<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Greetings Vince,<div class=""><br class=""></div><div class="">Yes, this is quite the system, looks (mostly) fun. To elaborate/inquire slightly more on Pieter\u2019s note about the battery bus voltage being high. I\u2019ve done a few dozen Blue Ion jobs myself and multiple times have observed the bus going straight to 55.2vdc absorb voltage after incidents where I had to do a cold start when the battery bank was depleted and the client did not get to adding charge before the system shut down (manual start gennies in the winter). On two of these systems I observed about a minute or more of lag time where the voltage pegs straight to 55.2 before it \u201cself corrects\u201d and drops down to the true battery voltage of around 45 vdc or so. In my instances it was on the Outback\u2019s bus side and this odd behavior with the FM80 though the Blue Ion\u2019s BMU was driving this behavior and the FM80 was just doing what it\u2019s told. In each instance I was just moments away from getting that fun stomach tickle thinking something is extremely wrong but then the voltage quickly drops by a delta of about 10vdc and the glitch disappears, everything back to \u201cnormal\u201d.</div><div class=""><br class=""></div><div class="">Surely you\u2019ve observed this happening in a comfortable SOC somewhere in the middle of being full and still needing a reasonable charge?</div><div class=""><br class=""></div><div class="">If you leave the Radian out of the loop can you observe that the entire DC coupled array going into the Solark acts as it should? </div><div class=""><br class=""></div><div class="">About how much current is going into each BI cabinet when this happens?</div><div class=""><br class=""></div><div class="">Can you reduce PV current enough to test one BI cabinet at a time to rule out that it may be one of the BMU\u2019s stuck at the high voltage I\u2019ve experienced?</div><div class=""><br class=""></div><div class="">Truthfully Blue Planet\u2019s hardware is the last thing I typically suspect but perhaps it\u2019s a BMU. Please let us know what you eventually find. The client is lucky to have you!</div><div class=""><br class=""></div><div class="">Nick</div><div class=""><br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On Jan 19, 2022, at 9:15 PM, Vince McClellan <<a href="mailto:vince@solarenergydesign.com" class="">vince@solarenergydesign.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" class="">Thanks Pieter<div class="">We seem to have the opposite problem from what you are experiencing. Our freq-watt regulation of the Radian inverter by the Sol-Ark inverters seems to be actuated by the DC power from the solar array that is DC connected to the Sol-Ark inverters. It is supposed to be actuated by the SOC of the Blue Ion batteries, but that is inconsistent at best. We can turn the DC power from the solar array on on the master inverter, but when we try using the MPPT channels on the two other inverters it briefly actuates the freq-watt function of the Sol-Ark disconnecting the Radian inverter. </div><div class=""><br clear="all" class=""><div class=""><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr" class=""><div style="font-size:small;color:rgb(80,0,80)" class=""><div class=""><font face="georgia, serif" class="">Vince McClellan</font></div><div class=""><font face="georgia, serif" class="">Energy Design</font></div><div class=""><font face="georgia, serif" class="">NABCEP PV Installation Professional</font></div><div class=""><font face="georgia, serif" class="">p. <a href="tel:(541)%20485-8122" value="+15414858122" style="color:rgb(17,85,204)" target="_blank" class="">(541) 485-8122</a> f. <a href="tel:(541)%20338-8202" value="+15413388202" style="color:rgb(17,85,204)" target="_blank" class="">(541) 338-8202</a></font></div></div><div style="font-size:small;color:rgb(80,0,80)" class=""><img src="https://docs.google.com/uc?export=download&id=1HcXK0FTsJsEFDvKv-POVulmqJD3Ikpz4&revid=0B2VUQDDTFCz_aVNUUUNDRkNRUCtjc1oyZ3JFY2NvNWlJVGpvPQ" width="420" height="79" class=""><br class=""></div><div style="font-size:small;color:rgb(80,0,80)" class=""><span style="font-family:"arial narrow",sans-serif" class="">If you have received this email and are not the intended recipient please delete this email. Copying, or using any part, content, or attachment of this email is strictly prohibited. </span></div></div></div></div><br class=""></div></div><br class=""><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Jan 19, 2022 at 8:20 PM Pieter Huebner <<a href="mailto:pieter@offgridenterprises.org" class="">pieter@offgridenterprises.org</a>> wrote:<br class=""></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div lang="EN-US" class=""><div class="gmail-m_-4520468909860770744WordSection1"><p class="MsoNormal">Vince, For what it is worth:<u class=""></u><u class=""></u></p><p class="MsoNormal">We have also been working on similar issues when using multiple Solark inverters connected in parallel. The issue has been that parallel Solark inverters don't seem to be able to properly regulate the battery charge voltage. Although Solark technical support has been outstanding, and with their help we have diminished the severity but not solved the issue. For the sites that we currently have deployed for the interim we had to resort to turning down the charge voltage set points in order to protect the Lithium batteries. and avoid BMS shutdowns. We have a client with an existing outback system and were planning to expand the existing system using AC bussed Solark 12K inverters with additional battery and solar capacity (the site is 100% off grid, and has evolved into a micro grid), but are now going a different direction. Although we have not yet attempted an AC bussed Solark system, I suspect that the issues you are having are related to the battery voltage regulation problem we have experienced.<u class=""></u><u class=""></u></p><p class="MsoNormal">Pieter<u class=""></u><u class=""></u></p><p class="MsoNormal"><span id="cid:17e75e15a094cff311"><image001.png></span><u class=""></u><u class=""></u></p><p class="MsoNormal"><u class=""></u> <u class=""></u></p><p class="MsoNormal"><u class=""></u> <u class=""></u></p><p class="MsoNormal"><b class="">From:</b> RE-wrenches <<a href="mailto:re-wrenches-bounces@lists.re-wrenches.org" target="_blank" class="">re-wrenches-bounces@lists.re-wrenches.org</a>> <b class="">On Behalf Of </b>Vince McClellan<br class=""><b class="">Sent:</b> Wednesday, January 19, 2022 5:16 PM<br class=""><b class="">To:</b> RE-wrenches <<a href="mailto:RE-wrenches@lists.re-wrenches.org" target="_blank" class="">RE-wrenches@lists.re-wrenches.org</a>><br class=""><b class="">Subject:</b> [RE-wrenches] Sol-Ark AC Coupling Issues<u class=""></u><u class=""></u></p><p class="MsoNormal"><u class=""></u> <u class=""></u></p><div class=""><div class=""><p class="MsoNormal">Is anyone on the list familiar with AC coupling Sol-Ark inverters?<u class=""></u><u class=""></u></p></div><div class=""><p class="MsoNormal"> <u class=""></u><u class=""></u></p></div><div class=""><p class="MsoNormal">We haven't been able to AC couple an existing Outback Radian system to a new system that we built with 3, Sol-Ark 12K inverters and 3, Blue Ion batteries. Each time we have tested the system the Sol-Ark inverters accept the power from the Radian inverter until we turn on the DC power from the new solar array to the Sol-Ark inverters. As soon as there is significant DC power coming from the solar array the Sol-Ark inverters freq-watt turns on for a brief second and disconnects the Radian inverter even when the Blue Ion batteries are below the programmed state of charge threshold. If we don't turn on the DC power from the new solar array the Radian will connect and stay connected. <u class=""></u><u class=""></u></p></div><div class=""><p class="MsoNormal"><u class=""></u> <u class=""></u></p></div><div class=""><p class="MsoNormal">We have been working with Sol-Ark for several months now to get this system to accept the incoming power from the Radian without freq-watt kicking in on the Sol-Ark inverters and disconnecting the Radian inverter. Sol-Ark has sent two software revisions to the Sol-Ark inverters and we are still experiencing the same problem. <u class=""></u><u class=""></u></p></div><div class=""><p class="MsoNormal"><u class=""></u> <u class=""></u></p></div><div class=""><p class="MsoNormal">Can anyone think of what we might be missing and where to direct our troubleshooting efforts next? <u class=""></u><u class=""></u></p></div><div class=""><p class="MsoNormal"><u class=""></u> <u class=""></u></p></div><div class=""><p class="MsoNormal">Thanks, <u class=""></u><u class=""></u></p></div><p class="MsoNormal"><br clear="all" class=""><u class=""></u><u class=""></u></p><div class=""><div class=""><div class=""><div class=""><div class=""><p class="MsoNormal"><span style="font-size:12pt;font-family:Georgia,serif;color:rgb(80,0,80)" class="">Vince McClellan</span><span style="font-size:12pt;color:rgb(80,0,80)" class=""><u class=""></u><u class=""></u></span></p></div><div class=""><p class="MsoNormal"><span style="font-size:12pt;font-family:Georgia,serif;color:rgb(80,0,80)" class="">Energy Design</span><span style="font-size:12pt;color:rgb(80,0,80)" class=""><u class=""></u><u class=""></u></span></p></div><div class=""><p class="MsoNormal"><span style="font-size:12pt;font-family:Georgia,serif;color:rgb(80,0,80)" class="">NABCEP PV Installation Professional</span><span style="font-size:12pt;color:rgb(80,0,80)" class=""><u class=""></u><u class=""></u></span></p></div><div class=""><p class="MsoNormal"><span style="font-size:12pt;font-family:Georgia,serif;color:rgb(80,0,80)" class="">p. <a href="tel:(541)%20485-8122" target="_blank" class=""><span style="color:rgb(17,85,204)" class="">(541) 485-8122</span></a> f. <a href="tel:(541)%20338-8202" target="_blank" class=""><span style="color:rgb(17,85,204)" class="">(541) 338-8202</span></a></span><span style="font-size:12pt;color:rgb(80,0,80)" class=""><u class=""></u><u class=""></u></span></p></div></div><div class=""><p class="MsoNormal"><span style="font-size:12pt;color:rgb(80,0,80)" class=""><img border="0" width="420" height="79" style="width: 4.375in; height: 0.8229in;" id="gmail-m_-4520468909860770744_x0000_i1025" src="https://docs.google.com/uc?export=download&id=1HcXK0FTsJsEFDvKv-POVulmqJD3Ikpz4&revid=0B2VUQDDTFCz_aVNUUUNDRkNRUCtjc1oyZ3JFY2NvNWlJVGpvPQ" class=""><u class=""></u><u class=""></u></span></p></div><div class=""><p class="MsoNormal"><span style="font-size:12pt;font-family:"Arial Narrow",sans-serif;color:rgb(80,0,80)" class="">If you have received this email and are not the intended recipient please delete this email. Copying, or using any part, content, or attachment of this email is strictly prohibited. </span><span style="font-size:12pt;color:rgb(80,0,80)" class=""><u class=""></u><u class=""></u></span></p></div></div></div></div></div></div></div>_______________________________________________<br class="">
List sponsored by Redwood Alliance<br class="">
<br class="">
Pay optional member dues here: <a href="http://re-wrenches.org/" rel="noreferrer" target="_blank" class="">http://re-wrenches.org</a><br class="">
<br class="">
List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org" target="_blank" class="">RE-wrenches@lists.re-wrenches.org</a><br class="">
<br class="">
Change listserver email address & settings:<br class="">
<a href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org" rel="noreferrer" target="_blank" class="">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a><br class="">
<br class="">
There are two list archives for searching. When one doesn't work, try the other:<br class="">
<a href="https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/" rel="noreferrer" target="_blank" class="">https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/</a><br class="">
<a href="http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org" rel="noreferrer" target="_blank" class="">http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org</a><br class="">
<br class="">
List rules & etiquette:<br class="">
<a href="http://www.re-wrenches.org/etiquette.htm" rel="noreferrer" target="_blank" class="">http://www.re-wrenches.org/etiquette.htm</a><br class="">
<br class="">
Check out or update participant bios:<br class="">
<a href="http://www.members.re-wrenches.org/" rel="noreferrer" target="_blank" class="">http://www.members.re-wrenches.org</a><br class="">
<br class="">
</blockquote></div>
_______________________________________________<br class="">List sponsored by Redwood Alliance<br class=""><br class="">Pay optional member dues here: <a href="http://re-wrenches.org" class="">http://re-wrenches.org</a><br class=""><br class="">List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org" class="">RE-wrenches@lists.re-wrenches.org</a><br class=""><br class="">Change listserver email address & settings:<br class=""><a href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org" class="">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a><br class=""><br class="">There are two list archives for searching. When one doesn't work, try the other:<br class="">https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/<br class="">http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org<br class=""><br class="">List rules & etiquette:<br class="">http://www.re-wrenches.org/etiquette.htm<br class=""><br class="">Check out or update participant bios:<br class="">http://www.members.re-wrenches.org<br class=""><br class=""></div></blockquote></div><br class=""></div></body></html>