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<p class=MsoNormal><i><font size=2 color=navy face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;color:navy;font-style:italic'>Eric,<br>
<br>
In order to connect single phase to three phase you probably need phase sensing
on all three legs in order to disconnect the inverter from legs connected if
one leg fails.<br>
Also, in Ontario under microFIT & FIT we typically have to balance power evenly
across each leg as far as feeding power into grid on three phase.<br>
That is why utility companies basically require three phase inverters on
existing three phase lines such as PowerOne or Fronius.<o:p></o:p></span></font></i></p>
<p class=MsoNormal><i><font size=2 color=navy face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;color:navy;font-style:italic'>If
single phase is only available, you can connect single phase up to 100kW I
believe (after connection impact assessment is done of course)<br>
<br>
Not allowing three phase inverters when three phase is available is a puzzle to
me. Not very cost effective and overcomplicating the system.<br>
<o:p></o:p></span></font></i></p>
<p class=MsoNormal><i><font size=2 color=navy face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;color:navy;font-style:italic'>Thanks.<o:p></o:p></span></font></i></p>
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<p><i><font size=2 color=black face=Calibri><span lang=EN-US style='font-size:
11.0pt;font-family:Calibri;color:black;font-style:italic'>Kind regards,<br>
Wilco Vercoelen<br>
President<o:p></o:p></span></font></i></p>
<p><i><font size=3 color=black face="Times New Roman"><span lang=EN-US
style='font-size:12.0pt;color:black;font-style:italic'><img width=80 height=43
id="_x0000_i1026" src="cid:image001.gif@01CC035C.0B86F410"><b><span
style='font-weight:bold'><br>
</span></b></span></font></i><i><font size=2 color=black face=Calibri><span
lang=EN-US style='font-size:11.0pt;font-family:Calibri;color:black;font-style:
italic'>Dommelvalley Green Power - Solar Energy Solutions<br>
Barrie, Ontario<br>
Canada<br>
<br>
</span></font></i><font size=1 color=black face=Calibri><span style='font-size:
9.0pt;font-family:Calibri;color:black'><o:p></o:p></span></font></p>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span lang=EN-US
style='font-size:10.0pt;font-family:Tahoma;font-weight:bold'>From:</span></font></b><font
size=2 face=Tahoma><span lang=EN-US style='font-size:10.0pt;font-family:Tahoma'>
re-wrenches-bounces@lists.re-wrenches.org
[mailto:re-wrenches-bounces@lists.re-wrenches.org] <b><span style='font-weight:
bold'>On Behalf Of </span></b>Eric Thomas<br>
<b><span style='font-weight:bold'>Sent:</span></b> April-25-11 14:01<br>
<b><span style='font-weight:bold'>To:</span></b>
re-wrenches@lists.re-wrenches.org<br>
<b><span style='font-weight:bold'>Subject:</span></b> [RE-wrenches] Single
phase to three phase interconnect</span></font><span lang=EN-US><o:p></o:p></span></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p><font size=3 face="Times New Roman"><span style='font-size:12.0pt'>While
commercial solar work is newer to me, im surprised this hasn't been addressed
very much in our forum: Interconnecting single phase inverters to three phase
services. We are laying out a 6kW system using Silicon Energy Cascade modules
and Aurora PVI inverters (either 2 or 3 PVI 3.0's). The challenge is finding a
way to easily tie two of these inverters into the existing 3phase service. I've
been reading up on Sunny Boys tech notes and on this forum about imbalance and
such, but im still not comfortable enough with tie in. Due to the string
configuration options, I can add a third inverter and use a three phase
subpanel to aggregate the inverters then tie them in. But adding a third
inverter seems like a goofy solution. In looking at available equipment,
transformers, phase converters etc, I can't seem to find the right fit. Any
ideas?<o:p></o:p></span></font></p>
<p><font size=3 face="Times New Roman"><span style='font-size:12.0pt'>This
system does not have a three phase inverter option due to Made in WA req's. <o:p></o:p></span></font></p>
<p><font size=3 face="Times New Roman"><span style='font-size:12.0pt'>Thanks!<o:p></o:p></span></font></p>
<p><font size=3 face="Times New Roman"><span style='font-size:12.0pt'>Eric
Thomas<br>
Solar Epiphany LLC<o:p></o:p></span></font></p>
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