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 _______________________________________________ List sponsored by Redwood Alliance Pay optional member dues here: http://re-wrenches.org List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org There are two list archives for searching. When one doesn't work, try the other: https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: http://www.re-wrenches.org/etiquette.htm Check out or update participant bios: http://www.members.re-wrenches.org
