Hi Brad, I have heard that the selling from the Midnite charge controllers doesn't work real well. There is a MNSI comm box so it may be the best way (certainly the cheapest). Does anyone have experience with this scenario, good or bad?
Thanks for your input as always On Mon, Feb 18, 2019 at 8:27 AM Bradley Bassett <bbasse...@gmail.com> wrote: > I think you can leave it DC coupled and enable grid tie in the Sunny > Island inverters. It might not be quite as efficient but a lot more cost > effective. If you don't already have it Midnite makes a comm box that makes > the Classic look like an SMA device. That might be helpful to coordinate > MPPT and grid tie. > > Brad > > On Mon, Feb 18, 2019 at 5:19 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 >> >> _______________________________________________ > 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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