[Greenbuilding] Electrical line shading of solar PV modules
Gordon Howell -- Howell Mayhew Engineering
ghowell at hme.ca
Mon Apr 4 10:22:35 CDT 2011
Thanks for your question Eli:
It doesn't appear that the electrical lines would be a significant
issue. They are likely smaller than the sun's disc.
If you use Enphase module-inverters (one inverter for each PV module)
then any shaded module wouldn't affect the PV array's performance,
because each PV string is a PV module.
To clarify: the industry term that is an internationally-recognised
standard for PV modules is "module", not collector, not panel. See
attached file for pictoral description.
+Gordon Howell
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Gordon Howell, P.Eng.
Grid-Connected Solar PV Electric Systems
Design, Development, Supply, Commission,
Performance Monitoring
Howell-Mayhew Engineering, Inc.
Edmonton
Phone : +1 780 484 0476
E-mail: ghowell at hme.ca
Web : www.hme.ca
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>Date: Sun, 3 Apr 2011 23:57:51 -0400
>From: "elitalking" <elitalking at rockbridge.net>
>To: "listserv Green Building new"
> <greenbuilding at lists.bioenergylists.org>
>Subject: [Greenbuilding] Power Line Shading of Photovoltaic Collectors
>
>I am evaluating a site to install photovoltaics. I am aware that
>there is a big penalty for partial shading. The potential location
>that is without obstructions almost all the time between 9am - 3pm
>all year, except for 5 power lines. The poles do not shadow the
>potential collectors. Is that enough to significantly reduce
>performance. Otherwise, the location is excellent for the other
>more solid obstructions like trees and buildings.
>
>Thanks for your consideration.
>Eli
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