And just to muddy the waters a little, 2023 NEC uses AC Connected and DC connected wording in place of coupled. Same concept, new name.
On Sat, Oct 28, 2023 at 5:01 PM Roland - RES via RE-wrenches < re-wrenches@lists.re-wrenches.org> wrote: > Agreed and we'll understand the differences, all of our SMA SI systems > utilize both dc charging and AC coupled charging. > > > Roland Shackelford > > President / Owner > > NABCEP PVIP #091209-162 > > Office 808.775.7410 > > Mobile 808.938.9239 > > Power Solutions for Generations Renewable Energy Services, Inc. > <https://www.renewablenergy.com/> > > " Where there is integrity, there will be trust. Where there is trust, > there will be an atmosphere for success." - Sadhguru > > On Oct 28, 2023, at 10:17 AM, William Miller via RE-wrenches < > re-wrenches@lists.re-wrenches.org> wrote: > > > > Friends: > > > > I am starting to get the impression that there is a diversion on the > understanding of the definition of AC coupling within the industry. I > think this definition needs to be clarified. > > > > Below is a diagram of what I understand is a DC coupled system (I hope > these diagrams come through): > > > > <image003.png> > > > > A battery inverter that receives AC power into an AC input port is *not* > AC coupled. > > > > Here is an AC-coupled system: > > > > <image005.png> > > > > What makes AC-Coupled systems unique are the problems presented by sending > power *backwards* through a battery inverter. This is not how battery > inverters were originally designed to operate. These systems require > careful consideration to avoid battery overcharging. > > > > Do we have consensus on this definition? > > > > William Miller > > > > Miller Solar > > 17395 Oak Road, Atascadero, CA 93422 > > 805-438-5600 > > www.millersolar.com > > CA Lic. 773985 > > > > > _______________________________________________ > 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 > >
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