Scott, Wrenches We have had systems with the SMA storage but we have used the BYD and have had no problems so far with recharge and operations all as expected, it may be an issue with LG programming and the SMA not communicating properly JUerry
On Fri, Jul 10, 2020 at 2:57 PM <scot.a...@solarcentex.com> wrote: > We have a design with Sunny Storage 6.0 inverter, SB 6.0 PV inverter, the > SMA Automatic Backup Unit, and three LG Resu batteries. Works like a charm > during normal grid ops but when it goes into backup ops, the Sunny Storage > increases frequency to between 60.6 with blips up to 61 hertz, resulting in > the PV inverter throttling back from 5,000+ watts to between 1,300 to 345 > watts. > > > > The result is that the batteries do not recharge from the PV during backup > mode, even when SoC is less than half capacity. This also means the max > power through the ABU to the “whole house backup” is the 6,000 watts from > the Sunny Storage plus the (very) retarded power output of the SB PV > inverter. > > > > SMA tech support just said, “that is normal, the LG Battery is the culprit > and does not charge from PV in this setup.” > > > > I was stunned because why else would I buy this ABU coupling setup…Anybody > have any ideas? I’m hoping the Sunny Storage freq shifting ramp-up > parameters can be adjusted so that PV inverter operations continue when the > battery is at a less than full SoC. > > > > > _______________________________________________ > List sponsored by Redwood Alliance > > 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 > > List-Archive: > http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > >
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