Benefits of Solar Photovoltaic Systems

The government has started to offer incentives for the use of photovoltaic systems in the UK and it's about time!

We shall look into the various benefits and good points of installing solar photovoltaic systems. The benefits are more than just the obvious, and once looked into properly, are very extensive.

Financial

We know that installing photovoltaic systems will save you money on your electricity bills. However, did you know that you will also get paid by the government for installing solar panels? The Feed-in Tariff scheme means that if you get your energy from a renewable energy source, your energy supplier will pay you for every KW you produce. They'll also pay you for every KW of energy you put back into the national grid. Also, electricity prices are going up at astronomical rates every year and this is not set to change any time soon, especially in the messy financial times we're in at the moment. Energy price increases are inevitable at the moment so why not grab some much needed independence and produce your own energy? It'll save you bucket loads in electric and gas bills. Also, having them installed is also shown to increase the value of your home. No proper studies have been carried out yet in the UK, but this has been proven to be the case in the US. What are you waiting for?

Environmental

Did you know that installing a home solar panel can reduce your annual carbon emissions by over 900kg of Co2? That's just when you install a 1.8kWp system. A bigger solar photovoltaic system will reduce your emissions even more. When they generate electricity, no emissions that are bad for the environment are released. Also, they are made predominantly of silicone which is a natural resource found in sand.

Reliability

Solar photovoltaic systems have no moving parts so do not need regular maintenance. They will generate electricity for twenty years or more. All you need to do is clean them occasionally and make sure that there is nothing in the way that would block sunlight getting onto them.

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Photovoltaic Solar Systems

At present, there is a new type of Solar array or photoelectric solar cells known as Photovoltaics or simply PV. This solar cell is made up of Silicons in crystalline form with little cadmium telluride and little copper indium sulfide or copper indium selenide. These solar arrays work on the principle of Einstein's photoelectric effect which won him the Nobel Prize. When Sun light falls on these PV solar systems, the device convents the heat energy into electrical energy and thus produces electricity. Semiconductors are used for manufacturing of the photovoltaic systems. This is because Semiconductors have most number of valance electrons. The process by which these semiconductors are made is known as Czochralski process. These semiconductors are produced using silicon. The amount of electrical energy produced is directly proportional to the number of solar cells used.

The human race should fall back to using the renewable source of power because all the fuels through which we are generating power are all going to run out in another hundred years from now on. So for power generation renewable energy sources are the only one which can provide us a long term solution. The PV solar systems are one of the renewable energy sources which uses sun as its energy source. The main advantage of this PV solar system is that you can build it yourself. It will be a funny experience as well as exciting experience building the PV solar system ourselves. This kit costs around less that Dollar two hundred; you can also get the manuals from eBay website. You can cut down the cost if you can buy few things yourself from the local hardware stores.

Based on your need you can decide the number of solar cells to be used in the PV solar systems. For building a small mobile phone charger one solar cell will be good enough. You can also add a battery to the design which will store the electrical energy for later use. This PV solar system with the battery gives you more stability because it provides you provision to store the power and provides you a constant output voltage. However, a design without batteries will have fluctuations in its output voltage.

More the solar cells more the generation capacity of your PV solar system. To maximize the power generation you need to maintain the angle at which the sun rays falls on the solar panel at ninety degrees. This can be archived by having a motor attached to the panels which can tilt the move it according to the position of the sun and maintain a ninety degrees angle between the panel and the sun rays. This will in turn increase the efficiency of the power generation in the PV solar systems. There are motors available in the market which can turn up to 320 degrees. You can also use reflectors in a large number to focus on one particular solar cell which will also help you increase the power production coefficient.

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Solar Photovoltaic Systems

Photovoltaic systems are a new energy source whose time has come.

• This exciting solution converts energy from the sun, both light and unseen radiation, into electricity. Photovoltaic power is gaining popularity worldwide for a number of reasons:
• Using photovoltaic technology to generate electricity is a totally 'green' process. There is no hazardous waste. No coal or gas or oil is burned, no smoke is generated. No tankers full of fuel need to traverse the ocean.
• Photovoltaic energy generation is the world's fastest growing energy industry. New jobs are created daily, helping to strengthen economies and foster energy independence.
• Photovoltaic energy can be stored for future use.
• Photovoltaic systems are reliable, have long lives, and have low maintenance requirements.
• The main source of power, the Sun, is free and accessible to all.

While solar photovoltaic energy as an industry is new, the science has been around a long time. Edward Becquerel, a French physicist, is credited with first noting that some materials produce electricity when exposed to light as early as 1839; Albert Einstein won the Nobel Prize in physics for his work in the field. Through the 1960s and 1970s, photovoltaic energy production advanced further in association with space exploration.

A solar photovoltaic panel is made up of one or more solar cells, or photovoltaic cells. The cells are created using the semiconductor materials, usually a form of silicon. A thin slice of semiconductor material is treated to form an electric field, with a positive and a negative side.
When solar energy contacts the cell, electrons are freed from the atoms in the semiconductor material. When conductors are attached to both the positive and negative sides of the cell, the freed atoms generate an electric current, DC, which can then be used immediately or stored in a battery. A inverter can be used to transform the current to AC power.

Both solar photovoltaic panels and photovoltaic cells are widely available today. Applications include providing power to 'off grid' rural locations, for boats, electric cars, and remote sensing systems.

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Benefits of Photovoltaic Modules

Photovoltaic modules are the devices that have made reliable power beyond the power lines possible. Solar photovoltaic is one of the most widely used alternative energy sources. Even those lucky enough to have a viable hydro or wind site often choose to have a few Photovoltaic modules for back-up or seasonal use. A Photovoltaic module produces electrical current when it is exposed to sunlight. The technology is closely related to and was a spinoff or 1950s transistor technology. Photovoltaics provide clean, uncomplicated power whenever and wherever the sun shines on them, so, not surprisingly; space applications funded most of the early research and development.

Photovoltaic modules last a long, long time. How long we honestly do not yet know, as the oldest terrestrial modules are barely 30 years old. Ask us again in 30 more years and we will have a better answer. All full-size modules carry 10- to 20-year warranties, reflecting their manufacturers’ faith in the durability of these products. Photovoltaic technology is closely related to transistor technology. Based on our experience with transistors, which just fade away after twenty years of constant use, most manufacturers have been confidently predicting 20-year or longer lifespans. However, keep in mind that PV modules are only seeing six to eight hours of active use per day, so we may find that lifespans of 60 to 80 years are normal. Cells that were put into the truly nasty environment of space in the early 1960s are still functioning perfectly.

Modules will catch the maximum sunlight, and therefore have the maximum output, when they are oriented perpendicular (at right angles) to the sun. This means that tracking the sun across the sky from east to west will give you more power output. Tracking mounts are expensive. Due to economies of scale, they‘re usually only worthwhile on larger Photovoltaic systems, generally ones with eight or more modules. All systems are most productive if the modules are perpendicular (within five degrees) to the sun at noon, the most productive time of the day. In the winter, modules should be at the angle of your latitude plus 23 degrees, which is the recessional, angle of the sun. In the summer, your latitude minus the same 23- degree angle is ideal. (On a practical level, many residential systems will have power to burn in the summer, and seasonal adjustment may be unnecessary.) As noted above, modules should have some air space behind them to promote air flow and better cooling.

Generally speaking, photovoltaic arrays that consist of eight or more modules are better off on a tracking mount, and smaller arrays are usually better placed on fixed mounts. This rule of thumb is far from ironclad, however, and there are good reasons to use either kind of mounting.

Benefits

1. No moving parts
2. Ultra-low maintenance
3. Extremely long life
4. Noncorrosive parts
5. Easy installation
6. Modular design
7. Universal application
8. Safe low-voltage output
9. Simple controls

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