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.

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.

How to Use Solar Panels To Make Electricity

Posted on 20th July 2010 in solar power

All those who really have some cognizance about environment are anxious about the problem of global warming. It is essential for all to go green. There is need to use the various options available for using renewable energy. The sun is a mammoth reservoir of natural power for maintaining the clean environment. The sun provides you about 1000 watts of solar panel energy on a square meter of our planet’s surface. In case you collect and employ this solar power, you will be able to get all your requirement of energy for lighting and heating your office as well as home completely for free. Solar panels play a crucial role in helping to use the energy from the sun.

The solar panels utilise the photovoltaic cells like those used in calculators. The photovoltaic cell converts the light energy into the electricity. A solar panel has a module of these cells connected and packed into a frame called solar panel. The energy in stored into a battery when there is sunlight and used for lighting when it is dark. Even when the days are cloudy, there is enough energy stored to power your home through the day.

The solar power has been used for long in space shuttles and satellites. Solar panels are used for energy lights, road signs, buoys, call boxes, parking lot lighting and lighting of remote areas. The technology is developing fast and solar energy is being used in more and more fields like sunglasses to running solar powered vehicles.

In addition to use for lighting, the solar power is extensively used for heating purpose with specially designed solar panels. The solar renewable energy can be only used by constructing the solar panels to harness it. In the absence of solar panels the idea of using solar power will be only a dream.

The solar panels function in two different ways. In one type of the solar panels, the solar cell transforms the light to electrical energy. These panels are expensive and are less commonly used. Most of the solar panels are utilized for heating purpose. The solar panel absorbs the heat and uses it to heat up the liquid, which has a low boiling point. The liquid is used to heat the water or to generate the steam. The solar panel used for heating is simple in construction, inexpensive and more effective. Solar panels are also used for heating in solar cookers.

The designs, shapes and sizes of the solar panels have no limitations. It all depends on where they are to be used. The heating type solar panels have a number of reflectors, which absorb the heat from sun and send to a particular liquid, which heats the water in turn or makes the steam in the steam generator. Using solar panels is comparatively costlier than using wind energy. In many countries the government is taking keen interest to promote the use of solar power.

They provide incentives for using solar power. The technology for using solar power is progressing at a great pace. Researches have established so far that the aluminium is the best material for making most efficient and strong panels for heating. The aluminium solar panels designed in parabolic shape are most energy efficient.

Although at present it is cheaper to use fossil fuels, but soon the advancements in technology will make solar panels most economical to use the cheapest source of energy.