<div dir="ltr"><div><br></div><div>Anyone have any experience with the SMA Sunny Boy Storage for this application? Li+ compatible, HVDC bus, black-start capable... looks like no generator input though. I wonder how well it works when AC coupled with with non-SMA inverters.</div><div><br></div><br clear="all"><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div dir="ltr"><div><br></div><div><div dir="ltr" style="font-family:arial,sans-serif;font-size:12.8px"><b style="font-size:10pt;font-family:ArialMT,serif,EmojiFont;color:rgb(64,64,64)">Regards, </b><br></div><div dir="ltr" style="font-family:arial,sans-serif;font-size:12.8px"><b style="font-size:10pt;font-family:ArialMT,serif,EmojiFont;color:rgb(64,64,64)"><br></b></div><div dir="ltr" style="font-family:arial,sans-serif;font-size:12.8px"><br></div><table cellpadding="0" cellspacing="0" style="border-collapse:collapse;color:rgb(68,68,68);width:400px;font-size:9pt;font-family:Arial,sans-serif;line-height:normal"><tbody><tr><td style="font-family:arial,sans-serif;padding:0px 0px 6px;font-size:12pt;color:rgb(23,147,206);width:259px"><font face="Tahoma, sans-serif"><b>Andrew Truitt</b></font><span style="font-family:Arial,sans-serif"> <table cellpadding="0" cellspacing="0" style="color:rgb(68,68,68);font-size:9pt;border-collapse:collapse;width:400px;line-height:normal"><tbody><tr><td colspan="2" width="400" style="font-family:Arial,sans-serif;padding:0px;font-size:10pt;color:rgb(44,44,44);width:400px"><div style="color:rgb(136,136,136);font-family:arial,sans-serif;font-size:12.8px"><span style="color:rgb(68,68,68)"><span style="font-family:verdana,sans-serif">www.dr.ventures</span></span></div><span style="font-family:arial,sans-serif;font-size:12.8px;color:rgb(68,68,68)"><span style="font-family:verdana,sans-serif">d: 202.486.7507</span></span><span style="font-family:Tahoma,sans-serif"><br></span></td></tr><tr><td colspan="2" width="400" style="font-family:Arial,sans-serif;padding:0px;font-size:10pt;color:rgb(44,44,44);width:400px"><div style="color:rgb(0,0,0);font-family:Calibri,Helvetica,sans-serif,Helvetica,EmojiFont,"Apple Color Emoji","Segoe UI Emoji",NotoColorEmoji,"Segoe UI Symbol","Android Emoji",EmojiSymbols,Helvetica,EmojiFont,"Apple Color Emoji","Segoe UI Emoji",NotoColorEmoji,"Segoe UI Symbol","Android Emoji",EmojiSymbols,Helvetica,EmojiFont,"Apple Color Emoji","Segoe UI Emoji",NotoColorEmoji,"Segoe UI Symbol","Android Emoji",EmojiSymbols,Helvetica,EmojiFont,"Apple Color Emoji","Segoe UI Emoji",NotoColorEmoji;font-size:16px;margin:0px"><br></div><div style="color:rgb(0,0,0);font-family:Calibri,Helvetica,sans-serif,Helvetica,EmojiFont,"Apple Color Emoji","Segoe UI Emoji",NotoColorEmoji,"Segoe UI Symbol","Android Emoji",EmojiSymbols,Helvetica,EmojiFont,"Apple Color Emoji","Segoe UI Emoji",NotoColorEmoji,"Segoe UI Symbol","Android Emoji",EmojiSymbols,Helvetica,EmojiFont,"Apple Color Emoji","Segoe UI Emoji",NotoColorEmoji,"Segoe UI Symbol","Android Emoji",EmojiSymbols,Helvetica,EmojiFont,"Apple Color Emoji","Segoe UI Emoji",NotoColorEmoji;font-size:16px;margin:0px"><div style="margin:0px"><span style="color:rgb(153,153,153);font-family:Arial,sans-serif,serif,EmojiFont;font-size:10pt">NABCEP Certified PV Installation Professional ID: 032407-66</span><br></div><div style="margin:0px"><div style="margin:0px"><div style="margin:0px"><font face="Arial,sans-serif,serif,EmojiFont" size="1" color="#500050"><span style="font-size:12.78px"><font face="Arial,sans-serif,serif,EmojiFont" size="2" color="#999999"><span style="font-size:10pt">Colorado Journeyman Electrician License No.: 600132</span></font></span></font></div><div style="margin:0px"><font face="Arial,sans-serif,serif,EmojiFont" size="1" color="#500050"><span style="font-size:12.78px"><font face="Arial,sans-serif,serif,EmojiFont" size="2" color="#999999"><span style="font-size:10pt"><br></span></font></span></font></div></div></div></div></td></tr></tbody></table></span></td><td style="padding:0px 0px 6px;width:141px;text-align:right"><img border="0" alt="Logo" src="https://s8.postimg.cc/vbfqwedet/DRV_-_1920.png" width="200" height="83" class="gmail-CToWUd" style="border: 0px; vertical-align: middle;"></td></tr><tr><td colspan="2" width="400" style="padding:0px;width:400px;border-top:1px solid rgb(23,147,206)"> <br></td></tr><tr><td colspan="2" width="400" style="padding:0px;font-size:10pt;width:400px"><div style="color:rgb(0,0,0);font-family:Calibri,Helvetica,sans-serif,Helvetica,EmojiFont,"Apple Color Emoji","Segoe UI Emoji",NotoColorEmoji,"Segoe UI Symbol","Android Emoji",EmojiSymbols,Helvetica,EmojiFont,"Apple Color Emoji","Segoe UI Emoji",NotoColorEmoji,"Segoe UI Symbol","Android Emoji",EmojiSymbols,Helvetica,EmojiFont,"Apple Color Emoji","Segoe UI Emoji",NotoColorEmoji,"Segoe UI Symbol","Android Emoji",EmojiSymbols,Helvetica,EmojiFont,"Apple Color Emoji","Segoe UI Emoji",NotoColorEmoji;font-size:16px;margin:0px"></div></td></tr></tbody></table></div><div><br></div><div><br></div><br>"Don't get me wrong: I love nuclear energy! It's just that I prefer fusion to fission. And it just so happens that there's an enormous fusion reactor safely banked a few million miles from us. It delivers more than we could ever use in just about 8 minutes. And it's wireless!"<br><br>~William McDonough<br></div></div></div></div><br></div><br><div class="gmail_quote"><div dir="ltr">On Thu, Sep 13, 2018 at 6:21 AM Will White <<a href="mailto:will@solarenergy.org">will@solarenergy.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">I agree with everything Ray has said when you're using a system with lead-acid batteries, however this doesn't apply to lithium-ion. Li batteries don't need multistage charging like LA batteries do so they would be a perfect fit for a retro-fit battery backup system that can only bulk charge. <div><br></div><div>I'd also suggest people check out the Enphase IQ8 system which allows the inverters to operate without the grid with no storage. They should also be able to black start an AC coupled system with no grid unlike other AC coupled designs. I haven't seen it in person but two of my co-workers toured their demo project and it seems to live up to everything Enphase is claiming.</div><div><br></div><div>Thanks,</div><div>Will</div></div><br><div class="gmail_quote"><div dir="ltr">On Wed, Sep 12, 2018 at 8:38 PM Ray <<a href="mailto:ray@solarray.com" target="_blank">ray@solarray.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div text="#000000" bgcolor="#FFFFFF">
<p>I didn't watch the whole thing, but it looked like a standard AC
couple set up with an Outback Radian. My understanding is that
Outback no longer supports AC Coupling, BTW. I would never use
that for an off grid system or for longer outages. In a very
brief explanation, it essentially bypasses any charge controlling
to the batteries, and puts full Array power into the batteries
until a relay (or phase shifting) disconnects the array. No three
stage charging, no taper charging, no float, no temp
compensation. Its like trying to fill a 5 gal bucket with a fire
house, or drive a car with a throttle that's either off or at full
throttle, no in between. The other issue is that if the batteries
get low and the inverter shuts off, the system will not recharge,
and after a couple of weeks the batteries will be sulfated beyond
recovery.<br>
</p>
<p>My guess is that manus that advocated this approach got into
trouble from end users that fried expensive battery banks during
longer outages. I would consider it the equivalent of cheap
backup generators: a great backup system for folks that don't need
it. There are probably thousands of those out there with happy
customers and installers, because its never actually been used for
more than a few hours, and the batteries are properly charged from
the grid 99.8% of the time. <br>
</p>
<pre class="m_-2808997562609717807m_3564208599622342700moz-signature" cols="72">Ray Walters
Remote Solar
303 505-8760</pre>
<div class="m_-2808997562609717807m_3564208599622342700moz-cite-prefix">On 9/12/18 6:11 PM, Ken Schaal wrote:<br>
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