[RE-wrenches] Kyocera 120's low voltage

[Christopher Warfel]

Same here. Kyocera was very good at providing replacements and covering 
reasonable labor.
On 6/11/2014 8:20 PM, Jerry Shafer wrote:
> David
> The KC 120 had some issues with soldered connections on the module 
> looks like a cigarette burn from the back or maybe just a blister, it 
> will be on the shrt side of the module. Anyway it will drop the module 
> in half most of the time or try to work while it burns the poorly 
> soldered connection, it will also get bery hot as it is arcing inside. 
> You need the SN# and call the manufacture if its on there list it 
> might be replaceble they can tell you. As I recall its a C that is the 
> SN that has an issue but check to make sure.
> I have replaced entire arrays because of this.
>
>
> On Wed, Jun 11, 2014 at 4:47 PM, Dave <dave at independentpowerllc.com 
> <mailto:dave at independentpowerllc.com>> wrote:
>
>     Wrenches,
>
>     I troubleshot an underperforming off grid array today and found
>     low Voc's in 4 out of 10 KC-120's (nominal 12v modules rated at
>     21.5 Voc and 7.45 Isc).  Modules are vintage 2000.
>
>     Under modest sunlight (500 to 600W per M sqd) 6 modules measured
>     from 18 to 19 Voc and 4 Isc. Four modules measured from 9.6 to
>     13.7 Voc and 4 Isc.
>
>     I was chased off the roof by a coming thunderstorm and did not
>     check for bad diodes. These modules have nice old school J-boxes
>     with 6 diodes per each module.
>
>     Am I looking at a diode issue, or failing modules?
>
>     Thanking you in advance for your time,
>
>     David Palumbo
>
>     Independent Power LLC
>
>     462 Solar Way Drive
>
>     Hyde Park, VT 05655
>
>     802-888-7194 <tel:802-888-7194>
>
>
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-- 
Christopher Warfel, President
ENTECH Engineering, Inc.
PO Box 871, Block Island, RI 02807
401-466-8978

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