PV module temp [RE-wrenches]

Smitty smitty at aaasolar.com
Tue Sep 25 07:45:43 PDT 2001


Trav, the insulation is probably giving you a high reading. The sensor should be
exposed to the same atmosphere that the back of the panel is. Smitty.

"Travis Creswell, Ozark Solar" wrote:

> Hey Gang,
>
> I have hooked up a Heliotrope Quadra Temp four channel temp monitor that
> uses 10k sensors.  One of the channels is monitoring temp on the back of a
> module in my roof mounted PV array.  I'm seeing temps of nearly 140 F on
> sunny days that the ambient temp doesn't get past 80 F.  That seems pretty
> high.  The sensor is fine as it reads ambient temp accurately after sunset
> plus I checked it before I installed it.  I siliconed the sensor along with
> a small piece of Armaflex insulation on the back approximately in the center
> of the module.
>
> I insulated it so the temp would be more accurate but now I am wondering if
> I'm not holding heat in with the insulation causing the temp to be too high?
>  But if I don't insulate it won't it read too cool?
>
> Suggestions?
>
> Thanks in advance.
>
> Travis Creswell
> Ozark Solar
>
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