<div dir="ltr">Hi Jeff<div>Here's the skinny on your questions. </div><div><br></div><div><span style="color:rgb(0,0,0)">1) you are using the Radian only as an AC Grid-Tie inverter - no batteries on it?</span></div><div><span style="color:rgb(0,0,0)"><i>The Radian inverter has a bank of AGM Lead Acid Batteries on it. </i></span></div><div><span style="color:rgb(0,0,0)">2) that you are aware that the AC Coupled wattage plus the DC wattage on the Sol-Ark's MPPTs must be within the total allowed for solar generation</span></div><div><span style="color:rgb(0,0,0)"><i>Yes, we are aware of the limits of the inverters. </i></span></div><div><span style="color:rgb(0,0,0)">3) that you have the AC Coupled output of the Radian connected to the GEN breaker of the Sol-Ark</span></div><div><i>This is the weird part of this system. Because of the client's needs/wants we are treating the Radian inverter as the grid and it is tied into the grid breaker on the Sol-Arks. Lesson learned here is never let the client drive the design. </i><br style="color:rgb(0,0,0)"><span style="color:rgb(0,0,0)">4) that you have the software set for the GEN breaker to be AC Coupled and have checked all other software items with Sol-Ark needed for AC coupling</span></div><div><span style="color:rgb(0,0,0)"><i>We have the Sol-Arks set as AC coupled, but on the</i> grid breaker. <i>We cleared this design with Sol-Ark tech support by sending them the schematic before moving ahead with the design. They didn't see any issue with the design before we built it. </i></span></div><div><span style="color:rgb(0,0,0)"><i><br></i></span></div><div><font color="#000000"><i>Please see the as-built schematic attached to the previous email. </i></font></div><div><font color="#000000"><i><br></i></font></div><div><font color="#000000"><i><br></i></font></div><div><font color="#000000"><i>Thanks for looking this over. I feel like there must be something that we and Sol-Ark are missing. </i></font></div><div><font color="#000000"><br></font></div><div><font color="#000000"><br></font></div><div><font color="#000000"><br clear="all"></font><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div style="font-size:small;color:rgb(80,0,80)"><div><font face="georgia, serif">Vince McClellan</font></div><div><font face="georgia, serif">Energy Design</font></div><div><font face="georgia, serif">NABCEP PV Installation Professional</font></div><div><font face="georgia, serif">p. <a href="tel:(541)%20485-8122" value="+15414858122" style="color:rgb(17,85,204)" target="_blank">(541) 485-8122</a> f. <a href="tel:(541)%20338-8202" value="+15413388202" style="color:rgb(17,85,204)" target="_blank">(541) 338-8202</a></font></div></div><div style="font-size:small;color:rgb(80,0,80)"><img src="https://docs.google.com/uc?export=download&id=1HcXK0FTsJsEFDvKv-POVulmqJD3Ikpz4&revid=0B2VUQDDTFCz_aVNUUUNDRkNRUCtjc1oyZ3JFY2NvNWlJVGpvPQ" width="420" height="79"><br></div><div style="font-size:small;color:rgb(80,0,80)"><span style="font-family:"arial narrow",sans-serif">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></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Jan 19, 2022 at 7:05 PM Jeff Clearwater <<a href="mailto:jeffc@villagepowerdesign.com">jeffc@villagepowerdesign.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div style="color:rgb(0,0,0)">Yes what Jay
said - need a block diagram
with available power flows on this one. If you've been working with
Sol-Ark you probably covered the basics but just for the rest of us to
be assured:<br>
<br>
I assume:<br>
<br>
1) you are using the Radian only as an AC Grid-Tie inverter - no
batteries on it?<br>
2) that you are aware that the AC Coupled wattage plus the DC wattage on
the Sol-Ark's MPPTs must be within the total allowed for solar
generation<br>
3) that you have the AC Coupled output of the Radian connected to the
GEN breaker of the Sol-Ark <br>
4) that you have the software set for the GEN breaker to be AC Coupled
and have checked all other software items with Sol-Ark needed for AC
coupling<br>
<br>
just as a starting base for us to understand what may be happening.<br>
<br>
And some of the techs at Sol-Ark are in training - have you talked to
the tech lead, Dustin Douglas? He's the official Sol-Ark rep on this
list but I just saw him at InterSolar and he said he has been just too
busy to chime in here much. I'm scheduled to speak with him soon - I'll
see if he can find the time if he hasn't already talked to you.<br>
<br>
<br>
Best,<br>
<br>
Jeff<br>
<br>
<br>
<span></span>
<blockquote type="cite" style="border:0px none"><div style="margin:30px 25px 10px"><div style="width:100%;border-top:2px solid rgba(146,154,163,0.7);padding-top:10px"> <div style="display:inline-block;white-space:nowrap;vertical-align:middle;width:49%">
<a style="padding-right:6px;font-weight:500;color:rgb(72,86,100);text-decoration:none" href="mailto:vince@solarenergydesign.com" target="_blank">Vince McClellan</a></div> <div style="display:inline-block;white-space:nowrap;vertical-align:middle;width:48%;text-align:right"> <font color="#909AA4"><span style="padding-left:6px">January
19, 2022 at 3:15 PM</span></font></div> </div></div>
<div style="color:rgb(144,154,164);margin-left:24px;margin-right:24px">
<div dir="ltr"><div>Is anyone on the list familiar with AC coupling Sol-Ark
inverters?</div><div> </div><div>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. </div><div><br></div><div>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. </div><div><br></div><div>Can anyone
think of what we might be missing and where to direct our
troubleshooting efforts next? </div><div><br></div><div>Thanks, </div><br clear="all"><div><div dir="ltr"><div dir="ltr"><div style="font-size:small;color:rgb(80,0,80)"><div><font face="georgia,
serif">Vince McClellan</font></div><div><font face="georgia, serif">Energy
Design</font></div><div><font face="georgia, serif">NABCEP PV
Installation Professional</font></div><div><font face="georgia, serif">p. <a href="tel:%28541%29%20485-8122" value="+15414858122" style="color:rgb(17,85,204)" target="_blank">(541)
485-8122</a> f. <a href="tel:%28541%29%20338-8202" value="+15413388202" style="color:rgb(17,85,204)" target="_blank">(541) 338-8202</a></font></div></div><div style="font-size:small;color:rgb(80,0,80)"><img src="https://docs.google.com/uc?export=download&id=1HcXK0FTsJsEFDvKv-POVulmqJD3Ikpz4&revid=0B2VUQDDTFCz_aVNUUUNDRkNRUCtjc1oyZ3JFY2NvNWlJVGpvPQ" height="79" width="420"><br></div><div style="font-size:small;color:rgb(80,0,80)"><span style="font-family:"arial narrow",sans-serif">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></div>
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