Flash Test Data [RE-wrenches]

[Joel Davidson]

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Hi David,

I used IV curves to optimize voltage strings for Southern California Edison 
PV systems because the modules were from an early production run and the 
utility was going to perform annual power tests for guaranteed performance. 
SMUD required IV curves for 8,600 modules I used on some projects, but I 
think they just filed the IV curves in a box and stuck the box in an unused 
cubicle. Providing IV curves adds cost, but manufacturers could easily ship 
IV curves with each pallet of modules. If module quality is good and 
production is uniform, then it should be unnecessary to match IV curves for 
projects under around 10 kW. For projects over 10 kW, sorting through 
modules and matching IV curves is costly. Do you think that the installers 
want IV curves because they do not trust the manufacturer's ratings?

Joel Davidson


----- Original Message ----- 
From: "David Katz" <david at aeesolar.com>
To: <RE-wrenches at topica.com>
Sent: Friday, June 15, 2007 10:17 PM
Subject: Flash Test Data [RE-wrenches]


>
> Dear Wrenches,
> We have several requests from installers to supply flash test data on 
> modules for large grid tie projects so that the installer can match he 
> modules in each string to get higher efficiency from the array.  Is anyone 
> doing this?
> Thanks,
> David
>
> David Katz
> AEE Solar, Inc.
> formerly Alternative Energy Engineering
> 1155 Redway Drive - Box 339
> Redway, CA  95560  USA
> Phone 707-825-1200
> Fax 707-825-1202
> email dkatz at aeesolar.com
> www.aeesolar.com
>
>
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