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Double Sided Solar Panels |
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Solar Energy - Double Sided Solar Panels
 Doubled Sided Solar Modules / Spatial Technology - World Innovation
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The technology of Bifacial-Windsol panels came up from the space needs
of the Soviet Union. For the satellites, the only energy source is the
solar energy and solar cells are used for their instrument support. In
order satellites with panels to be power self-sufficient, back side
cells’ smoothing technique was invented and its closure in “glass - glass” sandwich. This invention lead to a product that produces more
energy from smaller surface.
The efficiency of photovoltaic systems, to a large extent, depends on
the time that the system “sees” the sun perpendicularly.
The conventional panels take advantage of only a part of the given solar
energy, since they are active only from the front side. Their single
side is activated when the sun is in the south half of the horizon and
in an area of 150o .
On the contrary, Bifacial-Windsol panels are also taking advantage of:
a)
the time that the sun is located north of the imaginable axis east-west,
which during the summer time is more than 7 hours per day, b) the
diffused sunlight and c) the reflected sunlight.
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The picture above shows the change of sun’s position, in regard of the
maximum and the minimum height in winter (21st of December) and in
summer (21st of June), which ranges at 28o – 75o (in Athens - Greece),
as regards the horizontal axis.
We can see as well the constant change of sun’s position in the horizon
during the year (East – West) that is the sunshine duration, that
ranges from 142,5o in winter (21st of December) to 222o in summer (21st
of June) counting from North. This change is shown in gray sections on
the picture above.
The manufacturers of Bifacial-Windsol panels, confident for its great
quality and durability, provide 5 years product guarantee and 25 years
power output guarantee for more than 80 % of minimum rated power.
Picture of the back and front side of double-sided modules.
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 back side
 front side
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Solar Energy 
