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In 1985 annual worldwide solar power system installation accounted for 21 megawatts of  power. By 2004, this had multiplied to an incredible 927 megawatts in new installation power  production alone.

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he demand for solar produced energy over the last several years hasincreased annually about 25% ,although in 2004 sales were up a whopping 67%from the previous years.

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here are several reasons for this increase in popularity for all things Solar Powered.Beyond the obvious environmental considerations and the privilege of not having to rely on power from a grid that is aging and stretched to capacity, solar is getting cost effective.

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hiletraditional energy production gets more expensive, technological advances are making solar  power cheaper.In 1980 the cost of harvesting energy from the sun stood at about $100 per watt. Literallya hundred times more expensive than the going rate of electricity, these systems were noteconomically viable. By 1999 however, technology had reduced this about $4per watt andcosts have continued to decline by about 5% per year since.

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he Return on Investment is becoming very attractive for many commercial organizations and consumers.Efficiencies have been realized in several technologies.

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he inverters that transform thecollected DC energy into usable AC energy used to deliver only about 65% efficiency.35% of the collected energy was lost in the transformation process.

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oday¶s transformers are soefficient they deliver up to 96% of collected energy into usable AC current. Photovoltaictechnology has also made solar collection far more efficient.

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wenty years ago, only 5% of the sun¶s energy hitting a solar charging panel was harvested.

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his figure is now in excess of 15% and will continue to climb as more efficient compounds are designed and introduced inthe manufacture of these Photovoltaic Panels.

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