Solar Cells
5 Steps for Cheap Solar Cells
Author: Justin R.
Residential solar electrical systems are an important way to supplement your home’s power demands. It can trim down your electrical bills significantly. Solar power is also very clean and all but unlimited. The technology has advanced enough to the point where residential solar energy systems have become really cost-efficient, cost-effective and easily implementable.
If you’re curious in setting-up your personal home system, here are 4 critical rules of thumb:
1 – Your Power Demands Calculating your entire day-to-day home power use is crucial. This assists you shape your system’s necessary generation electrical capacity needed to match your home’s self-sufficiency objective. You’ll be able to do this by tallying all your electrical appliances’ wattage and the amount of hours all the appliances are in use. Multiply the wattage by the hours to acquire the total of all your appliances.
2 – Follow the Rules Leave the cabling to a certified electrician. You run a risk of fire if you wire your system incorrectly. Always check with your city hall because virtually all places need reviews and permits while making major electric alterations to your household.
3 – Size Matters You don’t have to go “off-the-grid” altogether immediately. Most people begin with modest solar power systems that can slash power bills significantly. Beginning with a small-scale design first will assist you with learning the ins and outs of constructing such systems when averting expensive mistakes. When you design and install your home system, keep in mind for succeeding plans and elaborations. You will be able to eventually develop a big enough system that will entirely provide your household’s electrical needs.
4 – Buying Solar Power Supplies Online By shopping on the internet you will greatly increase your power to discover high-quality solar power equipment at very affordable prices. You’re also able to make a comparison of more providers quicker and a great deal more conveniently.
5 – Homemade Solar Cells are Cheaper Rather than paying professional solar array installers, why not do it independently? Even an absolute beginner can manage building a solar panel with the help of a good homemade solar cell guide. Modest-sized solar power systems are extraordinary investments, which can save you thousands of dollars every year. To learn more about solar panel construction, go to http://www.squidoo.com/solarcabin for a step-by-step guide on how to use the sun to power your home!
Article Source: http://www.articlesbase.com/diy-articles/5-steps-for-cheap-solar-cells-1061271.html
About the Author
To learn more about solar panel construction, go to http://www.squidoo.com/solarcabin for a step-by-step guide on how to use the sun to power your home!
November 30, -0001
12:00 am #comment-1
Don’t know the proper formula to calculate what the least amount of Silicon monoxide needed to produce the least amount of reflection.
But to the second part of the question. The more light that is being reflected, the less light there is being absorbed by the solar cell. The less light there is being absorbed by the solar cell, the less light there is being transformed into energy of another type by said solar cell.
In other words, the more light that is being reflected, the less efficient the solar cell will be, in regards to producing electricity.
November 30, -0001
12:00 am #comment-2
Its very true that solar cell efficiency depends on the location where they are being used. This is primarily because of the tilt of the Earths axis as well as seasonal changes. Basically as you get closer to the poles the suns rays become more and more “spread” out because the land in those areas is facing away from the sun. On average days are shorter closer to poles as well because, depending on the location, they may never fully face the sun even in full summer, where as the equator directly faces the sun all year long. Weather can also have a big effect if you were to try and use solar cells in an area (Like Seattle WA) where its almost always cloudy.
However this is only one small problem that scientists are facing with solar cells right now. Right now they only can use a small percentage of the solar energy available. They are also extremely expensive compared to the amount of electricity they produce.
November 30, -0001
12:00 am #comment-3
They are too expensive ,and the pay out will probably not be very good. Note of caution !! mount them very sturdy as they have a lot of surface so a little wind can tare them up.
November 30, -0001
12:00 am #comment-4
You don’t have to use special water to clean rooftop solar panels. You can just hose them down.
Other than what was already said (temperature, pollution), weather of course. Solar cells are only 50% of their full capacity when it is cloudy.
And of course the obvious – time of day. They don’t work at night. None whatsoever. Solar energy is clean, infinite, and renewable. The only downside to solar energy is that it is expensive. In time, I believe that it will become more cost-effective.
I came accross a new, proven and tested home made wind power system and solar power system which eliminates our electricity bills. It was written by a Renewable energy enthusiasts Michael Harvey the diy called Earth4energy. You can get your copy to save energy and help environment while eliminating your power bills. Get it from here: http://homemadeenergyreviews.blogspot.com/
November 30, -0001
12:00 am #comment-5
Certainly the higher frequencies contain more energy. But photons with energy above the band gap energy of silicon are wasted.
wikipedia:
Photogeneration of charge carriers
When a photon hits a piece of silicon, one of three things can happen:
1. the photon can pass straight through the silicon — this (generally) happens for lower energy photons,
2. the photon can reflect off the surface,
3. the photon can be absorbed by the silicon, if the photon energy is higher than the silicon band gap value.
This generates an electron-hole pair and sometimes heat, depending on the band structure.
When a photon is absorbed, its energy is given to an electron in the crystal lattice. Usually this electron is in the valence band, and is tightly bound in covalent bonds between neighboring atoms, and hence unable to move far. The energy given to it by the photon “excites” it into the conduction band, where it is free to move around within the semiconductor. The covalent bond that the electron was previously a part of now has one fewer electron — this is known as a hole. The presence of a missing covalent bond allows the bonded electrons of neighboring atoms to move into the “hole,” leaving another hole behind, and in this way a hole can move through the lattice. Thus, it can be said that photons absorbed in the semiconductor create mobile electron-hole pairs.
A photon need only have greater energy than that of the band gap in order to excite an electron from the valence band into the conduction band. However, the solar frequency spectrum approximates a black body spectrum at ~6000 K, and as such, much of the solar radiation reaching the Earth is composed of photons with energies greater than the band gap of silicon. These higher energy photons will be absorbed by the solar cell, but the difference in energy between these photons and the silicon band gap is converted into heat (via lattice vibrations — called phonons) rather than into usable electrical energy.
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March 4, 2008
7:32 am #comment-6
What types solar cells are better for use in solar panels?
Amorphous cells, Polycrystalline cells, Single-Cell Solar cells
can you tell me which one is better according to power produced?
May 9, 2008
5:04 pm #comment-7
Solar Cells…?
Solar cells are devices that generate electricity when light is exposed to it. They are coated in transparent thin film, of silicon monoxide (Sio, n = 1.5), to minimize reflections.
Suppose you are designing a silicon solar cell (Si, n = 3.5), what is the minimum thickness you can apply to the surface of the cell that will produce the least amount of reflection for 552 nm of light, which is near the middle of the visible spectrum? Assume air n = 1.0.
WHY minimize the reflection from the solar cell?
Explain your answer. Thank you!
July 19, 2008
8:17 pm #comment-8
solar cells?
I’ve read before where the INTENSITY of the sun’s rays matter w/ regard to the rate at which energy is created/stored using solar cells. Is this true? If I live in California or Arizona, isn’t their exposure to the sun (based on intensity) greater than a person who lives in Arkansas or Oklahoma? Given this, I’m assuming that solar cells would be beneficial in the south, but it just may take longer….?
May 10, 2009
2:44 pm #comment-9
What are the environmental factors when using solar cells as an energy source ?
I am doing a project on the energy usage of solar cells. Other than pollution, because it is a category in itself, what are the environmental factors when using solar cells?
May 23, 2010
5:57 pm #comment-10
What wavelength of light do solar cells most efficiently transfer into electricity?
Pretty straightforward. As I understand it solar cells can be made to absorb one specific wavelength of light. Is there one specific wavelength (visible or not) that is easier to convert into electricity?