I like data. Not being able to measure AC coupled PV input is far from my ideal in my opinion, but when there is no other practical choice, I guess I would do it. In fact, I have done ita couple of times.
Jason Szumlanski Principal Solar Designer | Florida Solar Design Group NABCEP Certified Solar Professional (PVIP) Florida State Certified Solar Contractor CVC56956 Florida Certified Electrical Contractor EC13013208 On Thu, Aug 14, 2025, 10:48 AM Zeke Yewdall via RE-wrenches < re-wrenches@lists.re-wrenches.org> wrote: > While the AC coupled PV system can be added to the AC backed up loads > panel, this defeats a lot of the functionality of a dedicated AC coupled PV > array input on the AIOs and is not recommended by most of them. In > theory, yes, it works on most inverters to just add it as a negative AC > load -- and I've even AC coupled an old Trace SW, and it works fine on > that, despite being designed and built before AC coupling was thought of. > > But, if it's just on the AC loads output, the inverter does not have the > ability to drop the AC PV array separately from the load if it needs to for > high battery charge regulating, does not have the ability to measure the PV > array input on monitoring, and may have other issues. > > Zeke > > > *Subject:* Re: [RE-wrenches] Adding battery to grid tie > > > > Correct me if I'm wrong: I believe AIOs can accept AC coupled power > > through the load 'output' port. That leaves the Grid and Gen inputs free > > for their roles as labelled. > > > > The AC coupled inverters connect via a breaker in the critical loads > > panel. > > > > > > William Miller > > Miller Solar.com > > 805-438-5600 > > www.millersolar.com > > > > _______________________________________________ > 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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