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<p class="MsoNormal"><span style="color:#1F4E79">Paul,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F4E79"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F4E79">I have used all the inputs which eQuest requires using the cutsheets of inverters and PV module. I am not sure about the tracking volts though.
<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:#1F4E79">The variation of tracking volts significantly changes the electricity generated by the PV system. But still I am far away from the vendors’ calculations.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F4E79"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Thanks,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Pramod<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F4E79"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b>From:</b> Paul Diglio <paul.diglio@sbcglobal.net> <br>
<b>Sent:</b> Monday, September 3, 2018 5:16 PM<br>
<b>To:</b> Pramod .D <d.pramod@setty.com>; equest-users@lists.onebuilding.org<br>
<b>Subject:</b> Re: [Equest-users] PV simulation helioscope vs eQuest<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;font-family:"Helvetica",sans-serif;color:black">I have modeled PV in eQuest and had the same problem. The simulation showed much less than the PV vendor estimated. The actual generation
history confirmed that the vendor's calculations were very close.<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;font-family:"Helvetica",sans-serif;color:black">I have tried the TMY2 and TMY3 files for the area and it made no appreciable difference. I requested all the information eQuest requested
from the vendor and plugged that in, so it is not an input error. I even tried changing the orientation and angle of the PV panels, but could not approach the actual generation.<br>
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<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;font-family:"Helvetica",sans-serif;color:black">Maybe someone else can enlighten us?<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt;background:white"><span style="font-size:12.0pt;font-family:"Helvetica",sans-serif;color:black">Paul Diglio<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><b><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">From:</span></b><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"> Pramod .D via Equest-users <<a href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a>><br>
<b>To:</b> "<a href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a>" <<a href="mailto:equest-users@lists.onebuilding.org">equest-users@lists.onebuilding.org</a>>
<br>
<b>Sent:</b> Monday, September 3, 2018 1:03 AM<br>
<b>Subject:</b> [Equest-users] PV simulation helioscope vs eQuest</span><span style="font-size:12.0pt;font-family:"Helvetica",sans-serif;color:black"><o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;font-family:"Helvetica",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;font-family:"Helvetica",sans-serif;color:black">Dear eQuesters,<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;font-family:"Helvetica",sans-serif;color:black">Recently I have been working on a project where the clients are planning to use the PV modules for electricity generation. I have a Helioscope
simulation report provided by the PV contractor which shows the power generation as 105,300 kWh per year. However, when I use the same details mentioned in the report for my eQuest simulation, I am getting 26,576 kWh. Can anyone please explain the discrepancies
on these reports or am I missing something?<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;font-family:"Helvetica",sans-serif;color:black"> <o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;font-family:"Helvetica",sans-serif;color:black">The PV system used in this project has 4 inverters of capacity 20kW each. Four segments PV models with 33.6kW, 18.6kW 16.8kW and 16.1kW
power generation capacity. Tracking volts of inverters : 244-529 Vac.<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;font-family:"Helvetica",sans-serif;color:black">I really appreciate your time.<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;font-family:"Helvetica",sans-serif;color:#1F497D">Thanks,</span><span style="font-size:12.0pt;font-family:"Helvetica",sans-serif;color:black"><o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><b><span style="font-size:10.5pt;font-family:"Helvetica",sans-serif;color:#C30000">Pramod D. |</span></b><b><span style="font-size:10.5pt;font-family:"Helvetica",sans-serif;color:#7F7F7F"> Mechanical Engineer
</span></b><span style="font-size:12.0pt;font-family:"Helvetica",sans-serif;color:black"><o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><b><span style="font-size:10.5pt;font-family:"Helvetica",sans-serif;color:black"><a href="mailto:d.pramod@setty.com" target="_blank">d.pramod@setty.com</a></span></b><b><span style="font-size:12.0pt;font-family:"Helvetica",sans-serif;color:#212121">
</span></b><span style="font-size:12.0pt;font-family:"Helvetica",sans-serif;color:black"><o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;font-family:"Helvetica",sans-serif;color:black"> <o:p></o:p></span></p>
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