[RE-wrenches] panel failure

[Allan Sindelar]

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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