<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div dir="ltr">Hi Max,</div><div dir="ltr"><br></div><div dir="ltr">Ive thought about this, and have done forced bulk a few times with no change in output. </div><div dir="ltr"><br></div><div dir="ltr">One thing I haven\u2019t done is to drain the batteries and see if the PV watts increase to fill them. </div><div dir="ltr"><br></div><div dir="ltr">Nobody has suggested the cc is somehow limiting due to a weird failure snd the settings are correct. I\u2019ve never seen this off grid except if it\u2019s overheating, which seems hard to believe at 1000 watts. </div><div dir="ltr"><br></div><div dir="ltr">And given that a few have had similar experiences that turned out to be grid sell amps being to low, it\u2019s the logical next step. </div><div dir="ltr"><br></div><div dir="ltr">I should have an answer within not to long. </div><div dir="ltr"><br></div><div dir="ltr">Thx</div><div dir="ltr">Jay</div><div dir="ltr"><br><blockquote type="cite">On Jul 19, 2021, at 8:42 PM, Mac Lewis <maclewis1@gmail.com> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr">\ufeff<div dir="ltr">Hi Jay,<div><br></div><div>I suspect the grid-tie sell function isn't quite working in the charge controllers (if all strings are working correctly). To test this, you can try to force a bulk charge with the charge controllers. The inverter should try to maintain the sell voltage and you should see the wattage of the array increase (if you do it during peak sun time). You can do the same test by putting the float voltage in the charge controllers a few volts above the sell voltage.</div><div><br></div><div>You can also test the selling function; you could also lower the sell voltage below the current battery bank voltage. This should cause the sell current to increase up to the max sell current parameter until the battery bank voltage lowers to the offset voltage.</div><div><br></div><div>Of course firmware could be the issue.</div><div><br></div><div>One thing that has really helped us to make the Outback products work well is to calibrate all battery voltages across devices. That includes the flexnet DC, which is a process described here: <a href="https://www.outbackpower.com/downloads/documents/appnotes/fndc_field_cal_app_note.pdf">https://www.outbackpower.com/downloads/documents/appnotes/fndc_field_cal_app_note.pdf</a></div><div><br></div><div>This calibration is especially important with Lithium drop in batteries.</div><div> </div><div>Let us know what you find out<br></div><div><br></div><div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Jul 19, 2021 at 8:01 PM Darryl Thayer <<a href="mailto:darylsolar1@gmail.com">darylsolar1@gmail.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 dir="ltr"><div class="gmail_default" style="font-family:"times new roman",serif;font-size:large">Hi Jay, here are my guesses:</div><div class="gmail_default" style="font-family:"times new roman",serif;font-size:large">1) Customer is using all the power (3.5 is not a large array)</div><div class="gmail_default" style="font-family:"times new roman",serif;font-size:large">2) Per William Miller, the batteries are shot. </div><div class="gmail_default" style="font-family:"times new roman",serif;font-size:large">3) combination of 1 &2 </div><div class="gmail_default" style="font-family:"times new roman",serif;font-size:large">4) Bulk voltage is too high, daily trying to go to bulk voltage drives the batteries to the grave. Float voltage is too high, acting as a low charge, holding off sell. The return amps never drop to an acceptable level. </div><div class="gmail_default" style="font-family:"times new roman",serif;font-size:large">5) What is the sell voltage? Is it too high? </div><div class="gmail_default" style="font-family:"times new roman",serif;font-size:large">I feel insecure in telling you my settings as I look to you as one of the top people in the field. </div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Jul 19, 2021 at 6:25 PM Jay <<a href="mailto:jay.peltz@gmail.com" target="_blank">jay.peltz@gmail.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 dir="auto"><div dir="ltr">I\u2019ve had someone from application engineering at Outback check the settings. </div><div dir="ltr"><br></div><div dir="ltr">All appear normal and correct. </div><div dir="ltr"><br></div><div dir="ltr">I\u2019m going to be checking the deep setting on grid sell which is most likely the culprit. </div><div dir="ltr"><br></div><div dir="ltr">Thanks for all the advice and I\u2019ll let you all know what find. </div><div dir="ltr"><br></div><div dir="ltr">Jay</div><div dir="ltr"><br><blockquote type="cite">On Jul 19, 2021, at 4:11 PM, Jerry Shafer <<a href="mailto:jerrysgarage01@gmail.com" target="_blank">jerrysgarage01@gmail.com</a>> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr">\ufeff<div dir="ltr"><div>Jay</div><div>In Optics RE</div><div>Mate 3S verify that the firmware is 1.4.6</div><div>under global charge are all switches "disabled"</div><div>in the GS AC Input "Grid", </div><div>Charger "Off", </div><div>"Grid Tie" set </div><div>Offset enable "Yes"</div><div>sell is up to you and battery manufacture</div><div>Jerry</div><div><br></div><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, Jul 18, 2021 at 1:44 PM jay <<a href="mailto:jay.peltz@gmail.com" target="_blank">jay.peltz@gmail.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">HI All,<br>
<br>
I\u201dm trying to diagnose the following system I didn\u2019t install.<br>
<br>
4 year old system grid tie battery back up.<br>
<br>
Radian 4048<br>
flexmax 80<br>
3500 watts PV<br>
fndc<br>
it is on opticsRE<br>
<br>
The symptoms are that its not selling much at all. Mostly when it is about 1kw max PV production and .8kw selling. I have disconnected the FNDC and after that it did seem to work better. <br>
<br>
Usually it will sell a bit, then buy a bit then sell and so on. Grid voltage is very constant at around 246vac. <br>
<br>
I\u2019ve been through the settings a few times with tech support, made adjustments and for a while it was selling pretty normally, but again today 0 production, CC is at float. <br>
<br>
I have not been to the site, I was just trying to do this all by optics. But I\u2019m going to have to go. I think there are 3 possible issues. <br>
<br>
1. the customer has always thought the production is low. And from what I\u2019ve seen that is true. This is in a very sunny place, no shade so with 3.5kw, 1kw is very low which I think they may have a few strings of the array are not connected. However why that bothers me is that the VOC/VMP voltages are too close in looking at the CC. Which leads me to think its been told to back off to the 1.0kw, by some setting, see #2. And its always around .8 selling and around 1kw output from the array. <br>
<br>
2. There is a programing issue. <br>
<br>
3. There is a hardware issue.<br>
<br>
<br>
If someone wants to look at the site, I have the info and they can log in. <br>
Or if they want to provide settings for me to triple check, that would be great<br>
and <br>
if they have any ideas as to why its acting like it is, very much appreciated <br>
So far even though tech support has viewed in on Optics and have had some recommendations as to settings, its not fixed the issue.<br>
<br>
thanks in advance,<br>
<br>
jay<br>
<br>
peltz power<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
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</blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail_signature"><div><br></div><div><font color="#305A78" face="'times new roman', serif"><br></font></div><div><br></div>Mac Lewis<br><br><span style="font-family:"Times New Roman";font-size:medium;color:rgb(255,153,0)"><b><font face="Arial, Helvetica, sans-serif" size="3"><p align="left"><font color="#000000" face="Verdana, Arial, Helvetica, sans-serif"><span style="font-size:small"><span style="font-family:arial;font-weight:normal;color:rgb(48,90,120)"><font face="'times new roman', serif">"Yo solo sé que no sé nada." </font><span style="font-weight:700;color:rgb(104,104,104)"><font face="'times new roman', serif">-Sócrates</font></span></span></span></font></p></font></b></span></div>
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