<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii">
<TITLE>Message</TITLE>
<META content="MSHTML 6.00.2900.5659" name=GENERATOR></HEAD>
<BODY text=#000000 bgColor=#ffffff>
<DIV><SPAN class=718182213-26112008><FONT face=Arial color=#0000ff size=2>Matt,
I have long been interested in installing the SMA SI & SBs but I have a VERY
tough time selling $9ks worth of inverters, just to get things
started.</FONT></SPAN></DIV>
<DIV><SPAN class=718182213-26112008><FONT face=Arial color=#0000ff size=2>In the
system below I would not of hesitated in installing the SMA SI & SB! I too
agree that w/this type of scenario described below, I would have given
quite a bit of thought to using the SMAs. Can't beat the battery charging, no
charge controllers & expandability.</FONT></SPAN></DIV>
<DIV><SPAN class=718182213-26112008></SPAN><SPAN class=718182213-26112008><FONT
face=Arial color=#0000ff size=2> Please if there is someone out there that
has had experience w/ the SMA SI & SB let us know if it is all that it is
cracked up to be!</FONT></SPAN></DIV>
<DIV><SPAN class=718182213-26112008><FONT face=Arial color=#0000ff size=2>With
passport in hand, I offer my help if someone out there has a
large system like this, that will be using the SI & SB/WB type of
set up.</FONT></SPAN></DIV>
<DIV><SPAN class=718182213-26112008><FONT face=Arial color=#0000ff
size=2>TUMP</FONT></SPAN></DIV>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV></DIV>
<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>Matt
Tritt<BR><B>Sent:</B> Tuesday, November 25, 2008 9:21 PM<BR><B>To:</B>
RE-wrenches<BR><B>Subject:</B> Re: [RE-wrenches] More on AC
coupling<BR><BR></FONT></DIV>I am curious as to why OutBacks were used for
this system instead of using SunnyIslands and SunnyBoys? From what I can tell
about the SI system, virtually no aspect of battery charging, auto
gen-start/stop, and interactive inverter control has been overlooked - or
remains to be engineered in the field by the installer. Because SunnyIslands
have the ability to "talk" to Sunny (or Windy)Boys, excess energy is taken
care of by "integrated load shedding" - no need for multiple relays, dumpoads
and voltage sensors. :-) The only limitation to these systems (and only in 60
Hz land) is a maximum of 20 kW single, and 15 kW three phase per autonomous
load. I really like the flexibility of being able to connect all AC inputs on
the same line, as well as having the option to do direct battery charging from
a DC source (as long as you use a shunt to measure current).<BR><BR>I know
this doesn't answer your questions, but for similar applications in the future
it would be good to take a close look at the SunnyIsland system. They're
cool.<BR><BR><BR><BR>Matt T<BR><BR>Mark Dickson wrote:
<BLOCKQUOTE cite=mid1227629891_11368@gwa5 type="cite">
<META content="Microsoft Word 11 (filtered medium)" name=Generator>
<STYLE>
<!--
/* Font Definitions */
@font-face
{font-family:"Comic Sans MS";
panose-1:3 15 7 2 3 3 2 2 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman";}
a:link, span.MsoHyperlink
{color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{color:purple;
text-decoration:underline;}
span.EmailStyle17
{mso-style-type:personal-compose;
font-family:Arial;
color:navy;
font-weight:normal;
font-style:normal;
text-decoration:none none;}
@page Section1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.Section1
{page:Section1;}
/* List Definitions */
@list l0
{mso-list-id:1187984249;
mso-list-type:hybrid;
mso-list-template-ids:-1443051090 67698689 67698691 67698693 67698689 67698691 67698693 67698689 67698691 67698693;}
@list l0:level1
{mso-level-number-format:bullet;
mso-level-text:\F0B7;
mso-level-tab-stop:.5in;
mso-level-number-position:left;
text-indent:-.25in;
font-family:Symbol;}
@list l0:level2
{mso-level-number-format:bullet;
mso-level-text:o;
mso-level-tab-stop:1.0in;
mso-level-number-position:left;
text-indent:-.25in;
font-family:"Courier New";}
@list l0:level3
{mso-level-tab-stop:1.5in;
mso-level-number-position:left;
text-indent:-.25in;}
@list l0:level4
{mso-level-tab-stop:2.0in;
mso-level-number-position:left;
text-indent:-.25in;}
@list l0:level5
{mso-level-tab-stop:2.5in;
mso-level-number-position:left;
text-indent:-.25in;}
@list l0:level6
{mso-level-tab-stop:3.0in;
mso-level-number-position:left;
text-indent:-.25in;}
@list l0:level7
{mso-level-tab-stop:3.5in;
mso-level-number-position:left;
text-indent:-.25in;}
@list l0:level8
{mso-level-tab-stop:4.0in;
mso-level-number-position:left;
text-indent:-.25in;}
@list l0:level9
{mso-level-tab-stop:4.5in;
mso-level-number-position:left;
text-indent:-.25in;}
ol
{margin-bottom:0in;}
ul
{margin-bottom:0in;}
-->
</STYLE>
<DIV class=Section1>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Hello
Wrenches,<O:P></O:P></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">On the heels of the
previous thread:<O:P></O:P></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">We just got
finished installing a system that utilizes an Outback Quad stack and a 5.2kW
array coupled to the AC panel via a Fronius IG5100--due to a long
home-run. The VFX’s are wired into the home in their traditional
manner, providing the “grid” for the Fronius. As the solar comes in,
excess power not used in the home back feeds the batteries through the
VFX’s. I have a series of relays operating dump loads and finally a
power cut-off for when the batteries reach critical level. We
installed the system yesterday and turned it on for a test run (then back
off to power it up in 2009 for the ITC’s)—it worked
great!<O:P></O:P></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><O:P></O:P></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">I have a couple
questions for you all:<O:P></O:P></SPAN></FONT></P>
<UL style="MARGIN-TOP: 0in" type=disc>
<LI class=MsoNormal style="COLOR: navy"><FONT face=Arial color=navy
size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Seems how we are
back feeding the inverters and forfeiting their charge control, where
would you set the dump loads to kick on?</SPAN></FONT> <FONT face=Arial
size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><O:P></O:P></SPAN></FONT>
<UL style="MARGIN-TOP: 0in" type=circle>
<LI class=MsoNormal style="COLOR: navy"><FONT face=Arial color=navy
size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">For now I have
them set at: 1<SUP>st</SUP> load to kick on at float voltages,
2<SUP>nd</SUP> to kick on at bulk voltages and 3<SUP>rd</SUP> to kick
the solar power off at the EQ voltages. Does this make
sense? The bank is made up of Rolls 4ks-25ps
batteries.</SPAN></FONT> <FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><O:P></O:P></SPAN></FONT></LI></UL>
<LI class=MsoNormal style="COLOR: navy"><FONT face=Arial color=navy
size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Following a
recent discussion on the Wrenches list with a similar system: Do I
need to worry about back feeding the generator if it is runnin in the
morning when the sun comes up? Do I need a relay that will shut it
down when solar comes on line?</SPAN></FONT> <FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><O:P></O:P></SPAN></FONT>
<LI class=MsoNormal style="COLOR: navy"><FONT face=Arial color=navy
size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">I plan on setting
the Absorb and Float set times to a miimum. Would you recommend
this?</SPAN></FONT> <FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><O:P></O:P></SPAN></FONT></LI></UL>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><O:P></O:P></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Thanks for your
input!<O:P></O:P></SPAN></FONT></P>
<DIV>
<DIV>
<DIV>
<P class=MsoNormal><FONT face="Comic Sans MS" color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: 'Comic Sans MS'"><O:P></O:P></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Comic Sans MS" color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: 'Comic Sans MS'">Mark
Dickson</SPAN></FONT><FONT color=navy><SPAN
style="COLOR: navy"><O:P></O:P></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Comic Sans MS" color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: 'Comic Sans MS'">Oasis
Montana Inc.</SPAN></FONT><FONT color=navy><SPAN
style="COLOR: navy"><O:P></O:P></SPAN></FONT></P></DIV></DIV></DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"><O:P></O:P></SPAN></FONT></P></DIV><PRE wrap=""><HR width="90%" SIZE=4>
_______________________________________________
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 width="90%" SIZE=4>
Internal Virus Database is out of date.
Checked by AVG - <A class=moz-txt-link-freetext href="http://www.avg.com">http://www.avg.com</A>
Version: 8.0.175 / Virus Database: 270.9.4/1794 - Release Date: 11/17/2008 8:48 AM
</PRE></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>