<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta content="text/html;charset=ISO-8859-1" http-equiv="Content-Type">
</head>
<body bgcolor="#ffffff" text="#000000">
Mark,<br>
Since what I mainly do is small wind related, this thread has me a
little concerened. Is this application receiving AC in a' la
SunnyIsland style, via another grid-tie inverter, or is the battery
being charged via a charge controller? Lacking theSMA technology that
controlls battery voltage and the "sell" function in a little different
way, shouldn't this system be configured in the second manner, that is
charging the batteries through a charge controller and diversion
resistor? If it were set up this way, would you still have this
problem, or is the battery just so small that the voltage falls
precipitously as soon as sell kicks in? I thought that there is a 5
minute wait period prior to connecting to the grid anyhow, so shouldn't
things even out during that hysteresis?<br>
<br>
Is there a configurable setting on the sell function that might allow
some lattitude in the amps going to the grid, or is it pedal to the
metal, regardless? If there is no control over the sell amps, seems to
me that would be a good idea.<br>
<br>
Matt T<br>
<br>
Mark Edmunds wrote:
<blockquote
cite="mid3E67FB71FF853C45B698033F89E4BE24081AD517@xbc-mail1.xantrex.com"
type="cite">
<meta http-equiv="Content-Type" content="text/html; ">
<meta name="Generator" content="Microsoft Word 12 (filtered medium)">
<style>
<!--
/* Font Definitions */
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman","serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
span.EmailStyle17
{mso-style-type:personal-reply;
font-family:"Calibri","sans-serif";
color:#1F497D;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page Section1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.Section1
{page:Section1;}
-->
</style>
<!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
<div class="Section1">
<p class="MsoNormal"><span
style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);">Hi
Wrenches –<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);">Just
to clarify on this a bit… When we designed the XW we were
always assuming there would be some sort of voltage regulation on the
input to
the batteries, either with a PV MPPT controller or a diversion
regulator for
wind and uHydro systems. So hence while the unit does try to regulate
the
battery voltage while selling power to the grid it does take some time
when in
sell mode to make sure everything is stable and compliant with the
UL1741
limits before actually starting to transfer power.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);">With
a typical set up this is just fine, but obviously with a wind
system like this the delay allows the voltage to rise to the point the
inverter
thinks it has a lot of power to sell, and with smaller battery bank
sizes
quickly pulls the voltage back down to the point it stops selling. <o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);">As
mentioned below we think we can speed this start of selling
to the grid when battery voltage rises past the Grid Support Voltage
setting, which
should help smooth out this sort of situation. Initially we will test
this in the
lab and at a few sites to ensure we get good performance, then will
roll
the change into new units. This all may take longer than a few weeks,
but we
will do our best!<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);">Yours
for a windy future…<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);">Mark<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal" style=""><span
style="font-size: 10pt; font-family: "Arial","sans-serif"; color: rgb(31, 73, 125);">Mark
Edmunds</span><span style="color: rgb(31, 73, 125);"><br>
</span><span
style="font-size: 10pt; font-family: "Arial","sans-serif"; color: rgb(31, 73, 125);">Director
Engineering</span><span style="color: rgb(31, 73, 125);"> <br>
</span><span
style="font-size: 10pt; font-family: "Arial","sans-serif"; color: rgb(31, 73, 125);">Residential
Renewable Energy Markets</span><span style="color: rgb(31, 73, 125);"> <br>
</span><span
style="font-size: 10pt; font-family: "Arial","sans-serif"; color: rgb(31, 73, 125);">Xantrex
Technology Inc.</span><span style="color: rgb(31, 73, 125);"> <o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 10pt; font-family: "Arial","sans-serif"; color: rgb(31, 73, 125);">p.
604.422.2609</span><span
style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);">
<br>
</span><span
style="font-size: 10pt; font-family: "Arial","sans-serif"; color: rgb(31, 73, 125);">f.
604.420.1591</span><span
style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);">
<br>
</span><span
style="font-size: 10pt; font-family: "Arial","sans-serif"; color: rgb(31, 73, 125);">E-mail:
<a class="moz-txt-link-abbreviated" href="mailto:mark.edmunds@xantrex.com">mark.edmunds@xantrex.com</a></span><span
style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);">
<br>
</span><span
style="font-size: 10pt; font-family: "Arial","sans-serif"; color: black;"
lang="EN-CA">Website:</span><u><span
style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);"
lang="EN-CA"> </span></u><span
style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);"><a
href="http://www.xantrex.com"><span
style="font-size: 10pt; font-family: "Arial","sans-serif"; color: blue;"
lang="EN-CA">www.xantrex.com</span></a> <br>
<br>
</span><span
style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);"><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);"><o:p> </o:p></span></p>
<div>
<div
style="border-style: solid none none; border-color: rgb(181, 196, 223) -moz-use-text-color -moz-use-text-color; border-width: 1pt medium medium; padding: 3pt 0in 0in;">
<p class="MsoNormal"><b><span
style="font-size: 10pt; font-family: "Tahoma","sans-serif";">From:</span></b><span
style="font-size: 10pt; font-family: "Tahoma","sans-serif";">
<a class="moz-txt-link-abbreviated" href="mailto:re-wrenches-bounces@lists.re-wrenches.org">re-wrenches-bounces@lists.re-wrenches.org</a>
[<a class="moz-txt-link-freetext" href="mailto:re-wrenches-bounces@lists.re-wrenches.org">mailto:re-wrenches-bounces@lists.re-wrenches.org</a>] <b>On Behalf Of </b>Michael
Welch<br>
<b>Sent:</b> Friday, January 16, 2009 1:46 PM<br>
<b>To:</b> <a class="moz-txt-link-abbreviated" href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</a><br>
<b>Subject:</b> [RE-wrenches] XW / Wind problem to be fixed by
firmware update<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Hi gang. Please contact me OFF LIST if you have
any
questions.<br>
<br>
Dan Lennox asked me to post this to the list:<br>
<br>
<br>
<o:p></o:p></p>
<p class="MsoNormal">I have been working with Xantrex customer
support for the
last couple of months, concerning an issue when a XW-6048 inverter is
connected
to a wind turbine and allows alarmingly high battery voltage.<br>
<br>
The inverter Grid Support Volts is set to 55v, and should sell at or
around
this voltage. However I have seen issues where the inverter is not
selling and
allows the battery voltage to get alarmingly high (>60v). It would
have gone
higher (and I have seen 63v) except that my diversion controller kicks
in and
diverts power, stopping the voltage increase.<br>
<br>
This situation occurs typically under low wind conditions and it seemed
to take
about 15 seconds for the inverter to wake up and load the wind
turbine.
When the inverter did 'kick in' it put a 60amp load onto the turbine,
which
caused it to slow down, quickly lowering the battery voltage and the
inverter stops selling - causing the whole cycle to happen over again!<br>
<br>
I just heard from an Xantrex customer support engineer that the XW
inverter
software has a built in 20 second delay (de-bouncing time they called
it) once
the Grid Support Voltage is reached, regardless of how high the voltage
may
get.<br>
<br>
Xantrex has agreed to work on a firmware upgrade that will allow SELL
to occur
when BATTV=GSV+4V and this should be available in a few weeks.<br>
<br>
Dan Lenox<o:p></o:p></p>
</div>
<pre wrap="">
<hr size="4" width="90%">
_______________________________________________
List sponsored by Home Power magazine
List Address: <a class="moz-txt-link-abbreviated" href="mailto:RE-wrenches@lists.re-wrenches.org">RE-wrenches@lists.re-wrenches.org</a>
Options & settings:
<a class="moz-txt-link-freetext" href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a>
List-Archive: <a class="moz-txt-link-freetext" href="http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org">http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org</a>
List rules & etiquette:
<a class="moz-txt-link-abbreviated" href="http://www.re-wrenches.org/etiquette.htm">www.re-wrenches.org/etiquette.htm</a>
Check out participant bios:
<a class="moz-txt-link-abbreviated" href="http://www.members.re-wrenches.org">www.members.re-wrenches.org</a>
</pre>
<pre wrap="">
<hr size="4" width="90%">
No virus found in this incoming message.
Checked by AVG - <a class="moz-txt-link-freetext" href="http://www.avg.com">http://www.avg.com</a>
Version: 8.0.176 / Virus Database: 270.10.8/1898 - Release Date: 1/16/2009 3:09 PM
</pre>
</blockquote>
</body>
</html>