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<font size=3>Mark:<br><br>
I think I have this problem licked. See last drawing on
<a href="http://millersolar.com/practices/Technical_Procedures/xw/3XW.html" eudora="autourl">http://millersolar.com/practices/Technical_Procedures/xw/3XW.html</a>
We will be using two outboard load centers for utility and generator
feeds to the inverters. This leaves the on-board AC rail open for
my new, full feature bypass assembly. We will need a custom slide
plate which we can machine out of aluminum, or, do you think Xantrex
might want to go into production with this?<br><br>
As you recall, you and I discussed the fact that the utility is hesitant
to allow the use of an XW system with a generator component. After
several iterations, they finally accepted our design package for
processing. I hope it passes review.<br><br>
I'd like to talk with you about this. I will call you. I am
posting to the Wrenches in case others are curious about this solution,
or, maybe they can discover a flaw in the design and save me from
myself.<br><br>
<br>
Thanks,<br><br>
William Miller<br><br>
PS: Thanks also for being very helpful to me on a number of
occasions. I think you are a real asset to Xantrex.<br><br>
Wm<br><br>
<br><br>
At 03:30 PM 4/29/2009, you wrote:<br>
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Hi William, Brian<br>
<br>
There was a change made to the XW Distribution Panel to accommodate nine
2-pole breakers for 3 inverter installations, as the original version was
with 8 slots only. Unfortunately the original 8 breaker capacity version
is still working its way through the inventory in the field – so we do
have a kit with the new front panel we can provide to use with 3 unit
systems.<br>
<br>
Please contact me off list if you want to set that up.<br>
<br>
Cheers,<br>
<br>
Mark<br>
<br>
<br>
Mark Edmunds, P.Eng<br>
Director New Product Development<br>
Xantrex Technology Inc.<br>
mark.edmunds@xantrex.com<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 11:43 PM<br>
<b>To:</b> RE-wrenches<br>
<b>Subject:</b> Re: [RE-wrenches] 3 Xantrex XW system<br>
<br>
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">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><br>
Content-Language: en-US<br>
Content-Type: multipart/alternative;<br>
boundary="_000_69FFF3377EEF8747A4FDE2CC20CD1DEDA66442A92DREDEXCHaeesol_"<br><br>
William,<br>
<br>
In the Xantrex “XW Power System Installation Guide”, 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” 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">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>
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Voice :805-438-5600 Fax:
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