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<DIV><FONT face=Arial>Wrenches</FONT></DIV>
<DIV><FONT face=Arial>I was looking at the Global Spec newsletter in my inbox
before I deleted it when a picture of a kW hr meter caught my eye. I followed
the link to </FONT><FONT face=Arial><A
href="http://www.enetics.com/">http://www.enetics.com/</A> to see what
their PowerNode Recorders were all about. </FONT></DIV>
<DIV><FONT face=Arial>After an inquiry to Enetics support staff , a quick
reply told me two things:</FONT></DIV>
<OL>
<LI><FONT face=Arial>This PowerNode Recorder would do a dandy job of
short or long term monitoring a utility source, hz, V and A, at
the customers utility-grade meter (see below)</FONT></LI>
<LI><FONT face=Arial>I cannot justify the price quite yet</FONT></LI></OL>
<DIV><FONT face=Arial>Maybe if we all chipped in....</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>Jim Duncan<BR>North Texas Renewable Energy
Inc<BR>817.917.0527<BR><A
href="mailto:ntrei@earthlink.net">ntrei@earthlink.net</A><BR><A
href="http://www.ntrei.com">www.ntrei.com</A> </FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV>
<DIV><SPAN class=168174921-27012009><FONT face=Arial color=#0000ff size=2>Hello
Jim,</FONT></SPAN></DIV>
<DIV><SPAN class=168174921-27012009><FONT face=Arial color=#0000ff size=2>We
recently installed a PowerNode for exactly that application. The homeowner
has 2 inverters, plus grid power of course.</FONT></SPAN></DIV>
<DIV><SPAN class=168174921-27012009><FONT face=Arial color=#0000ff size=2>The
meter recorder has 4 voltage channels and 4 current channels; so we run Grid L1
to channel 1, Grid L2 to channel 2, Inverter 1 to channel 3, and Inverter 2 to
channel 4. The PV inverters are 240 volt, so we route one wire through the
channel CT in the '+' direction and the other PV wire through the same CT in the
opposite or '-' direction. This gives us the TOTAL PV current (and
therefore kW) for both legs of the PV. All of these channels are recorded,
stored, and registered separately.</FONT></SPAN></DIV>
<DIV><SPAN class=168174921-27012009><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=168174921-27012009><FONT face=Arial color=#0000ff size=2>Our
reports are all in MS Excel format so the homeowner just gets his net meter
values numerically in Excel.</FONT></SPAN></DIV>
<DIV><SPAN class=168174921-27012009><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=168174921-27012009><FONT face=Arial color=#0000ff size=2>If you
wanted to see live net metered values in the meter, again, we just route the
load wires through the Grid Cts so that the PV nets out against the Grid.
Everything is sychronous because the PVs are phase-locked to the
grid.</FONT></SPAN></DIV>
<DIV><SPAN class=168174921-27012009><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=168174921-27012009><FONT face=Arial color=#0000ff size=2>Hope
this helps. Let me know if I can answer anything else.</FONT></SPAN></DIV>
<DIV><SPAN class=168174921-27012009><FONT face=Arial color=#0000ff
size=2>Regards,</FONT></SPAN></DIV>
<DIV><SPAN class=168174921-27012009><FONT face=Arial color=#0000ff size=2>Bill
Bush</FONT></SPAN></DIV>
<DIV><SPAN class=168174921-27012009><FONT face=Arial color=#0000ff
size=2>585-924-5010</FONT></SPAN></DIV>
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<DIV></DIV>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left><FONT
face=Tahoma size=2>-----Original Message-----<BR><B>From:</B> North Texas
Renewable Energy Inc [mailto:ntrei@earthlink.net] <BR><B>Sent:</B> Tuesday,
January 27, 2009 4:04 PM<BR><B>To:</B> support@enetics.com<BR><B>Subject:</B>
PowerNode Recorders<BR><BR></FONT></DIV>
<DIV><FONT face=Tahoma><STRONG>After looking at the PowerNode Recorders on the
Globalspec www site, I have a question.</STRONG></FONT></DIV>
<DIV><FONT face=Tahoma><STRONG>Say I install a grid interactive solar PV
system on a customers home and the 120/240 AC output side of the inverter
feeds through a customer owned form S2 meter then onto the utility service
entrance thru the main breaker and back onto the grid. </STRONG></FONT></DIV>
<DIV><FONT face=Tahoma><STRONG>Can the PowerNode Recorder distinguish between
inverter generated power being backfed and utility power feeding inbound?
</STRONG></FONT><FONT face=Tahoma><STRONG>Does the instrument record those
different inflow and outflow on separate registers?</STRONG></FONT></DIV>
<DIV><FONT face=Tahoma><STRONG>Thanks</STRONG></FONT></DIV>
<DIV><FONT face=Arial><FONT face=Tahoma><STRONG>Jim Duncan<BR>North Texas
Renewable Energy Inc<BR>817.917.0527<BR></STRONG></FONT><A href=""><FONT
face=Tahoma><STRONG>ntrei@earthlink.net</STRONG></FONT></A><BR><A
href=""><FONT face=Tahoma><STRONG>www.ntrei.com</STRONG></FONT></A>
</FONT></DIV></BLOCKQUOTE></DIV>
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