Solar panels are basically a panel that uses the sun's energy to produce electricity. Solar panels harvest sunlight and convert it to electricity that can power lights and appliances just the ones that you use in your house. Solar Cells, or photovoltaic cells, are arranged in a grid-like pattern on the surface of the solar panel. These solar voltaic cells collect sunlight during the daylight hours and covert it into electricity. Solar panels in the past have been mostly with silicon, which is used in computers as well. More recently solar panels have used other materials and metals because the cost of silicon is starting to rise as competetion for this precious material is becoming fierce while supply is not increasing.

And still other solar panels are made with a different kind of silicon alloy in a rolling process. The solar cells created in this way can be more strong, produce more watts of electricity, and they are thinner which makes them weigh less. This can be very important for applications like solar cars. Finally, NASA and other goverment sponsored space programs use a very expensive solar panel made from gallium arsenide via a sophisticated and expensive procedure. Solar cells made this way produce alot of electricity for their size and weight, but they are much too expensive for anyone other than the government to buy.

Lately, a whole new type of solar panel is being made from plastic which are promising because they are much cheaper to produce. I'll be writing more on this as more is made available to the public about them. However, for now allow me to dream about the different ways this could be used. Suppose you want to power your laptop in a remote location, or use a GPS device while backpacking in the wilderness for an extended period of time. These plastic solar panels could power just about any appliance that you use in your home out in a remote location.

The amount of power solar panels produce is determined by the quality of the solar panel and the materials and technology used in making the solar panel. When buying solar panels, most people expect to pay about 4 or 5 dollars a watt. The price will slowly, but surely come down in price over time. More and more companies are starting to research and develop solar panels with exciting new discoveries and developments that are starting to shine light on the solar panel industry. If you pay attention to the stock market you will notice that there are many publically traded solar panel based companies now that you can invest in. To name a few there is Daystar DSTI, XSunX XSNX, WorldWater WWAT.

Currently, solar panels are very popular in remote locations and recreation vehicles, but this is changing. Solar Panels are now becoming popular in urban areas where clean energy advocates and law makers are creating incentives for this clean, safe, and quiet alnernative energy source. I can imagine a day where housetops will all be covered with mini powerplants in the form of solar panels. This will be a great and beautiful thing for a number of reasons. This will put power in the hands of the individual property owner. No longer will you be at the mercy of the power company to raise rates on you. Even if you don't choose to put solar panels on your house to zero your electricity bill, you will also benefit. Power companies will have to lower their rates due to the increased competetion from the home based mini solar panel powerplant. This will be good for national security and protect us from terrorists. If solar panels don't take off and replace nuclear power, our planet will become an easy target for terrorist who will then have thousands of nuclear power plants to target for their next attack. Also, we will be stuck with an untold amount of radioactive waste to dispose of. And, nobody wants this stuff stored in their backyard or even anywhere in their state. It reduces property value and creates anxiety over possible messy leaks and exposure.

There is much more to be written about this subject, so please visit my website for more information about solar panels: http://www.solarpanel.be

Noah Stephens is an expert on photovoltaic solar panels. Visit his website http://www.solarpanel.be

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As the world looks for alternative fuel sources, tidal energy is starting to attract attention again. Following is an overview of tidal energy.

Overview of Tidal Energy

If you have ever lived near the ocean, you know about tides. Like clockwork, the tide rolls in and out moving massive amounts of water from here to there and back again. This massive movement of water also happens to contain a huge amount of energy. If the power of the tides could be converted to usable energy, many think tidal energy would be the answer to many of the energy problems in the world.

There are two basic theories on how to convert tides into power. The first involves converting the power of the horizontal movement of the water into electricity. The second involves producing energy from the rise and drop of water levels. With our vast knowledge of hydroelectricity production with dams, converting moving water is currently the favored technology.

With hydropower, energy is produced by passing moving water through turbines which spin and create electricity. While this may seem an obvious way to go after tidal power, there are some inherent problems. First, tidal water moves much slower. Second, the energy in tides are spread across great areas, to wit, the energy in the amount of water that would pass through even a large pipe is relatively small. This technological quagmire has never been solved, but a new approach is gaining adherents.

One new approach incorporates the dam principals in hydroelectric production. The idea is to let water come in when the tide is rising and then prevent it from leaving when the tide goes out. Doors are used to cut off the water. The water is then diverted into pipes with turbines and you essentially have hydroelectric power.

There are a few problems with this approach. First, the tidal area is devastated because the natural cycle is interrupted. Second, the volume of moving water is reduced because the dam can’t be built with a large enough opening to allow all water to enter. Third, the inherent corrosive nature of salt water leads too much higher maintenance costs or at least is forecast to do so.

The advantage of tidal energy is it is extremely reliable and predictable. Orbital issues involving the moon cause tides. Although the moon is slowly moving away from the Earth, the sun is expected to burn out before it gets very far away. Regardless, this means tides are highly predictable from both size and time aspects. In fact, you can go to any surf store and pick up a tide table.

The tidal energy platform has a lot of potential if technological issues can be overcome. To date, Japan and a few European countries are the only ones researching solutions.

Rick Chapo is with SolarCompanies.com, a directory of solar energy companies. Visit us to read more articles on solar power and facts about tidal energy.

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It is essential that we find affordable and workable sources of alternative energy before the world completely consumes the already limited stock of fossil fuels. Many countries have started to introduce renewable energy schemes and more still have invested money into researching and even producing different sources of alternative energy. While it is essential that we become less reliant or not reliant at all on fossil fuels, many forms of alternative energy have their disadvantages as well as their obvious advantages. It has to be said though, that the advantages far outweigh the disadvantages in many cases.

Wind Energy.

Harnessing the power of the wind and using it to our ends is hardly a new idea. Windmills have been and still are used for many different purposes and have been for a great many years, but the improvement of turbines combined with the improved technology to turn the motion of turbine blades into an energy source has seen the use of turbines explode.

Wind power is very popular, but in order to provide a reasonable amount of power it may prove necessary to have large amounts of turbines. On windy days, and even not so windy days some turbines make a noise that many residents consider to be unbearable. Areas of open countryside are protected by conservation orders, which means they can’t be built there either and if there is no conservation order there are still protestors willing to do almost anything to stop the turbines being built. The only viable option left is to use offshore wind farms and these are being investigated, developed and planned all around the world but it takes too many turbines to create a reasonable amount of power and eventually they will have to be built inland; a matter that will be contested wherever the wind farms are proposed to be built.

Solar Energy.

Solar energy is probably the most common form of alternative powers for everyday people and you can see solar lights ad other solar accessories in many gardens. Governments are beginning to offer grants to assist in paying for photovoltaic roof tiles; these tiles are easily fitted onto your roof and collect the heat from the sun. This heat can either be used to heat water or can even be converted into electricity. The advantage for the consumer is that by including a grid tie system you can actually sell unused electricity back to the grid. Photovoltaic tiles take the place of ordinary roof tiles and can be perfectly blended to fit the look of the outside of your house. With solar energy you too can help the environment.

Biomass.

Ask most people which renewable energy source is the most widely used and they would say either wind or solar, but they’d be wrong or at least they certainly would in America. Since 2000 Biomass has been the most highly produced alternative energy in the United States. Using plant and animal material to create energy isn’t without its downfalls. It would almost certainly meet with competition from residents if biomass power stations were to be created in built up areas. The decomposing plants and animal waste creates an awful smell that is incredibly difficult to mask but it is very renewable (there’s always plants and animal waste).

Other renewable energy sources.

These are the main three renewable energy sources that the countries of the world are creating at the moment but there are others. Whether nuclear power is a viable alternative or not is a debate that will undoubtedly rage on forever, but it is a renewable energy and some countries already have extensive capabilities to produce it. Modern technology means that nuclear power stations are safer than they’ve ever been and damage to people, animals or plantation is highly unlikely. However, it takes a long time to develop nuclear power station and even plants that are already being built may take ten years to come to fruition.

Hydropower is used in some countries and uses the motion of waves to create energy. While it is a possibility, the amount of energy produced is minimal and the outlay to set these schemes up is quite large. Without further investigation and improvement in the techniques used it is unlikely that Hydropower will become a major player in the renewable energy world.

For more more information about alternative energy please visit http://www.alternative-energy-solutions.com

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