[RE-wrenches] Inter row shading: Portrait V landscape

[William Miller]

Friends:

We field tested the concepts this morning and the answer is "yes" 
(inter-row shading in portrait mode: bad -- in landscape mode: less bad).

William



At 08:40 PM 4/22/2010, you wrote:
>Friends:
>
>99% of the time, we install modules in portrait mode.  We find ourselves 
>installing a set in landscape with some short inter-row spacing, due to 
>roof vents.  We are using Solarworld SW230 modules.
>
>It is my understanding that shading the short edge of this type of module 
>is much more detrimental to the output than shading a long edge.  This is 
>because of the manner in which the cells within the module are arranged in 
>series.  I understand that one string is on the bottom half of a module 
>and the other on the top half of a module in the landscape 
>orientation.  In order for the module to cease power production, you have 
>to shade at least one cell from each of the two internal 
>strings.  Therefore, you need to shade more than half of a module in the 
>landscape mode before the module before the output declines drastically.
>
>Is my understanding here correct?  I will be testing this tomorrow if 
>weather permits.
>
>Thanks in advance.
>
>William Miller
>
>
>Please note new e-mail address and domain:
>
>William Miller
>Miller Solar
>Voice :805-438-5600
>email: william at millersolar.com
>http://millersolar.com
>License No. C-10-773985
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Please note new e-mail address and domain:

William Miller
Miller Solar
Voice :805-438-5600
email: william at millersolar.com
http://millersolar.com
License No. C-10-773985
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