Solar energy, as a renewable energy, is the direct solar energy conversion and utilization. Solar radiation conversion device converts energy use which belongs to solar thermal technology, the recycling heat energy is called solar thermal power generation, it also belongs to this technology area; solar radiation conversion device converts energy utilization is solar power generation technology, photoelectric conversion device usually uses the photoelectric conversion semiconductor devices, via the photovoltaic effect principle, also known as solar photovoltaic technology, and so appears a solar power system of grid and off grid solar power system. In the 1950s, there are two major technological breakthroughs in the field of solar energy utilization: one is the utility-type monocrystalline silicon cells, and the second is the 1955 Israel Tabor selective put forward the concepts and theories and the successful development of selective solar absorbing coating. These two technological breakthroughs laid the technical foundation for the use of solar energy into the modern period of development.
Choice of Solar Panels
The so-called output power of the solar cell we said is Wp under a standard solar light condition, namely: 101 standard of the European Commission defined radiation intensity 1000W/m2, air quality AM1.5, a battery temperature of 25 ° C under the conditions of the solar cell output power. The solar panels 500w are suitable for many families with the standard configuration. This condition is about and usually sunny day around noon sunlight conditions almost, this is not just as some people imagine, as long as there is sunshine, there will be a rated output power, even solar cells under fluorescent lights at night can also be used normally. This means that the output power of the solar cell is random, at different times, in different locations, the same piece of the output power of the solar cell is different.
Characteristics of the Solar Panels
Solar panels are a huge PN junction, which convert solar energy into electricity. As for the monolithic solar battery, it is a small PN junction, in addition to when the sunlight in the above, it can generate electricity, further having all the characteristics of the PN junction. In standard light conditions, its rated output voltage is 0.48V. The solar cell module use of solar lighting is connected by the multi-plate solar cell constituted. It has a negative temperature coefficient, and the temperature rises for each degree, the voltage drops 2mV. In use, the open or short circuit of the solar cell is not to be damaged, in fact we also took advantage of this characteristic of the system battery charge and discharge control.
This article is come from: http://www.chinaphoneparts.com/index.php/introduction-of-solar-panels.htm
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