<html>
<body>
<font size=3>Brian:<br><br>
We reviewed the installation instructions and found them lacking in a few
regards:<br><br>
1. The Xantrex system allows for bypass of the inverters only with
external devices and they do not allow choosing between inverter, utility
*or* generator.<br><br>
2. The diagram on page 2-36 shows nine 2 pole breakers. Today I
counted the spaces available for breakers and again this evening via job
photographs, and I see only room for eight 2 pole breakers. I will
check this again tomorrow, but I do not think the Xantrex suggested
breaker arrangement will actually fit.<br><br>
I have been toying with this dilemma. With 5 breakers on the
output, one could contrive to select between utility, generator *or*
inverter for output bypassing. This, unfortunately, leaves
inadequate room for inverter input breakers.<br><br>
I think the ideal scenario would use two Power Distribution Panels.
One would be dedicated to AC and the other to DC (this would be even ore
ideal if the PDP did not cost an unbelievable amount of money). A
power flow diagram of how Xantrex suggests this be wired and also of
another concept I have been developing are on our web site at:
<a href="http://millersolar.com/practices/Technical_Procedures/xw/3XW.html" eudora="autourl">http://millersolar.com/practices/Technical_Procedures/xw/3XW.html<br><br>
</a>Thanks for the input.<br><br>
William Miller<br><br>
<br>
At 10:00 PM 4/28/2009, you wrote:<br>
<blockquote type=cite class=cite cite>Content-Language: en-US<br>
Content-Type: multipart/alternative;<br>
<x-tab> </x-tab>boundary="_000_69FFF3377EEF8747A4FDE2CC20CD1DEDA66442A92DREDEXCHaeesol_"<br><br>
William,<br>
<br>
In the Xantrex \u201cXW Power System Installation Guide\u201d, pages 2-34 to 2-37,
there is a parts list and some diagrams on the wiring of a 3-inverter
system. The parts list calls for two 5 ft (62\u201d hole-to-hole) 4/0 battery
cables to connect the third inverter up to the Distribution Panel.<br>
<br>
Also shown is the use of an external bypass switch to make up for the
lack of enough AC breaker spaces in a single Distribution Panel. It shows
a breaker/interlock panel, but a 2-pole manual transfer switch will also
work. Either way, it should be rated for at least 200A.<br>
<br>
Brian Teitelbaum<br>
AEE Solar<br>
<br>
<br>
<br>
<b>From:</b> re-wrenches-bounces@lists.re-wrenches.org
[<a href="mailto:re-wrenches-bounces@lists.re-wrenches.org" eudora="autourl">mailto:re-wrenches-bounces@lists.re-wrenches.org</a>]
<b>On Behalf Of </b>William Miller<br>
<b>Sent:</b> Tuesday, April 28, 2009 8:49 PM<br>
<b>To:</b> RE-wrenches<br>
<b>Subject:</b> [RE-wrenches] 3 Xantrex XW system<br>
<br>
Friends:<br><br>
We are in the midst of installing our first 3 XW system. Several
questions arose during our work today. I appreciate input any of
you might have.<br><br>
1. Did you find the leads from the Xantrex connection ki long
enough for the third inverter?<br><br>
2. How many AC sources did you connect?<br><br>
3. Did you provide bypass capabilities?<br><br>
4. How did you interlock the bypass capabilities?<br><br>
5. Did you use one or two Power Distribution Panels?<br><br>
6. Can you offer any advice on how best to connect this
equipment?<br><br>
Thanks in advance.<br><br>
William Miller<br>
</font></blockquote></body>
</html>