<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>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><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>----- "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></body></html>