The 48v to 12v DC converter approach should be immune from the inverters LBCO since it lives on the battery side of the inverter/bus. I’ve done a few systems using Tigo’s without issue. The main concern is you now have a DC load attached to the battery output lacking DC load protection that could potentially consume the little bit of battery capacity you had reserved below the programmed inverter LBCO. This possibly could require a black start effort by a homeowner or technician if there were severe clouds for an extended period. It’s not been a problem for me yet, I typically leave my LBCO for most of my Blue Ion sites at 48.4vdc.
I wasn’t aware of the Mean-well converters and had been forced to source them from Bezos unfortunately. Nick > On Feb 21, 2024, at 5:43 AM, Howie Michaelson via RE-wrenches > <re-wrenches@lists.re-wrenches.org> wrote: > > With the Sol-Ark (or other DC coupled inverter/charge controller combinations > such as the Envy), will the system pass through solar power if the inverter > has turned off on LBCO? If not, then these alternative methods for powering > the RSD signal generators won't make a difference, correct? > And does anyone know about the built in signal generator in the Envy (or > others?) continue to work if the inverter has shut down on LBCO? If not, > wouldn't using the built in signal generators cause a significant headache in > those circumstances? > Howie Michaelson > > > On Tue, Feb 20, 2024 at 12:42 PM Sam Haraldson via RE-wrenches > <re-wrenches@lists.re-wrenches.org > <mailto:re-wrenches@lists.re-wrenches.org>> wrote: > What I recommended while at AEE was to use a 48VDC to 12VDC converter to > power the Tigo and APS transmitters. This works well. Here's the one I > recommended if it's still available: mean-well/ddr30l12 > <https://www.onlinecomponents.com/mean-well/ddr30l12-50161036.html> I > never had any negative feedback using this with a Sol-Ark and APS devices. > > We have two recent installations employing a similar solution. If it's > helpful I've attached a couple photos showing the converter and transmitter > that pair nicely with the suggested one-lines shared by Bradley. This is > from a Sol-Ark/Fortress eVault installation with AP Smart RSD. > > Cheers, > Sam > _______________________________________________ > List sponsored by Redwood Alliance > > Pay optional member dues here: http://re-wrenches.org > <http://re-wrenches.org/> > > List Address: RE-wrenches@lists.re-wrenches.org > <mailto:RE-wrenches@lists.re-wrenches.org> > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > <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/ > <https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/> > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org> > > List rules & etiquette: > http://www.re-wrenches.org/etiquette.htm > <http://www.re-wrenches.org/etiquette.htm> > > Check out or update participant bios: > http://www.members.re-wrenches.org <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 >
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