Hello Wrenches, I received a response from SMA about this:
The newest line of Sunny Boys (SBX.XUS-40) can be used in backup systems, as long as the Country Standard is set to IslandMode60Hz and the firmware is at least 2.03.01.R. I plan on trying to look deeper into DC coupling with selling with the Sunny Island. That seems like its the way to go if it works well. Does anyone have field experience with DC coupling a Sunny Island and backfeeding with the MNSI comm box and Midnite cc's? The communication box has worked well in off-grid mode, but I remember talking with a Midnite tech support rep who implied that it wasn't great for backfeed. Thanks On Mon, Feb 18, 2019 at 8:52 AM Tump <t...@swnl.net> wrote: > Mac having installed quite a few of these and having the SMA SIs installed > and operating in my home, ( back up & off grid/ GT) please feel free to > contact me off list. I would strongly concur w/ Bradly w/ his suggesting > you utilize the dc coupling. Tump > > On Feb 18, 2019, at 8:19 AM, Mac Lewis <maclew...@gmail.com> wrote: > > Hello Wrenches,, > > We have been asked to take an SMA Sunny Island System that is off-grid, > and convert it to a backup system (Quad stack). Currently, this is a DC > coupled system using Midnite charge controllers. We would like to add SMA > grid-tied inverters to backfeed excess power. I have located this document: > https://files.sma.de/dl/7910/SB-OffGrid-TI-US-en-19.pdf > > According to this document, there really isn't Sunny Boy inverters > available that can function as a backup for a system like this. Is this > true? > Do you know of any distributors that may have stock of the SB XXXXTLUS-12 > line of inverters that would work for this. > > Thanks for your assistance > > -- > > > > Mac Lewis > > *"Yo solo sé que no sé nada." -Sócrates* > _______________________________________________ > 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 > > > *t...@swnl.net* *www.SWNL.net* > Solarwinds Northernlights > * Serving Mid Coast Maine & Northern California* > * 207-832-7574 Cl. > 610-517-8401 * > *Blair "TUMP" May* > > > * ******** MAINE'S CHARTER ******** * * > NABCEP "Certified PV Installer"* > > > * ******** MAINE'S CHARTER ******** ** > Trace Xantrex "Certified" Dealer / Installer"* > > > > _______________________________________________ > 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 > > -- Mac Lewis *"Yo solo sé que no sé nada." -Sócrates*
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