<div dir="auto">Hi Jay. We had a similar situation arise once after we updated the firmware of a 4048 radian. The inverter was a circa 2015 unit. After updating it would only sell about 1/4 of the normal array output to the grid. <div dir="auto">We talked to Chris at tech support and he had us go into the installer menu and look up the max sell current and somehow the inverter firmware update had changed a setting deep in the installer menu to limit sell amps. It was a menu which we had never been in. Adjusting to the normal 16a of sell current up from the 4A immediately corrected the issue. </div><div dir="auto">Your problem sounds exactly like the one we experienced. </div><div dir="auto">Did you update firmware recently?</div><div dir="auto">I believe you have to be on site to access the installer menu....</div><div dir="auto">Chris is typically on the job at 6am pacific time and easy to get ahold of early....I recommend trying to get ahold of him to walk you thru the steps. </div><div dir="auto">Best of luck.</div><div dir="auto">Kirpal </div><div dir="auto">Oregon Solarworks </div><div dir="auto"><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, Jul 18, 2021, 12:26 PM jay <<a href="mailto:jay.peltz@gmail.com" target="_blank" rel="noreferrer">jay.peltz@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;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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