[RE-wrenches] outback grid tie help

[William Miller]

Damaged batteries consuming power?

William Miller
www.millersolar.com

> On Jul 18, 2021, at 12:26 PM, jay <jay.peltz at gmail.com> wrote:
> 
> HI All,
> 
> I”m trying to diagnose the following system I didn’t install.
> 
> 4 year old system grid tie battery back up.
> 
> Radian 4048
> flexmax 80
> 3500 watts PV
> fndc
> it is on opticsRE
> 
> 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.  
> 
> Usually it will sell a bit, then buy a bit then sell and so on.  Grid voltage is very constant at around 246vac. 
> 
> I’ve 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.  
> 
> I have not been to the site, I was just trying to do this all by optics.  But I’m going to have to go.   I think there are 3 possible issues.  
> 
> 1. the customer has always thought the production is low.  And from what I’ve 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. 
> 
> 2.  There is a programing issue.  
> 
> 3. There is a hardware issue.
> 
> 
> If someone wants to look at the site, I have the info and they can log in.  
> Or if they want to provide settings for me to triple check, that would be great
> and 
> if they have any ideas as to why its acting like it is, very much appreciated 
> So far even though tech support has viewed in on Optics and have had some recommendations as to settings, its not fixed the issue.
> 
> thanks in advance,
> 
> jay
> 
> peltz power
> 
> 
> 
> 
> 
> 
> 
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