<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 15 (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:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:#0563C1;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:#954F72;
text-decoration:underline;}
p.msonormal0, li.msonormal0, div.msonormal0
{mso-style-name:msonormal;
mso-margin-top-alt:auto;
margin-right:0in;
mso-margin-bottom-alt:auto;
margin-left:0in;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
span.EmailStyle18
{mso-style-type:personal;
font-family:"Calibri",sans-serif;
color:windowtext;}
span.EmailStyle20
{mso-style-type:personal-reply;
font-family:"Calibri",sans-serif;
color:windowtext;}
.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 lang="EN-US" link="#0563C1" vlink="#954F72">
<div class="WordSection1">
<p class="MsoNormal">Howard – Some information related to your questions:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Yes, with AC coupling the output of the Sunny Boy Storage 6.0 (6.0kW) plus PV system is available. For example, 13.7kW with SBS 6.0 at full output and Sunny Boy 7.7 also at full output (obviously daytime). With 3 of the BYD Battery Box
10kWh units, SBS system scales up to slightly more than 30kWh usable storage. Yes, understanding and planning to customers loads is very important and will determine the customer’s happiness with their system. The 50A breaker for PV on the ABU is appropriate
for 40A continuous, or 240Vx40A = 9,600W. The PV can be attached via breaker in protected loads panel downstream, but to ensure the SBS can throttle the PV production rapidly enough when offgrid, there still IS a PV size limit. If considering having more
than 9.6kW of PV, please contact SMA Applications Engineering group. <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">When offgrid, the Sunny Boy Storage uses Frequency Shift Power Control (FSPC, like the Sunny Island). Some newer inverters will have Freq-Watt features enabled, “older” inverters will stop exporting power when frequency goes above 60.5Hz.
Best to check with manufacturer on how any non-SMA inverter will respond – throttle or turn off. The datasheet is showing a Sunny Boy with the hardwire communications as this provides for faster transition/smoother throttling and also supports the zero-export
(grid-tied) use case. For zero export, the SBS cannot adjust frequency and it requires a communication signal to control the PV power. This requires a current Sunny Boy (likely possible with TL-US-22 as well, but I have not seen an example of this).<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Feel free to contact me at <a href="mailto:Training@SMA-America.com">
Training@SMA-America.com</a> for any more information.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Best regards - Mike<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">SMA America<br>
Michael Mahon</span><span style="font-size:9.0pt;font-family:"Arial",sans-serif"><br>
Technical Trainer, Solar Academy<br>
6020 West Oaks Boulevard, Suite 300<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Arial",sans-serif">Rocklin, CA 95765<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Arial",sans-serif">U.S.A.</span><span style="font-size:8.0pt;font-family:"Arial",sans-serif"><br>
</span><span style="font-size:9.0pt;font-family:"Arial",sans-serif">Mobile: +1 916 918 9412<u><br>
<a href="http://www.sma-america.com/"><span style="color:blue">www.SMA-America.com</span></a><o:p></o:p></u></span></p>
<p class="MsoNormal"><u><span style="font-size:9.0pt;font-family:"Arial",sans-serif"><o:p><span style="text-decoration:none"> </span></o:p></span></u></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Arial",sans-serif">Solar Academy:
<a href="http://www.sma-america.com/partners/sma-solar-academy/overview.html"><span style="color:blue">www.SMA-America.com/partners/sma-solar-academy/overview.html</span></a><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Arial",sans-serif">Full training schedule:
<a href="https://www.sma-america.com/partners/sma-solar-academy/seminars/trainings/training/list.html">
<span style="color:blue">https://www.sma-america.com/partners/sma-solar-academy/seminars/trainings/training/list.html</span></a><o:p></o:p></span></p>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b>From:</b> RE-wrenches <re-wrenches-bounces@lists.re-wrenches.org>
<b>On Behalf Of </b>Howard Arey<br>
<b>Sent:</b> Friday, August 9, 2019 12:37 PM<br>
<b>To:</b> 'RE-wrenches' <re-wrenches@lists.re-wrenches.org><br>
<b>Subject:</b> [RE-wrenches] Anyone try the new SMA battery inverter with Automatic Backup Unit? Couple of questions.<o:p></o:p></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Excited to use this and even more excited that one of our sales reps with a SMA system has offered to be our guinea pig!<br>
<br>
The ABU looks great – just got one to the shop today – it has transfer switch with full 200A capability, auto-transformer, easy inputs for BB-inverter, PV inverter, and smart meter with CTs built for smart energy management.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Couple of questions for those that might know, but does the AC coupling of the PV inverter plus the 6.0 BB-inverter mean I might possibly push their combined full output to downstream loads. Even though 200-amp capable ABU, hard to see
how I do whole-house backup. We think we get to “inside the walls backup only” which is good except during middle of summer. A bit more than StorEdge power output.<br>
<br>
Does anyone know the protocol for decreasing the output of the PV inverter when batteries are full? I think it is freq shifting but the diagram does show communication via the home router between the PV inverter and the BB-inverter. I’d think if this was a
necessary communication, then SMA would have insisted on a hard-wire connection. Any ideas on what might be shared and for what purpose.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">This also leads to last question and if freq shifting is the mechanism for throttling back PV inverter output, then I’m thinking that using any brand inverter would work.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Look forward to answers and to sharing more as I put this at the home of our Guinea pig...I means sales rep!<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b>Howard “Scot” Arey<o:p></o:p></b></p>
<p class="MsoNormal">Owner, Solar CenTex<o:p></o:p></p>
<p class="MsoNormal">NABCEP Certified PV Installation Professional<o:p></o:p></p>
<p class="MsoNormal">254-300-1228<o:p></o:p></p>
<p class="MsoNormal"><a href="mailto:scot.arey@solarcentex.com">scot.arey@solarcentex.com</a><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><a href="https://eur02.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.solarcentex.com%2F&data=02%7C01%7Cmichael.mahon%40sma-america.com%7C2037295dc7804d9fbbb708d71d15aa92%7Ca059b96c28294d1188374cc1ff84735d%7C0%7C1%7C637009851219123536&sdata=FxGIfqoFtmVagy75G2Xftc4EgagEqSsBRepeodZjaO0%3D&reserved=0">www.solarcentex.com</a><o:p></o:p></p>
<p class="MsoNormal" style="margin-bottom:12.0pt"><a href="https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.facebook.com%2FSolarCentex&data=02%7C01%7Cmichael.mahon%40sma-america.com%7C2037295dc7804d9fbbb708d71d15aa92%7Ca059b96c28294d1188374cc1ff84735d%7C0%7C0%7C637009851219133529&sdata=vW1YaZJlp56RMdYdF%2BXWiQmrpxhA%2FLcbBoGQElA7CAM%3D&reserved=0">https://www.facebook.com/SolarCentex</a><o:p></o:p></p>
<p class="MsoNormal"><a href="https://eur02.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.solarreviews.com%2Finstallers%2Fsolar-centex-reviews%2F&data=02%7C01%7Cmichael.mahon%40sma-america.com%7C2037295dc7804d9fbbb708d71d15aa92%7Ca059b96c28294d1188374cc1ff84735d%7C0%7C1%7C637009851219133529&sdata=kpYnNxMsVCETyyZ0gYlvkn7LH%2Bco6MqOgmt6SOp%2BiwQ%3D&reserved=0">Top-Rated
Solar Installer in Texas by Solar Reviews</a><u><span style="color:#0563C1"><o:p></o:p></span></u></p>
<p class="MsoNormal"><img border="0" width="167" height="167" style="width:1.7395in;height:1.7395in" id="Picture_x0020_1" src="cid:image002.png@01D550DE.2C79F6D0" alt="Solar Centex Logo - No Back"><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
</body>
</html>