Photo-voltaics


Photovoltaics:

What is Photovoltaics?

Put simply, photovoltaics (PV) are the direct conversion of sunlight into electrical power. It's a process that involves the release of positive and negative particles as a result of the introduction of light into solar cells. The electrical circuit is created by many solar cells connected in series within special PV modules. The consequent physical reaction in the solar cells generates direct current, which can be converted to alternating current, depending on requirements.

As the PV modules that perform this function have no moving parts, the system
requires only minimal maintenance, and is silent in operation. Best of all, they generate
electricity without generating any of the harmful emissions currently threatening our
environment and climate.

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The photo below used courtesy of US Dept. of Energy.




The chart below shows model estimates of monthly average daily total radiation using inputs derived from satellite or surface observations of cloud cover, aerosol optical depth, precipitable water vapor, albedo, atmospheric pressure, and ozone resampled to a 40km resolution.