Solar Panels

Photovoltaic

The amount of sunlight reaching the surface of the earth every hour contains enough energy to meet the world’s energy demand for an entire year. As a global leader in energy efficiency and sustainability, Johnson Controls wants to help you harness a portion of the sun’s energy to help you meet your energy needs using this most renewable of resources.

Solar energy can be converted directly (photovoltaic) into electricity through photovoltaic devices. The resulting electricity can offset utility costs.

Photovoltaic energy is the conversion of sunlight to electricity through a photovoltaic cell (PV), a non-mechanical device usually made from silicon alloys. As sunlight strikes a PV cell, it creates an electron imbalance between the front and back surfaces of the cell. Electricity occurs when these two surfaces are joined together by a conductor. Individual PV cells are electrically connected into a packaged, weather-tight module. Depending on the power output needed, modules can be further connected to form a PV array, essentially a generating plant made up of any number of modules.

Is this the right technology for my situation?

For photovoltaic technology to be considered, the facility should be tied to the grid and/or have ability for a stand alone photovoltaic system to provide electricity at or near current costs when state incentives are factored in and/or electricity rates are above $.10 to $.12 per KWH.

Solar Power Facts:

(Source: Solarbuzz.com)
Worldwide photovoltaic installations increased by 1,744 MW in 2005, up from 1,460 MW installed during the previous year. In 1985, annual solar installation demand was only 21 MW.
For comparison purposes, total worldwide wind energy installations in 2000 were around 4,000 MW, growing at about 35% per annum.
Cumulative solar energy production accounts for less than 0.01% of total Global Primary Energy demand.
Solar Energy demand has grown at about 25% per annum over the past 15 years (hydrocarbon energy demand typically grows between 0-2% per annum).
The US market showed 33% growth in 2006.

To read a more in-depth review of this technology, visit the NREL website:

http://www.nrel.gov/learning/re_solar.html

Did You Know?

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