Hi Max, Ive thought about this, and have done forced bulk a few times with no change in output.
One thing I haven’t done is to drain the batteries and see if the PV watts increase to fill them. Nobody has suggested the cc is somehow limiting due to a weird failure snd the settings are correct. I’ve never seen this off grid except if it’s overheating, which seems hard to believe at 1000 watts. And given that a few have had similar experiences that turned out to be grid sell amps being to low, it’s the logical next step. I should have an answer within not to long. Thx Jay > On Jul 19, 2021, at 8:42 PM, Mac Lewis <maclew...@gmail.com> wrote: > > > Hi Jay, > > 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. > > 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. > > Of course firmware could be the issue. > > 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: > https://www.outbackpower.com/downloads/documents/appnotes/fndc_field_cal_app_note.pdf > > This calibration is especially important with Lithium drop in batteries. > > Let us know what you find out > > > >> On Mon, Jul 19, 2021 at 8:01 PM Darryl Thayer <darylsol...@gmail.com> wrote: >> Hi Jay, here are my guesses: >> 1) Customer is using all the power (3.5 is not a large array) >> 2) Per William Miller, the batteries are shot. >> 3) combination of 1 &2 >> 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. >> 5) What is the sell voltage? Is it too high? >> I feel insecure in telling you my settings as I look to you as one of the >> top people in the field. >> >>> On Mon, Jul 19, 2021 at 6:25 PM Jay <jay.pe...@gmail.com> wrote: >>> I’ve had someone from application engineering at Outback check the >>> settings. >>> >>> All appear normal and correct. >>> >>> I’m going to be checking the deep setting on grid sell which is most likely >>> the culprit. >>> >>> Thanks for all the advice and I’ll let you all know what find. >>> >>> Jay >>> >>>>> On Jul 19, 2021, at 4:11 PM, Jerry Shafer <jerrysgarag...@gmail.com> >>>>> wrote: >>>>> >>>> >>>> Jay >>>> In Optics RE >>>> Mate 3S verify that the firmware is 1.4.6 >>>> under global charge are all switches "disabled" >>>> in the GS AC Input "Grid", >>>> Charger "Off", >>>> "Grid Tie" set >>>> Offset enable "Yes" >>>> sell is up to you and battery manufacture >>>> Jerry >>>> >>>>> On Sun, Jul 18, 2021 at 1:44 PM jay <jay.pe...@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 >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> _______________________________________________ >>>>> 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 >>>>> >>>> _______________________________________________ >>>> 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 >>>> >>> _______________________________________________ >>> 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 >>> >> _______________________________________________ >> 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 >> > > > -- > > > > Mac Lewis > > "Yo solo sé que no sé nada." -Sócrates > > _______________________________________________ > 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. 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