[RE-wrenches] Friend with system needs help

Thu Nov 19 10:58:42 PST 2015

All 4 strings were run separately. And all 4 ran significantly lower than they should. Based off of calculations done.

Dan was nice enough to spend some time with me on the phone about this.
Think I may have another visit and more TS to do.

Probably wont be until after the holidays, but I will up if anything is found.

These mods are junk in my opinion, the lack of frame makes them weak. And when they were torn off the other roof in LA, the foam backing blocks just cracked and fell apart. Who knows what damage has been done to them.

Thanks

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<mailto:Steve.jefferson at SMA-America.com>
www.SMA-America.com<http://www.sma-america.com/>

[cid:image001.png at 01CF1CFA.FE18BEB0]<http://www.youtube.com/watch?v=yQWzPuyqhzo&feature=youtu.be>

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From: RE-wrenches [mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Brian Mehalic
Sent: Thursday, November 19, 2015 10:47 AM
To: RE-wrenches <re-wrenches at lists.re-wrenches.org>
Subject: Re: [RE-wrenches] Friend with system needs help

Steve, I didn't see if you answered Jay regarding operating the inverter on just a single string at a time.  I'd definitely try that before curve tracing.

Brian Mehalic
NABCEP Certified Solar PV Installation Professional™ R031508-59

PV Curriculum Developer and Instructor
Solar Energy International
http://www.solarenergy.org

On Thu, Nov 19, 2015 at 8:31 AM, jay <jay.peltz at gmail.com<mailto:jay.peltz at gmail.com>> wrote:
HI Steve,

So they are all low?

Then I suggest an IV curve tracer.

jay

On Nov 19, 2015, at 7:18 AM, Steve Jefferson <Steve.Jefferson at sma-america.com<mailto:Steve.Jefferson at sma-america.com>> wrote:

The outputs are pretty close. That’s what is throwing me off.
In most trouble shooting adventures, the problem is fairly obvious.
This one, not so much.

SMA America, LLC
Steve Jefferson
Service Line Supervisor
3925 Atherton Ave
Rocklin, CA 95765 - 3714
U.S.A.
Tel:  +1 916 625 3185<tel:%2B1%20916%20625%203185> (direct)
Fax: +1 916 625 0871<tel:%2B1%20916%20625%200871>
Mobile: +1 916 622 4253<tel:%2B1%20916%20622%204253>
Email: Steve.jefferson at SMA-America.com<mailto:Steve.jefferson at SMA-America.com>
www.SMA-America.com<http://www.sma-america.com/>

<image001.png><http://www.youtube.com/watch?v=yQWzPuyqhzo&feature=youtu.be>

This email and any attachments thereto may contain SMA America, LLC confidential, privileged and private material for the sole use of the intended recipient. Any review, copying, or distribution of this email (or any attachments thereto) by others is strictly prohibited. If you are not the intended recipient, please contact the sender immediately and permanently delete the original and any copies of this email and any attachments thereto. Thank you.

From: RE-wrenches [mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Jay
Sent: Wednesday, November 18, 2015 1:42 PM
To: RE-wrenches <re-wrenches at lists.re-wrenches.org<mailto:re-wrenches at lists.re-wrenches.org>>
Subject: Re: [RE-wrenches] Friend with system needs help

Hi steve.

Is the output from each string of 11 the same?
Have you tried ruining 1 string at a time?

Jay

Sent from my iPhone

On Nov 18, 2015, at 11:14 AM, Steve Jefferson <Steve.Jefferson at sma-america.com<mailto: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<tel:%2B1%20916%20625%203185> (direct)
Fax: +1 916 625 0871<tel:%2B1%20916%20625%200871>
Mobile: +1 916 622 4253<tel:%2B1%20916%20622%204253>
Email: Steve.jefferson at SMA-America.com<mailto:Steve.jefferson at SMA-America.com>
www.SMA-America.com<http://www.sma-america.com/>

<image001.png><http://www.youtube.com/watch?v=yQWzPuyqhzo&feature=youtu.be>

This email and any attachments thereto may contain SMA America, LLC confidential, privileged and private material for the sole use of the intended recipient. Any review, copying, or distribution of this email (or any attachments thereto) by others is strictly prohibited. If you are not the intended recipient, please contact the sender immediately and permanently delete the original and any copies of this email and any attachments thereto. Thank you.

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