A minor update here. I had the grid zero DOD volts set to 48, and the low battery cut out was set to 47.2v. But the homeowner told me that their loads cut out at some point. Does anyone know whether it is possible that Outback would be using a temperature compensated voltage for one of those setpoints and a non-temperature compensated voltage for the other one?
Thanks! -Dave On Wed, Apr 24, 2024, 3:33 PM Dave Tedeyan <d...@sungineersolar.com> wrote: > Maverick and Steve, > > Thank you much for pointing me in the right direction here. I was looking > at the Radian setting and not the Mate3S settings. I've decided to use the > flextime schedule to have it go to grid zero mode at night when we will not > be exporting any solar power anyway. It really does not matter in this case > whether the batteries get recharged by the grid or from the AC coupled > solar. > > Cheers, > Dave > > On Tue, Apr 23, 2024 at 5:25 PM Steve Higgins via RE-wrenches < > re-wrenches@lists.re-wrenches.org> wrote: > >> Yes, Grid Zero would work, but the customer wouldn't be selling power to >> the utility. You could program the Radan to sell more power by lowering >> the sell voltage. I would get aggressive with it for at least 20-30 cycles >> to see if you can recover some capacity. Ideally, to recover lost capacity >> from lead batteries, you want to do 50-80% cycling for at least 5-10 >> cycles. >> >> I would be cautious about HBX mode, its issue, and why this mode should >> have died with the old Trace Eng inverters... HBX mode tends to kill >> battery banks if left there too long or you are not getting the battery to >> 100%. The problem with HBX mode is that there is no way to control absorb >> timers, so the batteries get to the 80-85% range but never get to full; if >> the batteries are lead, this is going to create sulfation problems, and if >> AGM will end up in severe swelling. If I remember correctly, you can >> adjust the delay timer for HBX, which should be equal to the programmed >> Absrob timers, but I don't know if they killed this in the new firmware. >> >> >> >> <http://www.rollsbattery.com> <http://www.rollsbattery.com> >> <http://www.rollsbattery.com> <http://www.rollsbattery.com> >> <http://www.rollsbattery.com> <http://www.rollsbattery.com> >> <http://www.rollsbattery.com> <http://www.rollsbattery.com> >> <http://www.rollsbattery.com> <http://www.rollsbattery.com> >> <http://www.rollsbattery.com> <http://www.rollsbattery.com> >> <http://www.rollsbattery.com> <http://www.rollsbattery.com> >> <http://www.rollsbattery.com> <http://www.rollsbattery.com> >> <http://www.rollsbattery.com> <http://www.rollsbattery.com> >> Steve Higgins ⋅ Technical Services Manager >> t +1.902.597.4020 m +1.206.790.5840 >> f +1.902.597.8447 e st...@surrette.com >> <http://www.facebook.com/RollsBattery> >> <https://www.youtube.com/user/RollsBattery> >> <https://www.youtube.com/RollsBatteryEngineering> >> <https://www.youtube.com/RollsBatteryEngineering> >> <https://www.youtube.com/RollsBatteryEngineering> >> <https://www.linkedin.com/company/rolls-battery-engineering> >> <https://www.linkedin.com/company/rolls-battery-engineering> >> <https://www.linkedin.com/company/rolls-battery-engineering> >> <http://www.instagram.com/RollsBattery> >> <http://www.instagram.com/RollsBattery> >> ------------------------------ >> CONFIDENTIALITY: The information transmitted herein is intended only for >> the addressee and may contain confidential, proprietary and/or privileged >> material. Any unauthorized review, distribution or other use of or the >> taking of any action in reliance upon this information is prohibited. If >> you receive this email in error, please contact the sender and delete or >> destroy this message and all copies. >> ------------------------------ >> >> >> On Tue, Apr 23, 2024 at 1:53 PM Maverick Brown via RE-wrenches < >> re-wrenches@lists.re-wrenches.org> wrote: >> >>> You can do it in one of several easy ways. >>> >>> HPX mode on the Mate. High Battery transfer. When the battery voltage >>> and/or SOC is above the setpoint drop the grid. When the battery voltage or >>> state of charge goes below the setpoint pick up the grid. This case the >>> Mate is doing the driving. >>> >>> Also available is Grid Zero mode where the inserter decides to zero the >>> loads based on battery voltage and AC amp load. Then you would set the >>> ReBulk set point on the inverter charger to trigger charging the batteries >>> instead of zero AC loads. >>> >>> The third choice is to program something called FlexTime where you set >>> the schedule of the AC input mode from grid tide to red zero or off grid, >>> etc. >>> >>> It’s the system is on OpticsRE, you can adjust the settings fine-tune to >>> get the best performance out of those Northstar batteries. >>> >>> I just decommissioned a 36 battery group of Northstar batteries after 13 >>> years and most of them are still viable. >>> >>> As a precaution, For AC coupling, I also install a high battery AUX port >>> controlled relay that drops the AC coupling input circuit. >>> >>> Thank you, >>> >>> Maverick >>> >>> Maverick Brown >>> Off-Grid Solar Commander since 2006 >>> Maverick Solar Enterprises, Inc. >>> • Solar Commander Remote Power >>> • SunFlow Systems Cathodic Protection >>> maver...@mavericksolar.com >>> 512-460-9825 >>> >>> >>> >>> On Apr 23, 2024, at 3:36 PM, Dave Tedeyan via RE-wrenches < >>> re-wrenches@lists.re-wrenches.org> wrote: >>> >>> >>> Hi All, >>> >>> I have an AC coupled Radian that is used to back up certain loads when >>> the grid is down. It is paired with the Northstar Blue (Outback) batteries. >>> The system sits in float nearly all the time. During a recent grid outage, >>> the batteries had less than half the capacity that I would have expected, >>> and they are only about 3.5 years old with very few cycles on them. >>> >>> I tried to talk to Outback about it, which seems to not be possible >>> anymore. I did talk to Northstar, and they recommend not leaving the >>> batteries in float all the time. >>> >>> I am wondering if anyone knows of a way to force the Radian to >>> automatically discharge the batteries to a certain voltage ideally once a >>> week, but could do daily. Essentially, I would like to utilize a time of >>> use schedule where I can force the radian to not use the grid and just use >>> the battery to power the loads for a little while. Ideally this would be >>> automatic, and not require the customer to go through the grid breaker >>> every once in a while. It seems that from the manual, I need to keep the >>> Radian in Grid Tie mode in order for it to be able to sell excess PV back >>> to the grid. Any ideas? >>> >>> Thanks! >>> -Dave >>> >>> -- >>> [image: Logo] <https://www.sungineersolar.com/> >>> Dave Tedeyan, P.E. >>> Owner | Sungineer Solar >>> p: he | him | his >>> a: 1653 Slaterville Rd. | Ithaca, NY 14850 >>> w: www.sungineersolar.com <http://www.sungineersolar.com/> >>> c: (607) 270-0370 >>> _______________________________________________ >>> 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 >> >> > > -- > [image: Logo] <https://www.sungineersolar.com/> > Dave Tedeyan, P.E. > Owner | Sungineer Solar > p: he | him | his > a: 1653 Slaterville Rd. | Ithaca, NY 14850 > w: www.sungineersolar.com <http://www.sungineersolar.com/> > c: (607) 270-0370 >
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