I would consider a 15 cell (3.2 volts per cell) Lithium Iron Phosphate battery such as FNS (UL Listed 15 cell). This puts the LBCO at about 47.6-48.0V or so. A 15 series cell battery puts the voltage in line with the LBCO of the Trace inverter without an auxiliary contactor triggered by the charge controller or another device. EIther way works, but then you don't have to worry about tripping out the low battery at the BMS instead of the inverter. I will say that the Fortress is a nice quick install if you don't have to lift it but the 48V LBCO limit will need to be dealt with in a 16 cell battery.
Let us know what you decide. Cheers On Wed, Jul 13, 2022 at 10:05 AM Jason Szumlanski via RE-wrenches < re-wrenches@lists.re-wrenches.org> wrote: > Ok, Fortress and Simplifi for the two that I was considering. As long as > there are no issues with lack of closed loop communication, it sounds like > those are the way to go. > > Jason Szumlanski > > On Wed, Jul 13, 2022, 11:37 AM Jerry Shafer via RE-wrenches < > re-wrenches@lists.re-wrenches.org> wrote: > >> Fortress Evault max, good form factor, simple >> Jerry >> >> On Wed, Jul 13, 2022, 3:05 AM Jason Szumlanski via RE-wrenches < >> re-wrenches@lists.re-wrenches.org> wrote: >> >>> Any suggestions for LiPO batteries that play nice with the SW5548? This >>> system also has an Outback CC for a pretty small PV array (rating TBD). >>> >>> Based on some pics I received from the client, the current lead acid >>> battery appears to be around 40kWh and was slightly undersized, so I'd be >>> looking for LiPO around 30kWh. >>> >>> Jason Szumlanski >>> Florida Solar Design Group >>> _______________________________________________ >>> 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*
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