strings and shading [RE-wrenches]

[Jeff Clearwater]

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Hey  Tom,

Yes for a single channel inverter, the 2 columns will be better than 
the 2 rows.  That way when the shade hits you'll still have full 
production on half the array - rather than highly compromised output 
on both strings.  Also that west "column" will perform right up until 
its shading time and then drop off more quickly - which will optimize 
its use as well.

The same is true for the dual channel inverter.

Hope that helps!

Best,

Jeff C.
Village Power Design




>good day Wrenches,
>   Perhaps i forgot or was sleeping when it was covered, but i have a
>rather basic question concerning string wiring for shading conditions.
>Maybe someone has real-world vs. theory input on this.
>   We have an array of 10 modules racked 5 wide X 2 high with 2 strings.
>There is a tree to the west which will cast a "vertical" shadow in the
>afternoon. What is the optimal wiring configuration (2 rows of 5 each or
>  2 columns of 2 1/2 each) for this array given the following:
>- inverter cannot track strings seperately
>- inverter can track srings seperately.
>thanks,
>Tom
>
>
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-- 
~~~~~~~~~~~~~
Jeff Clearwater
Village Power Design
Sustainable Energy & Water Solutions for Home & Village
http://www.villagepower.com
gosolar at villagepower.com
NABCEP (tm) Certified Solar PV Installer

530-470-9166
877-SOLARVillage
877-765-2784
65 Schoolhouse Rd
Amherst, MA 01002
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~`~


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