[RE-wrenches] Module discoloration

[Dave Tedeyan]

Hi Kris,

REC had put out some module cleaning guidelines at some point. I would
assume these would hold up for any modules though. I've attached them here.
Cheers,
Dave

On Tue, Nov 19, 2024 at 11:11 AM Kristopher Schmid via RE-wrenches <
re-wrenches at lists.re-wrenches.org> wrote:

> I wanted to share a recent interesting experience with the group.
>
> I received a call from a client regarding module discoloration on a few
> modules on a ground mounted array.  I asked her if the color discrepancy
> changed based on angle of observation or sun position and she said that it
> did not.
>
> Arriving on site, the discoloration was apparent.  It turns out that she
> was regularly watering some plants near the array and has very iron heavy
> hard water.  There was a layer of mineral deposits on the glass from the
> over spray.  A slight thumb rubbing removed the layer and the discoloration.
>
> This was a new one for me.  I am attaching a picture.
>
> In my climate we rarely have dirty module issues.  What would be the best
> product for cleaning the glass safely?
>
>
>
> Shine On!
>
> Kris Schmid
> Legacy Solar, LLC
> 137 West 1st Avenue
> Luck, WI 54853
> www.legacysolar.com
> 715-653-4295
> NABCEP Certified PV Installation Professional
> Licensed Wisconsin Master Electrician
> BSEE
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