<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii">
<TITLE>Message</TITLE>
<META content="MSHTML 6.00.2900.5726" name=GENERATOR></HEAD>
<BODY
style="WORD-WRAP: break-word; khtml-nbsp-mode: space; khtml-line-break: after-white-space">
<DIV><SPAN class=515315901-05032009><FONT face=Arial color=#0000ff size=2>yes
the pass thru inverter (grid tie BBOBs) has the anti
islanding software, once that is off line the, the grid inverter tie
inverter that were connected via the pass thru relays, after 5 mins will
reconnect to your pass thru inverter that has the anti island software, and feed
your AC loads.</FONT></SPAN></DIV>
<DIV><SPAN class=515315901-05032009><FONT face=Arial color=#0000ff size=2>No
problems w/ inspector, w/ 8 OBVGFXs coupled to SMA SB & WB
inverters..</FONT></SPAN>
<DIV></DIV><FONT face=Tahoma size=2>-----Original Message-----<BR><B>From:</B>
re-wrenches-bounces@lists.re-wrenches.org
[mailto:re-wrenches-bounces@lists.re-wrenches.org] <B>On Behalf Of
</B>design<BR><B>Sent:</B> Wednesday, March 04, 2009 8:36 PM<BR><B>To:</B>
re-wrenches@lists.re-wrenches.org<BR><B>Subject:</B> [RE-wrenches] AC Coupling,
inverter listings<BR><BR></FONT></DIV>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">Fellow wrenches,
<DIV><BR class=khtml-block-placeholder></DIV>
<DIV><SPAN class=Apple-tab-span style="WHITE-SPACE: pre"></SPAN>I have been
following the AC coupling discussions with interest, and now have a site where
this would make a lot of sense. One question remains that I have not
been able to answer by reading the archives I have found. Since the AC
circuit from the batteryless UI inverter actually passes through the backup
inverter before landing eventually in the main panel, does the backup inverter
have to have the same listings required of UI inverters for interconnection(UL
and IEEE)? For example, in Outback's white paper, they show the backup
inverter as an off grid unit in one drawing, and grid-tie unit in
another. Do both scenarios meet the code, as the generation (PV) is
connected to a listed UI inverter? Have any of you run into trouble with
AHJs when installing these AC coupled systems for battery back up in grid tied
residences?</DIV>
<DIV><BR class=khtml-block-placeholder></DIV>
<DIV>Thanks,</DIV>
<DIV><BR class=khtml-block-placeholder></DIV>
<DIV>
<DIV><SPAN class=Apple-style-span
style="WORD-SPACING: 0px; FONT: 12px Helvetica; TEXT-TRANSFORM: none; COLOR: rgb(0,0,0); TEXT-INDENT: 0px; WHITE-SPACE: normal; LETTER-SPACING: normal; BORDER-COLLAPSE: separate; border-spacing: 0px 0px; khtml-text-decorations-in-effect: none; apple-text-size-adjust: auto; orphans: 2; widows: 2">
<P style="MARGIN: 0px"><FONT style="FONT: 12px Helvetica" face=Helvetica
size=3>Jim Grundy</FONT></P>
<P style="MARGIN: 0px"><FONT style="FONT: 12px Helvetica" face=Helvetica
size=3>NABCEP Certified Solar PV Installer</FONT></P>
<P style="MARGIN: 0px">Vermont Solar Specialist Plumber PS-279</P>
<P style="MARGIN: 0px"><FONT style="FONT: 12px Helvetica" face=Helvetica
size=3>Elemental Energy, Inc.</FONT></P>
<P style="MARGIN: 0px"><FONT style="FONT: 12px Helvetica" face=Helvetica
size=3>1750 Clark Rd</FONT></P>
<P style="MARGIN: 0px"><FONT style="FONT: 12px Helvetica" face=Helvetica
size=3>E. Montpelier, VT<SPAN class=Apple-converted-space> </SPAN><SPAN
class=Apple-converted-space> <SPAN
class=Apple-converted-space> </SPAN></SPAN>05651</FONT></P>
<P style="MARGIN: 0px"><FONT style="FONT: 12px Helvetica" face=Helvetica
size=3>802-476-3441 (p)</FONT></P>
<P style="MARGIN: 0px"><FONT style="FONT: 12px Helvetica" face=Helvetica
size=3>802-476-5680 (f )</FONT></P>
<P style="MARGIN: 0px"><FONT style="FONT: 12px Helvetica" face=Helvetica
size=3>802-272-8933 (c)</FONT></P><BR
class=Apple-interchange-newline></SPAN></DIV><BR></DIV></BLOCKQUOTE></BODY></HTML>