The Sun's Energy Will Become More Accessible By The Day.
Solar energy is generated one hundred and fifty million kilometres away from earth by the Sun. This largest of all objects in our universe is composed of the gasses hydrogen and helium.
Nuclear fusion occurs as hydrogen is converted to helium. Greater amounts of hydrogen convert to lesser amounts of helium, resulting in gamma rays that travel from the core to its surface, giving out light and radiant heat.
It is estimated that about 386 billion megawatts of power are produced continuously. The amounts that find their way through the 150 million kilometres of space to eventually strike Earth appear to be just the right amount to sustain life on our planet.
Plants on earth have been catching sunlight in their leaves for millions of years. As they have died the power has been stored close to the Earth’s surface in beds of coal or lakes of oil. We are fortunate indeed to have daily supplies of sunlight in addition to resources that have been generated and stored over millions of years.
Most of the power that lights and drives our world is derived by burning coal or oil in order to generate electricity. The resources have been stored for centuries beneath the earth and are recovered laboriously. Now it is becoming obvious that they are being rapidly depleted.
Then came the rush to find alternative ways to catch sunlight directly, without it having to go through the age-long process of forming into oil and coal before being refined into usable power. This process is now regarded as causing pollution and depleting natural resources.
Methods of catching electricity through the movement of air or water have been used for many centuries. They are not the entire solution because they cannot generate enough for the needs of a human population which has been exploding for two hundred years. Nuclear power is another alternative, but considered dangerous.
In this scenario photovoltaic cells make their entry. Made of silicon, each cell absorbs sunlight and transfers it to an electric field. They catch the sun’s power before it even reaches the Earth’s surface. In this way electricity becomes cheap and clean.
Each photovoltaic cell catches such a small amount of sunlight that the cells have to be harnessed together in panels. A large number of these placed on a roof may only produce sufficient power to satisfy part of a householder’s needs.
Although solar panels produce clean and cheap electricity they can only operate when the sun is shining. The electricity generated must be stored in batteries so that it can be used at night, or when the sunlight is blocked by cloud. This increases the costs of installation, but electricity remains free once installation is done.
The Sun’s light was used in space travel half a century ago. It is used now in many ways in small appliances such as watches, calculators and lights. As technology improves it will surely be used to drive cars, and that will benefit the Planet in many ways. For the present solar energy make plants grow and is being employed in small ways to generate electricity
Solar energy is very useful when it comes to doing your part in saving our world. We would like to tell you all more about solar electricity right today.
Everything You Should Know About Solar PV Panels
Light can be absorbed by certain materials to release electrons, creating a voltage. This is known as the photovoltaic effect, and it was first discovered in 1839. Therefore the method of converting energy from sunlight and turning it into electricity is known as Photovoltaics. Photons of light excite the generated electrons and they jump to a conduction band within the solar cells. Direct current electricity is produced. Photovoltaics (PV) is the method by which scientists harness the sun’s radiation and solar PV panels utilize photovoltaic material to create a renewable and abundant energy source.
While French physicist, Edmund Bequerel, discovered the photoelectric effect, it was Albert Einstein who deciphered the laws of light and the effect in 1905 to create a foundation on which photovoltaics are based. The first PV module was created in 1954, at Bell Laboratories.
As demand for renewable energy grows, technology advances. There has been a steady rise in the efficiency of cells and photovoltaic arrays, which are made of many cells. Photovoltaics is the quickest growing power-generation technology on earth. From 2004 to 2009, PV maximum capacity rose annually by 60%. Technological advances partnered with growing manufacturing scale and efficiency ensure that PVs will improve in the year to come.
The science photovoltaics was first adopted to power satellites and spacecrafts. Photovoltaic modules are now usually connected to city grids.
Off-grid PVs are another growing market. They provide consumers and businesses the means to power their homes, vehicle, boats, and other devices. They can be built either on the ground, such as farmlands or grazing lands, or can be positioned on roofs or in walls. They are then referred to as BIPVs. Only one solar panel is necessary to power something like a telephone, but arrays would be required to supply a home with energy.
Photovoltaic power is calculated by testing to see the maximum energy input possible. In reality, the power generated is often less than the value stated. Factors such as weather conditions, location, and time contribute to the amount of energy harnessed. Actual performance is usually around 25% of stated output.
This largely untapped source of renewable energy sees a 20 percent increase every year, making it the quickest booming. While Germany is making an effort to switch to renewable power, having installed 3,800 MW of PV panels in 2009, the US is lagging behind other developed countries: it only installed 500 MW worth.
Spain is currently the greatest user of PVs, but a new tariff is expected to cause their encouraging numbers to drop. Countries that are encouraging solar power include Japan, Italy, Germany, and France. If there was international commitment to the furthering of solar technology, it would constitute 14% of world demand by 2030, according to Greenpeace.
The technology behind solar PV panels is bound to improve as advances in design and materials are made. If demand continues to grow, they will become more efficient and cheap enough for any consumer to purchase.
Get the ultimate low down on how solar PV panels work now in our super review of everything you need to know about photovoltaics .
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Solar Panel Installers Highly Trained, Accredited & Skilled Tradesmen
Solar panel installers are professionals focused on installing solar power, or photovoltaic (PV), systems for industrial, commercial or domestic customers. Solar panels are one element in these total systems. In addition to installation, some installers provide advisory services assisting customers decide on a system design that best matches their needs. Selecting an installer is an important decision.
Installers are skilled tradesmen, typically qualified as electricians. They are usually accredited by an industry association. It is useful for customers to determine whether the industry association or body has implemented an installer accreditation scheme. If so, a list of accredited suppliers or installers is typically distributed as part of the accreditation scheme.
PV systems for domestic households are usually designed with a capacity ranging from 600 watts (at a cost of few thousand dollars) up to 3,500 watts (at a cost of several tens of thousands of dollars). Indicatively, a 1,000 watt system with about six large collector panels can supply a large proportion, though not one hundred percent, of the electricity requirements of a typical four person household.
A 1,000 watt system PV system can be expected to lower the household electricity bill of a four person household by about 4 percent or more. On average, that system will also decrease carbon emissions by 1,500 tonnes each year. These estimates are indicative only since actual results depend on a myriad of factors.
Solar panels are built as either rigid or flexible modules. Rigid units use glass as a transparent panel that allows sunlight to fall on the cells. Flexible units are sandwiched between plastic sheets. Importantly, the cells in a panel are connected in series, not in parallel. If one single cell becomes non-operational due to, say, shade or malfunction, the entire panel of cells stops working. This outcome is similar to many types of Christmas tree lights that are also connected in series. In short, if one cell is out, they are all out.
Most commercially available solar cells are produced using two special types of purified silicon, a positive (P) and a negative (N) type. The core of the cell is the surface at which these two forms of silicon come together, the P-N junction. The top of the cell is transparent so that sunlight can fall on the junction. The positive electrode of the cell is made of metal ribs connected by wires. The negative electrode is a metal base or substrate placed in contact with the N-type silicon.
When sunlight (radiant energy) strikes the P-N junction, a potential difference (voltage) develops between the P-type and N-type materials. If a load is connected to the cell, an electrical current is produced. The intensity of that current through the load increases in direct proportion to the brightness of the sunlight, up to a critical maximum level. As light intensity increases beyond that critical level, the flow of current flattens out at the so-called saturation current level. The ratio of the generated electrical power to the sunlight striking the PV cell is known as the conversion efficiency of the PV cell.
For these reasons, a PV system incorporates one of three different back-up alternatives with an automatic cut-in trigger. First, it is also grid connected meaning it is plugged-in to the main public electricity grid system. Second, it has a backup generator usually powered by some form of fossil fuel. Third, the PV system has storage batteries. Battery-backed PV systems can be installed to allow 12 or 24 DC volt appliances (such as small refrigerators, radios, lights and so on) to be supplied electricity directly from the battery bank. Solar panel installers can advise customers on these technical issues.
Solar panel installers are highly trained professionals. Get the exclusive inside scoop on the best installers now in our review of everything you need to know about solar panels and solar electricity .
Cutting Down Costs Through Use Of Solar Energy And How To Effectively Use It
There are many individuals across the world that have realized the need to start using solar energy due to the many benefits it offers. This is becoming a favorable option for many homeowners who have felt the need to save on power bills along with being sensitive to the environment they live in. There are many factors that contribute to this shift but basically its because it is not only a cheaper option but it is easy to set up as well. This is the only way homeowners will be able to save but still enjoy considerable amount of natural power supply.
Given that this is power generated by the sun, most people make good use of it by directing it in the houses for lighting purposes. Since it is natural power supply, they do not get to pay any fee to use it so long as they have purchased the necessary power panels. The panels are placed on the roof of the house and then stored for future use. This is one big strategy people can use to avoid paying for electricity power bills.
These panels can produce up to 24v of power if strategically located. It is important that users set the panels on roof parts that are not surrounded with many tress sop that it can collect as much power as possible. There are numerous merits attached to using this kind of power as compared to the demerits. Those who have used this option before can attribute to the fact that there are more advantages that can be reaped from it.
Compared to other sources of power supply where one is sure to get huge volumes of electricity bill at the end of the month, this alternative is absolutely charge free. This is the biggest asset of using this power alternative. Individuals must therefore install panels in strategic places so that they can harvest as mush power as possible and save it for future use. They can be sure that once they have stored this power, they can go fro many months without having to worry about paying anything to the power firms.
This is one of the best ways to free people from paying unnecessary taxes. With this power, people can avail up to thirty percent power tax credits that will cut the tax they are paying. The unused credits can then be used for future tax settlements. It makes one independent from electricity power firms so that one does not have to be entitled to high bills.
This option scores high above the rest when it comes to protecting the environment. Remember that this is natural power harvested directly from the sun meaning that there are no chemical released involved. In addition, it is very clean as it has no pollutants along with being a safe power supply option.
It can sometimes be hard to set up electric cables in rural areas making it hard for power companies to supply electricity in the areas. This is where this option comes handy and plays a critical role in people’s homes. This is because it is generally easier to use power panels in the areas as compared other options.
Finally using solar energy is far much better option for any home owner due to the many benefits it carries. People should at least give it a try and they will soon discover they have been missing out on something.
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Advantages Of Solar Energy And How To Apply It Efficiently
The sun produces so much power that there are so many people that have found a way to use that power in their homes. This is the chance that the people use to reduce the amount of money that they would have used to pay for the huge electricity bills. Solar energy can be tapped from the panels, which are installed in a way that they will be able to trap the rays of the sun.
It is highly likely that this source of power is what will be used in the future and it is already being used. The power can be used for either residential or industrial use or any other use that the person may have require it for. There are so many people that use the power at home because they have discovered that it helps to save a lot of money, and at the same time help the environment to stay clean.
Power from the sun is the way to go, as it is an alternative source of power that will be in use in the future. For whatever reason that the person will need the power for, be it domestic or commercial the best thing is to take full advantage of it. So many people from all over the globe have been introduced to the source as a way that they can cut their bills and also help to protect the environment from pollution.
A home that will generate more power than they are able to consume can sell all the extra power generated to an electricity company. This money can be used to recover the money that was used in the installation costs that the owner incurred.
So many places in the world continue to rely on sources like oil and coal. These are non renewable sources and research has shown that they will soon be depleted and the world will have to look for other alternatives.
People are not the only ones who will benefit from using the sun as a source of power, as the environment will also be conserved. Power from the sun is clean and renewable and it is available in all locations in the world. When compared to other sources of power like oil or even coal it is clear that the sun is one hundred percent eco friendly. Investing in the power source will not only reduce the pollution but also safeguard the future for our children and their children.
The other advantage of using this source of power is that research has shown that it will be challenging to continue to depend on other forms of power like oil and coal, because they are getting depleted at a fast rate. Therefore, alternative sources of power like the sun are the best sources to use since they are renewable.
Investing in solar energy is worth it and has advantages associated with it. This includes the fact that the earth will be saved from so much pollution and people will be able to save on the cost of electricity.
Conserving expenses for utility costs due to using solar energy is helpful to homeowners and businesses. Utilization of solar electricity reduces the dependence on carbon based fuels.
