[Greenbuilding] Power Line Shading of Photovoltaic Collectors

[elitalking]

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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