[RE-wrenches] outback grid tie help

[Jay]

Hi William

No that’s definitely not it. 

Production of a 3.5 kWh array is at max 1 kw, with about .8kw going to the grid

Jay 

> On Jul 18, 2021, at 5:44 PM, William Miller <william at millersolar.com> wrote:
> 
> 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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