaic arrays mounted. a roof or a pole to catch the sun’s rays. They are the traditional arrays used to capture energy from the sun. Because of their stand design, solar panels are great for home retrofits and remodels.
Photovoltaic cells, however, increasingly integrated into building elements such as windows, walls and roof tiles. The effect creates a seamless integration into the design of a building since the BIPV components essentially disappear into the skin of your house. BIPV products work particularly well for new home construction or major renovation. And because BIPV panels are made for both photovoltaic and thermal systems for the collection, designers often install both technologies side-by-side to further maximize efficiency.
Source: http://ezinearticles.com/?Photovoltaic-(PV)-Electric-Systems&id=940464 by Danny Vo