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Can I use all of my normal 120/240 VAC appliances?
Refrigeration and lighting are typically the largest 120 VAC energy consumers in a home (after electric heating loads) and these two areas should be looked at very carefully in terms of getting the most energy efficient units available. Great strides have been made in the past 5 years towards improving the efficiency of electric refrigerators/freezers. Compact fluorescent lights use a quarter to a third of the power of an incandescent light for the same lumen output and they last ten times longer. These fluorescent lights are now readily available at your local hardware or discount store. The rule of thumb in the renewable energy industry is that for every dollar you spend replacing your inefficient appliances, you will save three dollars in the cost of a renewable energy system to run them. So you can see that energy conservation is crucial and can really pay off when considering a renewable energy system.
Should I wire my home for AC or DC loads?
It depends on the size of the system and what type of loads you want to run. DC appliances are usually more efficient than AC since you don't have to worry about the loss through the inverter, but DC loads are typically more expensive and harder to find than their AC counterparts. Small cabin and RV systems are typically wired DC while most home systems are wired for AC loads exclusively. With improvements in inverter efficiency and reliability in the last 5 years, AC is the way to go for a home system. Another advantage AC has over DC is that the voltage drop for a 120VAC circuit is much less than a 12VDC circuit carrying the same power, which allows you to use smaller gauge wire.
How much will a system cost for my 2000 square foot home?
To accurately size a system to meet your needs, we need to know how much energy you use per day. If your home is connected to the utility grid, simply look at your monthly electric bill. Using this information, your authorized Afghan Solar Dealers can design a system to meet you needs.
Advantages of Solar technology:
Saves you operating costs on your electricity bills. Allows you to become energy neutral and never pay an electricity bill again. Reduces your carbon footprint and helps to save the environment. Requires no fuel. Little or no dependence on fuel. Generates NO waste. Minimized impact on land use and ecology. Requires low maintenance.
What is solar energy?
Solar energy takes advantage of the sun's rays to generate heat or electricity. It is an infinitely renewable resource and unique for its ability to generate energy in a quiet, clean, and consistent manner. Can't beat the sun for being oh-so-cool!
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Interesting Facts
One wind turbine can produce enough electricity to power up to 300 homes.
There are five main forms of renewable energy: solar, wind, water, biofuel and geothermal (heat from the earth).
A world record was set in 1990 when a solar-powered aircraft flew across the USA in 21 stages, using no fuel at all.
Every hour on the Earth's surface falls enough solar energy to meet world energy needs for an entire year. Our energy problems would be solved if we find a way to harvest that energy.
Renewable energy sources are used from ancient history: In 200 B.C., people in China and the Middle East used windmills to pump water and grind grain. Also, old Romans were among the first to use geothermal energy to heat houses.
The UN Development Index ranks Afghanistan 169 out of 174 poorest countries in the world.
The facts about solar energy are not just about technology however. The facts of life include that the adoption of solar energy alone is not going to bring about a sustainable world. Without a greater warmth of positive human interaction it will still be a cold, and unsustainable, world.
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Perhaps the future is here now. Shell has predicted that 50% of the world's energy will come from renewable sources by 2040. Shell will also join in a massive renewable energy development project supported by the UAE. Several industrial heavyweights will join them: British Petroleum, Total, and Occidental Petroleum Corp, General Electric, Rolls Royce, Fiat and Mitsubishi.
Solar Collectors transform short wavelengths into long wavelengths and trap this energy in the form of heat which is transferred and transported into a heat storage vault. Solar panels convert selected wavelengths of light into electricity.
In recent years manufacturing costs of photovoltaic cells has dropped by 3-5% per year while government subsidies have increased. While to some such facts about solar energy seem trivial, this makes solar energy an ever-more affordable energy source.
As renewable energy technology develops and fossil fuel prices increase solar energy becomes more affordable. And there are no crippling, rising importation costs of coal, oil or gas.
An average wind speed of 14mph is needed to convert wind energy into electricity.
There are five main forms of renewable energy - solar, wind, water, biofuel and geothermal (heat from the earth)
Renewable energy is energy generated from natural resources - such as sunlight, wind, rain, tides, and geothermal heat - which are renewable (naturally replenished).
In 1838, Edmund Becquerel was the first man to theorize about the possibility of turning sunlight into energy. His ideas were considered not worth pursuing.
That PV industry today is 10 times larger than 1998 and likely to grow by 50% annually in the coming years; solar power is on the verge of reaching cost parity with conventional energy sources
The human use of solar energy is not new. The history of solar energy is rich. Building methods have for many centuries taken account of the sun’s movements in optimizing its warmth and light.
The largest wind turbine in the world, located in Hawaii, stands 20 storeys tall and has blades the length of a football pitch.
The energy output of a 1 KW solar energy unit is roughly equivalent to the burning of 170 pounds of coal and 300 pounds of carbon dioxide being released into the atmosphere.
Renewable energy supplies will never run out. While the supplies of coal, oil, and natural gas are limited, sunshine, wind, biomass, and water power are considered almost limitless resources.
Ever the innovator, Albert Einstein won the Nobel Prize in Physics 1921 for his ground-breaking experiments with solar power and photovoltaics.