Solar PV Panels A Vital Element Of An Overall Photovoltaic System

Posted on 23rd May 2011 in environment

Solar electrical systems are increasingly being installed all around the world by private households to decrease their electricity costs. This process also reduces their carbon emissions and contributes toward a greener environment. Solar PV panels are a critical part of these photovoltaic or PV systems.

Solar Panels

Solar Panels

Radiant energy from the sun is free and in limitless supply. As fossil fuel prices (for coal, oil, gas, and so on) have increased through time, the financial rationale justifying a switch to cheaper energy alternatives like solar power have become increasingly compelling. Some governments around the globe, particularly in Europe, have already introduced tax rebates, subsidies and other incentives to encourage customers to install photovoltaic or solar power systems.

A solar panel acts as a collection surface to harness the energy carried by ultraviolet sunlight. The panel is comprised of many solar cells interconnected or wired together. The cells are the central core of the panel, its heart. In addition to capturing the radiant energy, each cell also serves as a diode, permitting electric current to pass in one direction only, blocking current from flowing in the opposite direction.

A cell is the critical piece of equipment that transforms ultraviolet radiation (sunlight) into electricity. By comparison, the panel is simply a base onto which the cells are fixed and wired together into one interconnected system.

A domestic PV system usually has a generation capacity of up to about 10.0 kw of electricity. An average, four-person modern house needs about 7.0 kw of electricity. To be clear, a 7.0 kw system flows 7,000 watts of electricity, sufficient to power 70×100 watt light globes. These domestic PV systems are not cheap; they cost many thousands of dollars.

A 7,000 watts PV system is a large configuration, likely requiring over 40 big solar panels. Most domestic systems would probably be smaller installations with smaller capacity. A 7,000 watts solar power system would allow a household to achieve significant power savings (perhaps upwards of 30 percent). The system would also lower carbon emissions by at least 10,000 tonnes per annum.

Panels vary in size largely based on the size of the cells which are mounted in them. Panel size is also limited mainly by practical logistical requirements related to handling and installation. Panels are normally fixed onto ground-based racks or building roofs. To maximize exposure to sunlight, they point south when north of the equator and vice versa. To maximize the conversion efficiency of cells, panels are inclined to the sun (usually at about 30 degrees). Scientists have confirmed that to optimize conversion efficiency the inclination angle should vary through the day, as well as day-by-day through the year, as the position of the earth relative to the sun changes.

Professional installers are available to install solar PV panels. These highly trained tradesmen are usually registered or certified by a central industry association or body. Installers can assist customers configure the entire PV system that will best meet their needs.

Installing a solar pv on your home or business to lower the cost of electricity remitted to the utility company is fast and easy. You can take advantage of the free and clean energy provided by photovoltaics in an array panel.

PV Panels, Energy For The Future

Posted on 16th February 2011 in environment

PV solar cells are improving since their creation. Not only has their efficiency improved, but they are much less costly as well. It will take more than just one Photovoltaic cell to generate enough power for most things. For that reason, the cells are put together in groups that make up modules which are called solar panels. The following will discuss PV panels their past and the future of energy.

Photovoltaic is Greek meaning light, and electric. This word has been part of English since 1849. In 1839, the photovoltaic effect was actually discovered, but the first cell was not created by Charles Fritts until 1883. Fuller, Pearson, and Chapin were the first to create the first efficient cell in 1954.

One solar panel may be able to provide a small amount of power, but in order to provide a large amount of power, then panels are arranged in what is known as an array. An array is a multiple of modules that are able to make a large quantity of electricity; enough to light a house, or power plant. Until just recently, solar panels have been much too costly for the general consumer.

The cells have to be protected from the elements, and so they are usually encased between glass. Solar cells are usually connected in what is called a series inside the module. A series refers to the order in which they are connected. When circuitry is connected in a series, the same current is allowed to flow through all of it.

When cells are connected parallel, then higher currents are yielded. Modules can be connected in arrays by parallel, or by series until the DC voltage, and current necessary are reached. The power that is generated from the solar array is measured by watts or kilowatts.

To be able to use the energy that is generated, the electricity is processed through an electricity grid through an inverter. If the inverter is connected to a system that stands alone, then batteries can be used to store any energy that is not used immediately. There are many solar gadgets available that work on this same principle.

Financial incentives are there for individuals and business owners to switch to solar energy as a form of renewable energy. This is a great time to make the conversion. New manufacturing materials and government incentives make it less expensive, and you can make a big difference to change the world at the same time. Do your part to save natural resources that are being depleted more and more every day. We are wasting renewable energy that is so plentiful we will never be able to use it all.

When you decide to get some pv panels for your alternative electricity, you should get the best person to install them.

Things You May Not Know About Solar Energy

Posted on 22nd September 2010 in solar power

This article is going to help the reader understand that there is a dirty little secret about solar energy that not many people know about. There are two obvious benefits from this technology; it helps people cut traditional power costs, and it is also much more green. The dirty little secret lies within the fact that some people might not require professional assistance to obtain and install it.

There are many types of home owners, especially ones that know a lot about installing electricity into a home, that could install such an upgrade by their-selves. A lot of people think that such an upgrade would have to be made by a professional firm. While this is recommended for obvious reasons, some homeowners might choose to tackle the chore for their-selves.

Consumers that are brave enough to try and install such technology into their own home are naturally going to have to buy the necessary gear. One necessary component is referred to as a DIY panel device and these panels are typically sold in kits that were designed around various sized homes. Other necessary components would be the converter box as well as the accessories for wiring such devices into a home. The DC power created through the panels has to be converted to AC current.

There are many consumers overlooking the fact that while such an upgrade could be quite costly for a home, it might be rather cost effective for smaller power consuming devices such as boats and RVs. The upgrade could easily pay for itself if people use their boat or RV very often. Consider that these type of devices do not require the type of large panel kits that a home might.

Consumers that are searching for the necessary equipment to make such an upgrade are probably going to be better off searching the web. There are many popular auction based websites that will be selling the type of equipment needed for such upgrades. These sites will sell not only the panel kits but also the wiring equipment and converter boxes.

It doesn’t matter if a person wants to install such an upgrade into their home or even just their RV or boat, they should do enough research to thoroughly understand what it is that they will be doing before they even attempt to do it. Some of the more clever people might actually phone a professional service and pick the representative’s brain for useful tid bits of information.

It is important that consumers remember that not every area is going to benefit through the use of such technology. It should be very obvious to most people that areas without a lot of sun exposure are not going to be great areas to utilize such options. This type of system is always going to be combined with a traditional source of electricity for instances in which the alternate source runs dry.

By now, readers should realize something about solar energy that many average people do not even consider; it can be installed by a private individual. This type of task is not for a lot of people however, and many people are going to want to hire a professional service to not only install but also buy their equipment. This is especially true for home owners.

Live Green byChoosing Solar Electricity

Posted on 15th August 2010 in solar power

Solar power is a tremendous energy resource that has only recently been tapped by man for his practical usage. The underlying technology for this process is called solar photovoltaics. As photovoltaic technology becomes more sophisticated, we are able to harness the power of solar energy more efficiently than ever before.

The increase in the use of solar energy reduces the use of fossil fuels directly impacting positively on the environment. Solar electricity can be used in almost any home. The solar panels can be set up on the roof of the house where they will collect the solar energy.

With the solar panels providing your house with a large portion of the electricity it needs, you will be using less fossil fuel which is great for the environment. It is also relatively easy to set up the solar panels in your home. Most of the solar panel kits are extremely user-friendly, providing an easy to follow instruction manual.

If you want, you can always employ the services of firms that offer solar panel home installations at very affordable prices. The factors you need to consider when buying your solar kit include the amount of energy you consume monthly and the kind of appliances you use in your home.

You need to install the solar panels where they get the most exposure to the sun without being an eye-sore, which makes the roof of your house the ideal spot. It is the function of the solar panels to collect the solar energy and to send it to a converter.

From there, the energy is stored in batteries which are located at various points in your home. It is important to do an inspection of your roof to find the best possible spot for the solar panels.

You need to avoid placing the solar panels where they can be shaded by other buildings or tree branches as this will greatly reduce their effectiveness. Protecting the environment is among one of the many reasons for the harnessing of solar power energy into a viable power resource for man.

It would be wonderful if every home used solar electricity as this will reduce the use of fossil fuels. Environmental problems such as the greenhouse effect and air pollution will decrease with the reduction of fossil fuel usage.

Unfortunately, solar power is still confined to the alternative energy resources category, together with other power sources like geothermal, nuclear and hydroelectric power. However, the future is very bright for solar power technology and we will get to a point where the sun will be our prime source of energy.

The full potential of photovoltaics has not yet been reached. This technology has the power to provide us with an unlimited amount of energy which will help with the power crises that we are now experiencing. The key to a greener planet and more power reserves is photovoltaic technology.

PV Solar for Renewable Energy

Posted on 21st May 2010 in environment

In order to convert solar radiation to direct current electricity, it requires the use of PVs, or photovoltaic material. Many different types of material are combined to create the photovoltaic cell. Due to the most recent demand for renewable energy, the manufacture of these cells has dramatically increased. There production has been steadily increasing since 2002 each year. Read on and find out how PV solar is one way to conserve natural resources in the future.

solar pv

solar pv

Photovoltaics create solar power by using solar cells to convert the energy from the sun into electricity that we can use. They do this by the process of photovoltaic effect. This effect explains that photons of light roughly moving electrons into an higher state of energy that will then create the electricity. An inverter is necessary to convert the direct current (DC) electricity to alternating (AC) current.

Many materials are used to create photovoltaics. Some of the materials include different types of silicons, copper indium selenide, and cadmium telluride. Polycrystalline silicon is a key material of a solar panel. The supply of solar panels that can be created is limited to the supply of polycrystalline silicon, and in 2006, half of the supply in world was in use for solar panels. There were twelve known factories that were producing the material in 2008.

The production of PVs has increased by at least twenty percent per year beginning in 2002. That labels it as the fastest growing energy technology in the world. By the end of 2009, worldwide, installed PVs totaled more that 21,000 megawatts (megawatt=1 million watts).

Installing solar panels is being supported by many different countries. The governments of different countries are actually offering citizens and businesses alike different incentive packages to install them. New technology, and less expensive ways to manufacture have made the prices come down to a more affordable rate for everyone.

In 2008, it was said that solar power could provide one thousand times what the world would need and it only provide two tenths of a percent that year. By these statistics, it is apparent that renewable energy resources have not been used to the fullest; not even close. The prediction is that it will continue to double every two to three years. It could become the main power source for the world.

Some would say that solar power is not predictable, however, they are able to predict with exceptional accuracy when it will and will not be available. Other sources of renewable energy can also be used in conjunction with the photovoltaics. This has been proven successful in large power plants.