[RE-wrenches] Cell damage leading to ground fault?

[Jerry Shafer]

Wrenches, David,
Module damage can lead to system faults like the old school GFI or the new
insulation Resistance, an IR Curve tester can find quite a few issues but
GFI might be more difficult depending on what is going on,
Fun times

On Thu, May 8, 2025, 12:56 PM david quattro via RE-wrenches <
re-wrenches at lists.re-wrenches.org> wrote:

> Fronius install manual says the conduit entry ports need to be packed with
> putty around the wires. They’re the only manufacturer I know of that
> requires this. Water vapor roses into the circuit boards.    I used to get
> a couple different error codes until we packed the conduits.
>    Good luck, and let us know!
>
>
>
> On Thu, May 8, 2025 at 12:22 PM Dave Tedeyan via RE-wrenches <
> re-wrenches at lists.re-wrenches.org> wrote:
>
>> Hello,
>>
>> There is an installation that I am servicing with the Q.Peak G4 modules,
>> where one cell has some visible damage. I am wondering whether this type
>> damage can lead to a ground fault? The Fronius inverter on site is
>> picking up an "Insulation Resist" error. I am wondering whether this could
>> be the cause, or whether I should look elsewhere in the array. A photo is
>> attached. Any thoughts would be appreciated.
>>
>> Thanks!
>> Dave
>>
>> --
>>
>> [image: Logo] <https://www.sungineersolar.com/>
>> Dave Tedeyan, P.E.
>> Owner | Sungineer Solar
>> p: he | him | his
>> a: 1653 Slaterville Rd.
>> <https://www.google.com/maps/search/1653+Slaterville+Rd.+%C2%A0+%7C%C2%A0Ithaca,+NY+14850?entry=gmail&source=g>
>>
>> <https://www.google.com/maps/search/1653+Slaterville+Rd.+%C2%A0+%7C%C2%A0Ithaca,+NY+14850?entry=gmail&source=g>| Ithaca,
>> NY 14850
>> <https://www.google.com/maps/search/1653+Slaterville+Rd.+%C2%A0+%7C%C2%A0Ithaca,+NY+14850?entry=gmail&source=g>
>> w: www.sungineersolar.com <http://www.sungineersolar.com/>
>> c:
>> <https://www.google.com/maps/search/1653+Slaterville+Rd.+%C2%A0+%7C%C2%A0Ithaca,+NY+14850?entry=gmail&source=g>(607)
>> 270-0370
>> _______________________________________________
>> List sponsored by Redwood Alliance
>>
>> Pay optional member dues here: http://re-wrenches.org
>>
>> List Address: RE-wrenches at lists.re-wrenches.org
>>
>> Change listserver email address & settings:
>> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>>
>> There are two list archives for searching. When one doesn't work, try the
>> other:
>> https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/
>> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
>>
>> List rules & etiquette:
>> http://www.re-wrenches.org/etiquette.htm
>>
>> Check out or update participant bios:
>> http://www.members.re-wrenches.org
>>
>> _______________________________________________
> List sponsored by Redwood Alliance
>
> Pay optional member dues here: http://re-wrenches.org
>
> List Address: RE-wrenches at lists.re-wrenches.org
>
> Change listserver email address & settings:
> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>
> There are two list archives for searching. When one doesn't work, try the
> other:
> https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/
> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
>
> List rules & etiquette:
> http://www.re-wrenches.org/etiquette.htm
>
> Check out or update participant bios:
> http://www.members.re-wrenches.org
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20250508/a0d06d98/attachment.htm>