[RE-wrenches] panel failure

[Roy Rakobitsch]

Ron, I replied a few days ago, ill fwd if you want.

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 Sep 16, 2015 1:57 AM, "Brian Teitelbaum" <bteitelbaum at aeesolar.com>
wrote:

> Ron,
>
> I'll pipe in here. If the module "works" when he bypasses the diodes, then
> the diodes, or the solder connections on the ribbons or the diodes, must be
> at fault.
>
> I put "works" in quotes because we don't have the details on the meter
> readings.
>
> Brian
> AEE Solar
>
>
>
> -----Original Message-----
> From: RE-wrenches [mailto:re-wrenches-bounces at lists.re-wrenches.org] On
> Behalf Of Ron Young
> Sent: Tuesday, September 15, 2015 11:45 PM
> To: RE-wrenches
> Subject: Re: [RE-wrenches] panel failure
>
> Thanks Allan, I was wondering about the lack of response as this group is
> always very helpful. One begins to suspect the phantom cause, i.e. the rest
> of the story that wasn’t told to us by the customer. It happens from time
> to
> time ;-)
>
> Ron
>
> > On Sep 15, 2015, at 9:07 PM, Allan Sindelar <allan at sindelarsolar.com>
> > wrote:
> >
> > Ron,
> > The lack of response may indeed be your answer. I didn't reply because it
> > hasn't happened on my watch and I have no idea what would cause what you
> > describe.
> > Allan
> >
> >> On Sep 15, 2015, at 8:30 PM, RM You <solareagle at solareagle.com> wrote:
> >>
> >> 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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