1.  The Solar cell arrays I have seen, are not taking full advantage of the sun's energy.  It is simple to add a heat exchanger to the array and capture some of the heat.  For instance, adding stainless steel tubes to the aluminum surface of an array minimizes corrosion.  Using the heat energy will help to take less years to pay off your investment in solar arrays.  This could help companies, like SunPower Corp and BP and PowerLight and ...

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