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<div class="moz-cite-prefix"><br>
Absolutely right, Bill.<br>
We have a couple of these cameras and they are very handy.<br>
<br>
These cameras are also good for detecting high currents through
fuses (if you can see the<br>
fuses) and bad connections, etc.<br>
<br>
We had a Chinese module laying around (Astronergy 250W) and it
was sunny so I took a<br>
few pix. Short circuit and open circuit.<br>
<br>
You can see at least 15 to 20 degrees C difference sometimes. I
will have to check<br>
some other modules but I don't know if any manufacturers match
cells ?<br>
<br>
These pix are from the back of the module. You have to be careful
of reflections more<br>
from the front. <br>
The temperature at the top-left is where the crosshair cursor is
and the<br>
right scale is maximum (whitest) temperature and lowest (darkest)
temperature<br>
in view.<br>
<br>
<br>
<a class="moz-txt-link-freetext" href="http://www.eskimo.com/~bgudgel/IR_0050.jpg">http://www.eskimo.com/~bgudgel/IR_0050.jpg</a><br>
<br>
<a class="moz-txt-link-freetext" href="http://www.eskimo.com/~bgudgel/IR_0094.jpg">http://www.eskimo.com/~bgudgel/IR_0094.jpg</a><br>
<br>
<br>
Here is one with the module open circuit. Note high and low
temperatures are around 44 C.<br>
<br>
<a class="moz-txt-link-freetext" href="http://www.eskimo.com/~bgudgel/IR_0030.jpg">http://www.eskimo.com/~bgudgel/IR_0030.jpg</a><br>
<br>
<br>
<br>
On 9/14/2014 8:51 AM, Bill Hoffer wrote:<br>
</div>
<blockquote
cite="mid:h2f7v5700gvjg9hfqwvqu4o0.1410709909442@email.android.com"
type="cite">
<div>
<div>Bill</div>
<div><br>
</div>
<div>Flir E40, works well and has some good features that make
it easy to write reports with the software. E60 is similar
with additional features, but a little more expensive. IMHO
any of the E - series is a pretty good bet. </div>
<div>Bill</div>
<div><br>
</div>
<div><font style="color:#333333"><i>Sent from my Verizon
Wireless 4G LTE DROID</i></font></div>
</div>
<br>
<br>
Bill Loesch <a class="moz-txt-link-rfc2396E" href="mailto:solar1online@charter.net"><solar1online@charter.net></a> wrote:<br>
<br>
<div class="moz-cite-prefix"><br>
Bill<br>
<br>
What kind of thermal camera are you using for this kind of
inspection? Satisfied? Comments?<br>
<br>
Thanks,<br>
<pre class="moz-signature" cols="72">Bill Loesch
Solar 1 - Saint Louis Solar
314 631 1094</pre>
On 10-Sep-14 11:04 PM, Bill Hoffer wrote:<br>
</div>
<blockquote
cite="mid:CAL4SeayJgPJBw5+zO_xF6bmqQ9XYKb=Ve4sb9ORjd+-CZdqhZA@mail.gmail.com"
type="cite">
<div dir="ltr">Mark
<div><br>
</div>
<div>Loaded modules will have hotter cells. I know this from
searching for bad cells with a thermal camera. At open
circuit I could not see a difference, but short circuit or
loaded I could see 20 - 30 C increase in mismatched cells .</div>
<div><br>
</div>
<div>Bill </div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Wed, Sep 10, 2014 at 9:43 PM, Mark
Frye <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:markf@berkeleysolar.com" target="_blank">markf@berkeleysolar.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">Folks,<br>
<br>
Two identical PV modules are mount in an identical fashion
and exposed to identical irradiance.<br>
<br>
One module is open circuit. The other is connected to a
load and producing power.<br>
<br>
Is there a difference in the temperature of the two
modules? If so, which one is cooler?<br>
<br>
Mark Frye<br>
Berkeley Solar Electric Systems<br>
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-- <br>
<div dir="ltr">
<div>William Hoffer <br>
</div>
161 SE Fourth Ave<br>
<div>P.O. Box 1823<br>
White Salmon, WA 98672-1823<br>
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href="mailto:bhoffer@sunergyengineeringservices.com"
target="_blank">sunengser@gmail.com</a><br>
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