Solar Arrays. [RE-wrenches]

[Jerry Caldwell]

Carl,

I'd expect a black backing to absorb heat, and
consequently heat the cells which are in direct
contact with it.  Further, the white backing reflects
photons back up to the cells that don't knock
electrons loose on their first pass through.  For
example, ASE makes 300W modules with a white backsheet
and clear encapsulant modules that are otherwise
identical which are rated at only 285W.  If you want
clear encapsulant 300W modules, they have to use cells
that test higher and would normally be used for a 315W
module.

Jerry Caldwell
Light Energy Systems
Concord, CA


--- "Carl Emerson, Free Power Ltd."
<freepower at freepower.co.nz> wrote:
> Hi there,
> 
> I am interested to know if there is thought to be
> any advantage in 
> painting the back of solar modules black.
> 
> My idea is to lower the panel temperature by
> increasing the radiant heat 
> and lowering the cell temperatures.
> 
> Is my logic flawed ??  Most of the modules are light
> in colour on the back.
> 
> Thanks
> 
> Carl Emerson
> Free Power Ltd.
> Auckland NZ
> 
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