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<div class="moz-cite-prefix">I've not done a side by side
comparison, but the Pathfinder seems to be slightly conservative,
especially depending on which latitude sheet you are using. I
sometimes switch sheets and try both, when the latitude is close
to falling between (ie 37 deg, and there is 37 to 43 sheet or a 31
to 37 sheet) Checking against actual sun locations at the
solstices, it seems to be close, but I think they would rather err
on the side of caution.<br>
I've used the Path finders for decades, and find them ideal for
discussing shading issues on site with the customer, as every one
can look at it at the same time. <br>
For more complicated shading analysis, I can see the Suneye being
more useful. Depending on the situation, I could see using both,
but the Pathfinder is better for off grid, as we don't have
accurate insolation values at these remote locations, so detailed
analysis has limited value anyway. We're primarily looking at
which trees need to be trimmed.<br>
<pre class="moz-signature" cols="72">R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760</pre>
On 10/28/2014 3:19 PM, Dana Brandt wrote:<br>
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cite="mid:CAEo4MB2uq9VyxgZHiq3nr4t=D2ZAoU5Dai_-eXJdO=m4S5eQ9A@mail.gmail.com"
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<div>Hi Wrenches,<br>
<br>
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We've been using the Pathfinder along with the Pathfinder
Assistant software for several years and mostly like it. My
concern with it is there's no way to combine two or three
shading images to account for a string of modules spanning
those different shading conditions. I've spoken with the
Pathfinder folks and they don't seem to understand or
acknowledge that limitation. How have you dealt with this?<br>
<br>
</div>
<div>So I bought a Suneye. Their software can apparently
calculate string shading including multiple solar access
readings. <br>
<br>
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<div>I took both the Pathfinder and the Suneye out on my next
site assessment and have run the results of side by side
measurements. The Suneye is showing about 10-15% better
solar access for each measurement that the Pathfinder
Assistant software. I'm concerned to see such different
numbers. Has anyone else done a side by side comparison?
What have you seen?<br>
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Thanks,<br>
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<div dir="ltr">Dana<br>
<br>
Dana Brandt<br>
Ecotech Energy Systems, LLC<br>
<a moz-do-not-send="true"
href="http://www.ecotechenergy.com"
target="_blank">www.ecotechenergy.com</a><br>
<a moz-do-not-send="true"
href="mailto:dana@ecotechenergy.com"
target="_blank">dana@ecotechenergy.com</a><br>
360.318.7646</div>
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