Posted by Solar energy guru | Filed under Solar panels & photovoltaic cells
Solar panels can be used to exploit solar energy that, when absorbed, can be an efficient source of energy for electricity and heating. In addition, the power that is produced by solar panels can be used for many other things.
The last time when solar panels were considered to be extremely efficient was in the 1970′s, when the world was surviving the oil trade crisis and there was a lack of fossil fuels. People began to look for substitute energies, and many of them switched to them. However, as gasoline became once more available, the new sources of energy were forgotten. The price of gasoline is once again rocketing, and consumers are once again beginning to look for alternate energy sources. In addition, the risk of global warming has influenced many people to change their lifestyles in order to be ecologically responsible.
Photovoltaic power is a usable form of the sun’s energy. A module absorbs the sun’s rays and converts them into electricity that we can use. Approximately 17% of sunlight can be transformed into usable electricity through conventional silicon panels. That may not seem to be a great deal; and this is why silicon panels were upgraded in 2008 to new and updated models. A solar panel that utilizes new cells transforms 22% of sunlight it absorbs into electricity. Hypothetically, the maximum that the solar panel cells can convert is considered to be approximately 27% of absorbed sunlight.
Every photovoltaic cell in a PV panel is a semiconductor. When the sun hits a cell, then part of the ray is absorbed by the silicon cell. The cell absorbs the rays’ energy and then transfers the cell to the electrons in the silicon. This causes electrons to flow, and a current is created. The current is extracted and sent to the battery or grid by metal contacts built on the top and bottom of the PV cells. At this point, electricity can be used. The electricity is sent the means necessary to the grid if a grid connection is utilized. If a battery is utilized, then power is kept in the battery until needed.
More and more people successfully employ PV solar panels. Some say that clouds can affect the work of PV solar panels; however, they are nevertheless very efficiently used in cloudy Germany.
Solar panels are designed to absorb the sun’s rays as a source of energy to generate electricity or heat. Sunrays excite atoms within the silicon layer of a solar panel, as well as the two other layers, known as protective layers.
Those atoms create electric current that is used by different devices. The history of panels actually dates back to 1839, and this invention has been developed and improved since that time. Solar panels were utilized to heat water for in-house purposes. Very often, specifically shaped mirrors were used for the centralization of light onto a tube of oil. Within that process, oil became heated. Heated oil travels through water, causing water to boil. The steam produced from boiling water turns a turbine, resulting in the creation of electricity.
Back in the 1970′s, solar panels were extremely popular. There were a great number of houses at that time that had tri-pods installed on their roofs for gathering the power. These systems became very popular first in environmentally sensitive Arizona, but the boom then spread throughout the world. However, in those times the solar cell was somewhat ineffective and rather expensive to install and maintain. That is why many tri-pod users switched back to the old energy sources when the crisis was over. Nevertheless, many scientists and businessmen have come to understand that the idea of solar energy is very worthwhile, and have therefore continued to upgrade and improve the system in order to make it more effective.
At the present time, solar panels are very effective. They are able to produce far more energy than did the early type of solar panel. Solar panels have been much improved with the production of electric current at the junction of two substances exposed to light. Modern solar cells can easily turn sunlight directly into ready-to-use power. Moreover, solar systems have become so much more productive, cheaper and ecologically friendly that more and more people have made up their minds to invest in them. Nowadays, solar panels can be made very thin, can be installed virtually anywhere. Solar power technology has not stopped running; it continues to develop very quickly.
This article is intended to enumerate some different types of solar panels that can generate enough energy for homes and businesses. These solar systems are usually installed on the roof of a building or close to it. In addition, Photovoltaic panels will be discussed.
Solar panels have become more and more popular in recent times. They have a number of benefits ranging from the financial to the ecological. First of all, solar panels are extremely environmentally friendly. They help people to cut energy costs, decrease carbon emissions and become more self-sufficient. Solar panels are very popular in those areas where various governmental entities have introduced a number of incentives such as lower taxes and discounts. For instance, in the state of Colorado, huge rebates are offered on the up-front cost of purchasing and implementing a home solar system.
Once solar panels are installed, you can begin using it to produce electricity and heat for the house. If the energy is being generated in excess of your needs, it can be diverted for use on the grid, where it is bought by the electrical power company. Some people can actually earn money from their solar panels. With rebates taken into account on the initial cost, it will generally take from 17 to 24 years to recoup the initial expense of such a system, after which you will effectively be generating power from the sun entirely free of charge.
However, you should be aware that solar panels also contribute to greenhouse emissions. It takes power to produce a solar system, and this energy is very often fossil-based and front-end loaded. That is why there is always a period in the life of a solar panel where it contributes to carbon emissions. Until such time as the solar system has generated energy equal in amount to the energy used to produce it (its fossil-emission payback period), it is actually a contributor to greenhouse gas emissions. This fossil-emission payback period is usually recognized to be five to ten years.
There are two configurations in which low power solar panels are available: 12V or 14V. High power panels are available in 24V. Most solar panels run on direct current, so you will need a power inverter that can change from low-voltage DC to another voltage AC to suit the voltage and type that is needed for both the home and the grid.
Usually, solar panels are made from twin sheets of semi-conducting silicon with phosphorus and boron atoms. Amorphous silicon solar cells are a very powerful, emerging variety of photovoltaic panels that differ in output, structure, and manufacture from traditional photovoltaic panels that utilize crystalline silicon. These H-AS solar panels manufacture energy in exactly the same way, but they are produced just one micrometer in depth by laying down polymorphous silicon at very high pressures and temperatures.
Another benefit of solar systems is that they are maintained by the manufacturer for no cost. In addition, in most cases you get a 20 years guarantee.
You need to install your solar panels on the side of your house that receives the maximum amount of sunlight. If you live south of the equator, then it should be the north-facing aspect; if north of the equator, then the south-facing.