[RE-wrenches] panel failure

[Dana]

Have you looked very carefully for any brown spots on the panels where a junction may have burned? 

I have had a couple of old arrays in the last few years go south and there were very small burned connections, sometimes accompanied but a slight brown mark or bubble on the front & back of the modules. To their credit Kyocera actually replaced 2 complete arrays including freight and (cough) another large Manu same name Euro OIL Company dodged the replacement with verbiage twice. This has been a lesson in reading the fine print. 

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Dana Orzel 
Great Solar Works, Inc -  NABCEP # 051112-136
E - dana at solarwork.com  - Web - solarwork.com 
O - 970.626.5253  C - 208.721.7003
"Responsible Technologies for Responsible People since 1988"  
 Please consider the environment before printing this email.



-----Original Message-----
From: RE-wrenches [mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of RM You
Sent: Tuesday, September 15, 2015 9:30 PM
To: RE-wrenches
Subject: Re: [RE-wrenches] panel failure

Just wondering if any esteemed wrenches have an idea what could cause this problem? Customer says nothing unusual happened that he is aware of and the panels had been working fine for many years but now 4 of 6 panels just quit. Doesn’t appear to be a diode failure.

Ron

> On Sep 11, 2015, at 4:58 PM, RM You <solareagle at solareagle.com> wrote:
> 
> I have a customer who has 6 siemens 48w panels that are 20 years old (hooked in parallel to a 12v battery). He says that 4 of them have failed in that there is no output unless he bypasses the diodes. However he pulled the diodes and checked them on a diode check and separately on a battery with a light bulb and they appear to be functioning correctly. Any ideas what could be causing this anomaly?
> 
> Ron Young
> 

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