Bill
Appreciate the feedback. One of the questions that I'm seeking to determine-
how much light will filter through the spaces between the cells to the surface
below?
Lets say for someone that wants to grow orchids- they need low light, as an
example.
Wondering how much light is diffused through the panels to be able to do things
like grow orchids and or have filtered light to work?
As an example: Do any of you have irradiance measurements on any carports that
have done bifacials and determined how many watts sq m are below?
Keith
________________________________
From: Bill Brooks <billbroo...@yahoo.com>
To: 'Keith Cronin' <electrich...@yahoo.com>; 'RE-wrenches'
<re-wrenches@lists.re-wrenches.org>
Sent: Tuesday, November 1, 2011 11:44 AM
Subject: RE: [RE-wrenches] Bifacial modules
Keith,
This is easy to test. Simple take an irradiance sensor, turn it upside-down and
test the irradiance on the bottom surface of any PV array. It will vary greatly
based on exposure to reflected light and so on, but it will rarely be above 100
W/m^2. 10% improvement is an absolute maximum for any bifacial technology, and
that is on the high side. Any claims above 10% are ignoring the physics of
sunlight, reflectance of typical materials, and PV.
Nothing wrong with bi-facials. They are beautiful to look at. I would buy them
based on aesthetics, not on performance.
Bill.
From:re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Keith Cronin
Sent: Tuesday, November 01, 2011 1:04 PM
To: RE-Wrenches
Subject: [RE-wrenches] Bifacial modules
Hi
Was wondering if any of you have installed bifacial modules and know what the %
of light that comes through to a surface below the modules?
Looking for a canopy type of installation/ application and wondered if you have
any #'s?
Thank you~
Aloha,
Keith
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