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Solar Panels Overview

Solar panels are devices for capturing the energy in sunlight.
Solar panels contain arrays of solar cells that convert light into electricity. They are called solar after the sun because the sun is the most powerful source of the light available for use. The solar cells are sometimes called photovoltaic cells, photovoltaic meaning literally "light-electricity". Solar cells rely on the photovoltaic effect to absorb the energy of the sun and cause current to flow between two oppositely charged layers.
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Solar panel uses

Solar panels currently make up only a very small portion of the world's electricity production, mainly held back by the relatively high cost of purchase and installation. They have become routine in certain applications, such as powering devices in deserts and other remote areas. Many yachts and land-vehicles use them to charge on-board batteries away from grid power.
Incentive programs offering financial incentives like the ability to sell excess electricity back to the public grid have greatly accelerated the pace of solar power in some countries like Spain, Germany, Japan and the United States. Even with these incentives however, the start-up costs associated with solar electric panels can be quite substantial.

Examples

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Solar panel at gas station.
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Solar panel at roof of house.
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Closer view of solar panel.

 Latest News

Energy Department Defends Funding of Foreign-Owned Renewables Projects - New York Times (blog)

ViaLogy wins renewable energy contract with Enel - Reuters

DOE Chief Urges Energy Leaders to Accept Curbs on Greenhouse Gases - New York Times

GWSC Is Growing Rapidly in the Green Energy Sector - SYS-CON Media (press release)

China Targets Battery Pilot Project For Renewable Energy - Wall Street Journal

Yingli Green Energy Holding Co. Ltd. Q4 2009 Earnings Call Transcript - Seeking Alpha (blog)

Followup Nuclear Energy ? Green Power - Energy Collective (blog)

Markell wants higher green-energy requirements for Delmarva Power - The News Journal

Future role of natural gas discussed at Houston energy conference - Fort Worth Star Telegram

Study Shows Bright Green Future for Smart Appliances - Triple Pundit

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