<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv=Content-Type content="text/html; charset=us-ascii">
<meta name=Generator content="Microsoft Word 12 (filtered medium)">
<!--[if !mso]>
<style>
v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);}
w\:* {behavior:url(#default#VML);}
.shape {behavior:url(#default#VML);}
</style>
<![endif]-->
<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-top:0in;
margin-right:0in;
margin-bottom:10.0pt;
margin-left:0in;
line-height:115%;
font-size:11.0pt;
font-family:"Calibri","sans-serif";
color:black;}
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;}
p.MsoAcetate, li.MsoAcetate, div.MsoAcetate
{mso-style-priority:99;
mso-style-link:"Balloon Text Char";
margin:0in;
margin-bottom:.0001pt;
font-size:8.0pt;
font-family:"Tahoma","sans-serif";
color:black;}
span.BalloonTextChar
{mso-style-name:"Balloon Text Char";
mso-style-priority:99;
mso-style-link:"Balloon Text";
font-family:"Tahoma","sans-serif";
color:black;}
span.spelle
{mso-style-name:spelle;}
span.EmailStyle20
{mso-style-type:personal;
font-family:"Calibri","sans-serif";
color:#1F497D;}
span.EmailStyle21
{mso-style-type:personal-reply;
font-family:"Calibri","sans-serif";
color:#1F497D;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
-->
</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]-->
</head>
<body bgcolor=white lang=EN-US link=blue vlink=purple>
<div class=WordSection1>
<p class=MsoNormal><span style='color:#1F497D'>No, the FSPC cannot be disabled.
AFRA can, but that is something a little different.<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>The FSPC is the main protection
against overcharging your battery bank with the SI. Without it, the next
protection is the battery charging voltage, which if/when exceeded the SI will disconnect
from all sources as a protection measure.<o:p></o:p></span></p>
<div>
<p class=MsoNormal style='margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal'><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:#1F497D'>SMA America, LLC<o:p></o:p></span></p>
<p class=MsoNormal style='margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal'><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:#1F497D'>Steve Jefferson<o:p></o:p></span></p>
<p class=MsoNormal style='margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal'><i><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:#1F497D'>Sr. Technical Service Specialist, Sunny Family</span></i><span
style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D'><o:p></o:p></span></p>
<p class=MsoNormal style='margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal'><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:#1F497D'>6020 West Oaks Blvd, Suite 300<o:p></o:p></span></p>
<p class=MsoNormal style='margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal'><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:#1F497D'>Rocklin, CA 95765 - 3714<o:p></o:p></span></p>
<p class=MsoNormal style='margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal'><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:#1F497D'>U.S.A.<o:p></o:p></span></p>
<p class=MsoNormal style='margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal'><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:#1F497D'>Tel: +1 916 625 0870<o:p></o:p></span></p>
<p class=MsoNormal style='margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal'><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:#1F497D'>Fax: +1 916 624-2445<o:p></o:p></span></p>
<p class=MsoNormal style='margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal'><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:#1F497D'>Service Line +1 877 697 6283 (Toll Free)<o:p></o:p></span></p>
<p class=MsoNormal style='margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal'><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:#1F497D'>Email: steve.jefferson@sma-america.com<o:p></o:p></span></p>
<p class=MsoNormal style='margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal'><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:#1F497D'><a href="http://www.sma-america.com/">www.SMA-America.com</a><o:p></o:p></span></p>
<p class=MsoNormal style='margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal'><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:#1F497D'> <o:p></o:p></span></p>
<p class=MsoNormal style='margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal'><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:#1F497D'>This email and any attachments thereto may contain SMA America,
LLC confidential, privileged and private material for the sole use of the
intended recipient. Any review, copying, or distribution of this email (or any
attachments thereto) by others is strictly prohibited. If you are not the
intended recipient, please contact the sender immediately and permanently
delete the original and any copies of this email and any attachments thereto.
Thank you.<o:p></o:p></span></p>
</div>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal style='margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal'><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";
color:windowtext'>From:</span></b><span style='font-size:10.0pt;font-family:
"Tahoma","sans-serif";color:windowtext'> Mark Frye
[mailto:markf@berkeleysolar.com] <br>
<b>Sent:</b> Wednesday, April 13, 2011 10:12 AM<br>
<b>To:</b> Steve Jefferson; Gary@IcarusSolarServices.com; 'RE-wrenches'<br>
<b>Subject:</b> RE: [RE-wrenches] AC Coupling Fronius IG Plus 10.0 inverter<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal style='margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal'><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'>Thanks Steve,</span><span style='font-size:12.0pt;font-family:"Times New Roman","serif";
color:windowtext'><o:p></o:p></span></p>
<p class=MsoNormal style='margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal'><span style='font-size:12.0pt;font-family:"Times New Roman","serif";
color:windowtext'> <o:p></o:p></span></p>
<p class=MsoNormal style='margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal'><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:blue'>Isn't it also possible to disable FSPC in the SI so that
the AC coupled inverters can be controlled by a mechanism independent of
the SI?</span><span style='font-size:12.0pt;font-family:"Times New Roman","serif";
color:windowtext'><o:p></o:p></span></p>
<p class=MsoNormal style='margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal'><span style='font-size:12.0pt;font-family:"Times New Roman","serif";
color:windowtext'> <br>
</span><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:windowtext'>Mark Frye</span><span style='font-size:12.0pt;font-family:
"Times New Roman","serif";color:windowtext'> <br>
</span><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:windowtext'>Berkeley Solar Electric Systems</span><span style='font-size:
12.0pt;font-family:"Times New Roman","serif";color:windowtext'> <br>
</span><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:windowtext'>303 Redbud Way</span><span style='font-size:12.0pt;
font-family:"Times New Roman","serif";color:windowtext'> <br>
</span><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:windowtext'>Nevada City, CA 95959</span><span style='font-size:
12.0pt;font-family:"Times New Roman","serif";color:windowtext'> <br>
</span><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:windowtext'>(530) 401-8024</span><span style='font-size:12.0pt;
font-family:"Times New Roman","serif";color:windowtext'> <br>
<a href="http://www.berkeleysolar.com/"><span style='font-size:10.0pt;
font-family:"Arial","sans-serif"'>www.berkeleysolar.com</span></a></span><span
style='font-size:10.0pt;font-family:"Arial","sans-serif";color:windowtext'> </span><span
style='font-size:12.0pt;font-family:"Times New Roman","serif";color:windowtext'>
<o:p></o:p></span></p>
<div>
<p class=MsoNormal style='margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal'><span style='font-size:12.0pt;font-family:"Times New Roman","serif";
color:windowtext'> <o:p></o:p></span></p>
</div>
<p class=MsoNormal style='margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal'><span style='font-size:12.0pt;font-family:"Times New Roman","serif";
color:windowtext'><o:p> </o:p></span></p>
<div class=MsoNormal align=center style='margin-bottom:0in;margin-bottom:.0001pt;
text-align:center;line-height:normal'><span style='font-size:12.0pt;font-family:
"Times New Roman","serif";color:windowtext'>
<hr size=2 width="100%" align=center>
</span></div>
<p class=MsoNormal style='margin-bottom:12.0pt;line-height:normal'><b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext'>
Steve Jefferson [mailto:Steve.Jefferson@sma-america.com] <br>
<b>Sent:</b> Wednesday, April 13, 2011 10:03 AM<br>
<b>To:</b> Gary@IcarusSolarServices.com; RE-wrenches; Mark Frye<br>
<b>Subject:</b> RE: [RE-wrenches] AC Coupling Fronius IG Plus 10.0 inverter</span><span
style='font-size:12.0pt;font-family:"Times New Roman","serif";color:windowtext'><o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>A Fronius Inverter can be AC
coupled with a Sunny Island just fine. The only thing to keep in mind is, that
when the SI starts the FSPC, the Fronius unit will go offline with a Frequency
A/C error. Wait five minutes, then try to reconnect, it will not reconnect
until the SI lowers the FSPC to below 60.5Hz. <o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>I don’t know if Fronius
has an “off-grid” mode, but if so, you could also place the unit in
this mode. It should open the parameters, which will allow for the FSPC to work
correctly. <o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>With FSPC, it is a range of +
2Hz from the nominal system frequency that it will occur in. The nominal
Hz can be adjusted in the SI, but is almost always left at 60Hz<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>IE: Grid fails, SI is generating
a frequency of 60Hz. Batteries are charged, and loads in the protected loads
panel are low. The SI will start the FSPC and raise one Hz to 61Hz, if the load
demand continues to drop the FSPC will continue to rise to 62Hz, thus forcing
the PAC on the Sunny Boy to drop to 0W. Both the FAC-Start-Delta (the point
where the PAC will start to drop), and FAC-Limit-Delta (the range of the PAC
drop) can be adjusted. <o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><img border=0 width=383
height=181 id="Picture_x0020_2" src="cid:image001.png@01CBF9C4.A5D161A0"><o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<div>
<p class=MsoNormal style='margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal'><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:#1F497D'>SMA America, LLC<o:p></o:p></span></p>
<p class=MsoNormal style='margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal'><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:#1F497D'>Steve Jefferson<o:p></o:p></span></p>
<p class=MsoNormal style='margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal'><i><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:#1F497D'>Sr. Technical Service Specialist, Sunny Family</span></i><span
style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D'><o:p></o:p></span></p>
<p class=MsoNormal style='margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal'><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:#1F497D'>Service Line +1 877 697 6283 (Toll Free)<o:p></o:p></span></p>
<p class=MsoNormal style='margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal'><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:#1F497D'>Email: steve.jefferson@sma-america.com<o:p></o:p></span></p>
<p class=MsoNormal style='margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal'><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:#1F497D'> </span><span style='color:#1F497D'><o:p></o:p></span></p>
</div>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal style='margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal'><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";
color:windowtext'>From:</span></b><span style='font-size:10.0pt;font-family:
"Tahoma","sans-serif";color:windowtext'>
re-wrenches-bounces@lists.re-wrenches.org
[mailto:re-wrenches-bounces@lists.re-wrenches.org] <b>On Behalf Of </b>Gary
Willett<br>
<b>Sent:</b> Wednesday, April 13, 2011 3:06 AM<br>
<b>To:</b> Mark Frye<br>
<b>Cc:</b> 'RE-wrenches'<br>
<b>Subject:</b> Re: [RE-wrenches] AC Coupling Fronius IG Plus 10.0 inverter<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal style='margin-bottom:12.0pt'>Thanks Mark for educating me
about FSC.<br>
<br>
Reading SMA docs, FSC allows the Sunny Boy's AC output to be varied from
maximum to zero when the<br>
Sunny Island varies its AC output frequency between 60Hz and 61Hz.<br>
<br>
Based on your response - do you - or any other Wrenches - have any experience
AC coupling the <br>
Fronius inverters? Do they have any problem maintaining connectivity to the
"local" grid <br>
when the big grid is down? Are there any battery-based inverter/chargers that
Fronius does not like?<br>
<br>
I don't want to be on the "bleeding edge" and be the first one to
ever design an AC coupled battery<br>
backup system using Fronius. I will call Fronius support next, but any feedback
from the group will <br>
be much appreciated.<br>
<br>
<span style='font-size:10.0pt;line-height:115%'>Gary Willett, PE<br>
<span class=spelle>Icarus</span> Solar Services LLC</span><o:p></o:p></p>
<p class=MsoNormal><br>
On 4/12/2011 11:37 PM, Mark Frye wrote: <o:p></o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;line-height:115%;font-family:
"Arial","sans-serif";color:blue'>Gary,</span><o:p></o:p></p>
<p class=MsoNormal> <o:p></o:p></p>
<p class=MsoNormal><span style='font-size:10.0pt;line-height:115%;font-family:
"Arial","sans-serif";color:blue'>I have been looking at some AC coupled stuff
lately. The "FSC" is propriatary to SMA, Sunny Island to Sunny
Boy. Pretty much anything else you need something to sense the voltage of
the battery bank so you can open a contactor on the AC line to the Fronius when
the battery voltage gets too high. Once the voltage drops the contactor can
close and bring the Fronius back on line and then the 5-minute start up delay
before it is feeding the line again.</span><o:p></o:p></p>
<p class=MsoNormal><br>
<span style='font-size:10.0pt;line-height:115%;font-family:"Arial","sans-serif"'>Mark
Frye</span> <br>
<span style='font-size:10.0pt;line-height:115%;font-family:"Arial","sans-serif"'>Berkeley
Solar Electric Systems</span> <br>
<span style='font-size:10.0pt;line-height:115%;font-family:"Arial","sans-serif"'>303
Redbud Way</span> <br>
<span style='font-size:10.0pt;line-height:115%;font-family:"Arial","sans-serif"'>Nevada
City, CA 95959</span> <br>
<span style='font-size:10.0pt;line-height:115%;font-family:"Arial","sans-serif"'>(530)
401-8024</span> <br>
<a href="http://www.berkeleysolar.com/"><span style='font-size:10.0pt;
line-height:115%;font-family:"Arial","sans-serif"'>www.berkeleysolar.com</span></a><span
style='font-size:10.0pt;line-height:115%;font-family:"Arial","sans-serif"'> </span>
<o:p></o:p></p>
<div>
<p class=MsoNormal> <o:p></o:p></p>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<div style='margin-bottom:10.0pt'>
<div class=MsoNormal align=center style='margin-bottom:0in;margin-bottom:.0001pt;
text-align:center'>
<hr size=2 width="100%" align=center>
</div>
</div>
<p class=MsoNormal style='margin-bottom:12.0pt'><b><span style='font-size:10.0pt;
line-height:115%;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;line-height:115%;font-family:"Tahoma","sans-serif"'> <a
href="mailto:re-wrenches-bounces@lists.re-wrenches.org">re-wrenches-bounces@lists.re-wrenches.org</a>
[<a href="mailto:re-wrenches-bounces@lists.re-wrenches.org">mailto:re-wrenches-bounces@lists.re-wrenches.org</a>]
<b>On Behalf Of </b>Gary Willett<br>
<b>Sent:</b> Tuesday, April 12, 2011 8:35 PM<br>
<b>To:</b> <a href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</a><br>
<b>Subject:</b> [RE-wrenches] AC Coupling Fronius IG Plus 10.0 inverter</span><o:p></o:p></p>
<p class=MsoNormal style='margin-bottom:0in;margin-bottom:.0001pt'><span
style='font-size:13.5pt;line-height:115%'>Working on a proposal to add battery
backup and a generator to an existing 10kW grid-tie system using the Fronius IG
Plus 10.0 inverter.<br>
<br>
Does anyone have any experience AC coupling this inverter to a Sunny Island
5048, or a Xantrex 6048? Is the Fronius capable of Frequency Shift control
(FSC) that comes from the battery-connected inverter?<br>
<br>
Any other suggested solutions is appreciated.</span><o:p></o:p></p>
<div>
<p class=MsoNormal style='margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal'><span style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p> </o:p></span></p>
<p class=MsoNormal style='margin-bottom:12.0pt;line-height:normal'><span
style='font-size:10.0pt'>Gary Willett, PE<br>
Icarus Solar Services LLC</span><o:p></o:p></p>
</div>
</div>
</body>
</html>