<html><head><style type='text/css'>p { margin: 0; }</style></head><body><div style='font-family: Times New Roman; font-size: 12pt; color: #000000'><P>Thanks Tump... I'll play with the setpoints.</P>
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<P>On the x-fer switch, I was assuming that the built in X-fer would be used to switch the inverter critical loads to the AC1 (main panel). My suggestion was to add a second upstream to power these loads from the genny should there be an inverter failure AND a power outage. Just an option.<BR><BR></P>
<DIV>For a brighter energy future,<BR><BR>Geoff Greenfield<BR>Founder and CEO<BR><FONT size=4><STRONG>Third Sun Solar & Wind Power Ltd.<BR></STRONG></FONT>340 West State Street, Unit 25<BR>Athens, OH 45701<BR><BR>740.597.3111 Fax 740.597.1548<BR>www.Third-Sun.com<BR><BR><EM><FONT size=4>Clean Energy - Expertly Installed<BR></FONT></EM><BR><BR><BR><BR></DIV><BR><BR>----- "Tump" <tump@hughes.net> wrote: <BR>>
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<DIV><SPAN class=968373415-25112008><FONT face=Arial color=#0000ff size=2>The XW would have the inverter by-pass breakers assembly if you installed it w/ the conduit box, so the second transfer switch is not necessary. </FONT></SPAN></DIV>
<DIV><SPAN class=968373415-25112008></SPAN><SPAN class=968373415-25112008><FONT face=Arial color=#0000ff size=2>Reset your gen AC "transfer" cycles to their minimum as well as your generator low voltage parameters to 110 volts (IF it is a quality gen set & it produces a constant 120V), you should see no more lag transferring off the gen.Make sure you reset the settings in ALL the VFXs.</FONT></SPAN></DIV>
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<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>> <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>Geoff Greenfield<BR>> <B>Sent:</B> Tuesday, November 25, 2008 9:39 AM<BR>> <B>To:</B> RE-wrenches<BR>> <B>Subject:</B> Re: [RE-wrenches] Integrating with a whole house generator<BR>> </FONT></DIV>
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<P>It all depends on the homeowners expectations (and what THEY think is a reasonable critical load). Your scheme looks like it would work - (I might include a second X-fer switch to run the inverter supported loads off the genny if the grid AND the inverter are out).</P>
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<P>Second issue is transfer speed and power drop out. I am not sure of the XW, but I have found that outback is a very quick and clean switch (no computer/com drops) from grid to backup... like a UPS. However... it is NOT as smooth when turning off the genny on back up mode. Lights all fade as genny coughs off and inverter kicks back over to batts. I always make sure customer computer has a deadicated UPS.<BR>> </P>
<DIV>For a brighter energy future,<BR>> Geoff Greenfield<BR>> Founder and CEO<BR>> <FONT size=4><STRONG>Third Sun Solar & Wind Power Ltd.<BR>> </STRONG></FONT>340 West State Street, Unit 25<BR>> Athens, OH 45701<BR>> 740.597.3111 Fax 740.597.1548<BR>> www.Third-Sun.com<BR>> <EM><FONT size=4>Clean Energy - Expertly Installed<BR>> </FONT></EM><BR>> </DIV><BR>> ----- "William Miller" <wrmiller@charter.net> wrote: <BR>> > Friends:<BR>> > I am bidding an installation in which the customer owns a whole house <BR>> > generator. The generator is 30 KVA and we will be installing a 4.5 or 6.0 <BR>> > KVA XW system. Obviously, the inverter will not power the entire <BR>> > house. If we segregate the non-critical loads and connect them to a <BR>> > grid-fed panel, the generator will not power them. If we let the generator <BR>> > run every time there is an outage, this negates the need for a inverter <BR>> > system. What to do?<BR>> > The transfer switch sends a two wire start signal to the generator upon a <BR>> > grid outage. After the transfer switch senses generator voltage, it <BR>> > effects a transfer.<BR>> > My brainstorm is to intercept that two wire start signal. I will connect <BR>> > it instead to the XW inverter. We will segregate the loads, feeding the <BR>> > critical loads from the XW and the Non-critical loads from the output of <BR>> > the transfer switch. In the case of a grid outage, the critical loads will <BR>> > receive uninterrupted power. The Non-critical loads will not have power <BR>> > unless the generator is started by the XW. Once the XW (or the home owner) <BR>> > starts the generator, the transfer will occur. We will put a control panel <BR>> > in the house so the home-owner can start the generator if the No-critical <BR>> > loads are needed.<BR>> > This seems clever to me, but I am biased. Am I missing something???<BR>> > William Miller<BR>> > _______________________________________________<BR>> > List sponsored by Home Power magazine<BR>> > List Address: RE-wrenches@lists.re-wrenches.org<BR>> > Options & settings:<BR>> > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org<BR>> > List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org<BR>> > List rules & etiquette:<BR>> > www.re-wrenches.org/etiquette.htm<BR>> > Check out participant bios:<BR>> > www.members.re-wrenches.org</DIV></BLOCKQUOTE><BR>> _______________________________________________ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org </div></body></html>