Beginners Guide To Solar Power
May 8, 2012 by Liam Raikes
Filed under Science
The function of a solar cell is very simple. It takes light, and it makes it into electricity. It’s very simple, but that doesn’t mean it is easy. Imagine if you were tasked to create something that could actually do that, most people wouldn’t know where to start. Well, by the end of this article, you’re not going to be an expert in how to build solar panels, but you should at least understand the principles involved.
How Does Light Become Electricity?
To answer this question of how it is that light becomes electricity, we have to be more clear about exactly what light is and what electricity is. There isn’t room to go into detail about this of course, but we can get a general idea.
A Photon
The most important thing to know about light when it comes to solar panels is that it can be viewed in two ways, as being made up of waves and as being made up of particles. In fact both is true, which is a bit strange, but this is something that has come out of quantum physics.
In terms of solar cells, the most useful way to think about light is as being made up of particles of light. That is what a photon is, it is the name for a particle of light. If you’re wondering how light can be thought of as being particle based, in terms of waves it is the smallest packet of waves that you can get (if that makes it any clearer!).
What Is Electricity?
Electricity consists of the uniform flow of electrons in a substance. The substance has to have certain qualities which allows this to happen, they have to be made up in a particular way. When the conditions are right, then we call that material conductive, because it can conduct electricity. This applies to metals mostly.
There is another type of material though which conducts electricity in a slightly different way. It still has to do with the electrons flowing, but this flow can be created by the existence of “holes” in which there should be an electron. This hole will attract an electron, so that is how electricity can flow as well. Substances that do this are called semiconductors.
Solar Cells
With this information, the way that a solar panel actually works can be described more easily. The first thing to know is that they are made of a semi-conductive substance, often silicone. The important thing about this is that when a photon hits the semiconductor which the cell is made of, it pushes an electron out of its orbit and this creates a “hole” in it, like the ones described above. This is what causes electricity to flow.
It’s not quite as simple as getting a semiconductor and hooking it up to some wires though. There are actually two halves, one of which has to be negatively charged and the other half has to be positively charged. In their normal state, these halves are balanced, but when light hits them the balance is upset and that is what makes the electrons move in a uniform way.
How The Solar Electricity Is Made Useful For Your House
A little bit more work has to be done before the electricity can be used in a house though. It comes out as direct current (DC) but houses run on alternating current (AC) so it has to be converted before it can actually be useful.
On the way to the converter, however, it makes a stop in a battery. This is a DC battery, and that’s where the electrical energy from the solar cells are stored, so that it can be used when needed.
If you are interested in becoming helping in the fight against global warming, go to Solar Energy UK to get more information about solar panels. That is the website where Cameron Knill enjoys writing more about renewable energy sources.
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Locating The Optimal Solar Power System Installer
November 28, 2011 by Kenneth B. Jackson
Filed under Science
If you want to “go green” and save money, then considering solar energy might be a good option for you. Solar power allows people to reduce their monthly electricity bills, while also utilizing the Australian rebate program to make solar system installation more affordable and beneficial. At first, knowing where to begin in order to buy a solar energy system can be intimidating. To help with the procedure, you can hire a professional installer, but there are some aspects you should personally take into consideration before beginning.
The first factor is cost. This is obviously an important factor for many people, but it might not be relevant in the way you think it should. When investing in a solar energy system, it is actually more beneficial to buy a system that may be on the costly side (as long as it has the quality to back up the price). The reason for this is that you “get what you pay for”, and as solar energy systems tend to last for more than twenty years, you will be making a good investment.
A second aspect to look at when finding a solar energy installer is their warranty. As mentioned before, solar systems should reliably work for at least twenty years, and a solar power installer should have a warranty to back this up. The solar panels in a photovoltaic system degrade at 0.5% to 1% a year, but this should still leave you a lot of time to benefit from your renewable energy source. Having a warranty that is actually backed by a company in Australia is also pivotal – in certain instances another country may back the warranty, which means you could end up paying very high postage fees to send them any damaged equipment should something run amiss.
Workmanship is one other important but usually neglected factor. Quality solar systems can be very eye-catching. Your contractor must be able to inform you of what sort of mounting system they often use, and also if they allow air to flow beneath the panels or not. Unprotected cables must be taken note of; they are significantly less able to withstand the temperature of the sun than the panels are, therefore all external wires should be in a UV guarded conduit. You can even ask for recommendations from other clientele and check to see if an installer will show you a selection of their earlier work. A good quality solar technology system needs to be straightforward but effective.
The last thing it’s best to take note of is merely how well you get along with your contractor. Are they really ready to respond to your questions and are they available to help? Confirm they are licensed by the “Clean Energy Council”, because this is quite important. All installers have to have this certification in order for the government to pay out its refunds to you. Should you pay attention to the particulars, you’re definitely halfway to owning a wonderful renewable power system, but make sure your installer is willing to meet you in the middle and support you along the journey.
Experience the potential of solar power and how it is being utilized to help reduce emissions and conserve revenue throughout Australia. Receive 3 no cost estimates on solar panels or a solar system for use in your dwelling or business.
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