Photo-Voltaic Solar Panels
Put "simply," a photo-voltaic cell is comprised by a series of
photodiodes. Photons from light propel electrons associated with
the metallic substrate of the solar panel into a higher energy state
that are then displaced, creating direct current. A large number
of cells are contained in an individual panel, the total output of which
varies as a function of the rating of the photodiodes used and the
number that are accommodated by a single panel. Photo-voltaic
technology is one of the very few sources of power that does not derive
from the turning of a coil of copper wire around a magnet, and it is a
completely carbon-neutral source of power.
Solar panels have experienced dramatic price drops in the second half of 2009.
At $3.11 per watt FOB San Jose, Costa Rican panel prices have never been lower.
Current generation panels max out at 270 watts but are available at the same
watt price for a full set of lower wattage panels, helpful for those wishing to
expand the existing capacity of existing arrays. For new systems, sizing
arrays with the largest available panel makes future expansion easiest to
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