[RE-wrenches] panel failure

[Brian Teitelbaum]

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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