[RE-wrenches] Friend with system needs help

[Roy Rakobitsch]

I have these same modules at my home (circa 2002 i believe). I have found
issues with two modules (out of 30 mods) that had intermittent connections
due to the spot welds opening on the tabs coming from the back sheet, going
to the diodes in the j box. I fixed it with very small stainless machine
screws and nuts with toothed washers. I woild look carefully at these
connections, as they are not easy to see problems. Good luck.

RoyR

Roy Rakobitsch
NABCEP Certified Small Wind Installer®
NABCEP Certified Solar PV Installer®
Certified Advanced Tower Climbing, Safety & Rescue
Wind/PV Design Engineer
Windsine LLC
631-514-4166
www.windsine.org
On Nov 18, 2015 3:38 PM, "Steve Jefferson" <Steve.Jefferson at sma-america.com>
wrote:

> Afternoon wrenches,
>
>
>
> I have a friend who I helped install second hand modules onto a pergola
> structure at their home.
>
>
>
> The system is as follows:
>
>
>
> 44 – Siemens SP-150
>
> 1 – SMA SB6000US-12 (XFMR unit)
>
>
>
> Since install, they have not produced half of what they should be.  I have
> tested the diodes and they seem to be good, there were a couple that tested
> questionable, so they were replaced.
>
> VOC is good, but it seems that under load the system goes to garbage.
>
>
>
> I am at a loss of what/how to test anything else that may determine cause.
>
>
>
> Would a PV Analyzer help? Would there happen to be anyone in the
> Sacramento area with one who could come to the site? Obviously the customer
> will pay for their time.
>
>
>
> Thanks in advanced.
>
>
>
> SMA America, LLC
>
> Steve Jefferson
>
> Service Line Supervisor
>
> 3925 Atherton Ave
>
> Rocklin, CA 95765 - 3714
>
> U.S.A.
>
> Tel:  +1 916 625 3185 (direct)
>
> Fax: +1 916 625 0871
>
> Mobile: +1 916 622 4253
>
> Email: Steve.jefferson at SMA-America.com
>
> www.SMA-America.com <http://www.sma-america.com/>
>
>
>
> [image: cid:image001.png at 01CF1CFA.FE18BEB0]
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>
>
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