[RE-wrenches] Pathfinder vs. Suneye

[Christopher Warfel]

I have written an Excel spreadsheet that will do this.  All you need to 
do is enter the data for the weather station that you are referencing  
and the shading for each hour of the month (copy paste works fast)

email me at BIRenewables at entech-engineering.com with Spreadsheet in the 
subject line and I'll send it out.

Chris





On 10/29/2014 1:48 AM, William Miller wrote:
>
> Dana:
>
> You can evaluate multiple points with a Pathfinder, thusly:
>
> 1.In case you were not aware, the little numbers in between the hours 
> add up to 100% over a day.
>
> 2.Create a spreadsheet with all of the numbers present.  Make it mimic 
> the layout on the Pathfinder.
>
> 3.For any given sample, you delete all of the numbers that correspond 
> to shading.  This is easily done by viewing the image of the 
> pathfinder and lassoing and deleting the shaded numbers until the 
> spreadsheet looks like the Pathfinder.
>
> 4.The remainder is the sun exposure percentage for the month.
>
> 5.You take shading analysis samples at all of the points you desire.
>
> 6.You calculate each point separately and then average the results for 
> the different points on a month-by-month basis.
>
> 7.See example spreadsheet below for one point with no shading.
>
> Like any worthwhile project, this takes some time to set up, but it is 
> then pretty effortless to use.  There is no cost for this 
> do=it-yourself approach.
>
> William
>
> Example:
>
> (Note the rows in the Pathfinder are not in chronological order. Your 
> formulae will compensate for that.)
>
> Gradient Cap_mini
> Lic 773985
> millersolar.com <http://www.millersolar.com/>
> 805-438-5600
>
> *From:*RE-wrenches [mailto:re-wrenches-bounces at lists.re-wrenches.org] 
> *On Behalf Of *Dana Brandt
> *Sent:* Tuesday, October 28, 2014 2:20 PM
> *To:* RE-wrenches
> *Subject:* [RE-wrenches] Pathfinder vs. Suneye
>
> Hi Wrenches,
>
> 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?
>
> So I bought a Suneye. Their software can apparently calculate string 
> shading including multiple solar access readings.
>
> 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?
>
> Thanks,
>
> Dana
>
> Dana Brandt
>
>
>
> _______________________________________________
> List sponsored by Redwood Alliance
>
> 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
>
> List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html
>
> List rules & etiquette:
> www.re-wrenches.org/etiquette.htm
>
> Check out or update participant bios:
> www.members.re-wrenches.org
>

-- 
Christopher Warfel, President
ENTECH Engineering, Inc.
PO Box 871, Block Island, RI 02807
401-466-8978

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20141029/77de2d90/attachment-0002.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: iajaccbg.png
Type: image/png
Size: 62717 bytes
Desc: not available
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20141029/77de2d90/attachment-0015.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: jcbbgaej.png
Type: image/png
Size: 80811 bytes
Desc: not available
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20141029/77de2d90/attachment-0016.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: image/png
Size: 27893 bytes
Desc: not available
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20141029/77de2d90/attachment-0017.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: image/jpeg
Size: 1560 bytes
Desc: not available
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20141029/77de2d90/attachment-0002.jpe>