Yeah I’ve given up trying to correct people on that one.
> On Aug 9, 2025, at 11:26 AM, Foxfire Energy via RE-wrenches > <[email protected]> wrote: > > Umm, just an FYI, I actually got dinged for labeling the AC output panel from > a battery backup inverter as "Critical Loads".. Critical loads (Critical > Branch circuits) are defined in article 100 of the NEC as circuits associated > with Patient Care.. AC loads from battery backup inverters are more > appropriately defined as "Dedicated Loads".. > Maybe someone could correct me here, but I'm under the impression most > garden-variety inverters are not rated for Critical Load applications. > db > From: RE-wrenches <[email protected]> on behalf of > William Miller via RE-wrenches <[email protected]> > Sent: Saturday, August 9, 2025 1:03 PM > To: RE-wrenches <[email protected]> > Cc: William Miller <[email protected]> > 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 <http://www.millersolar.com/> > > > On Sat, Aug 9, 2025 at 9:50 AM david quattro via RE-wrenches > <[email protected] > <mailto:[email protected]>> wrote: > True. if you want to do grid, gen, and AC Couple then you need a transfer > switch or contactor. > Likewise I haven’t touched a Powerwall, nor an Enphase battery. > > > > On Sat, Aug 9, 2025 at 9:36 AM jay via RE-wrenches > <[email protected] > <mailto:[email protected]>> wrote: > One big issue with the AIO’s is that you can’t do grid, generator and ac > coupling to the best of my understanding > > I do like the idea of just removing the old GT inverter and stuffing that > into the AIO, elegant > > yes its my understanding that Tesla won’t accept generator. While many are > pissed off at eg4, I won’t touch tesla. > > and FYI you can buy the same inverter at Fortress. > > thanks everyone. > > jay > > > >> On Aug 9, 2025, at 10:28 AM, Tyrone Houck via RE-wrenches >> <[email protected] >> <mailto:[email protected]>> wrote: >> >> Midnite AIO and Sol-Ark both work great for AC coupling in my experience. If >> anyone is new to "All In One" inverters I recommend having tech support walk >> you through commissioning, check firmware, etc. the first time. >> >> >> >> >> On Sat, Aug 9, 2025, 8:47 AM William Miller via RE-wrenches >> <[email protected] >> <mailto:[email protected]>> wrote: >> Two options: >> >> 1. AC couple existing inverter to a battery capable inverter. >> >> 2. Replace existing inverter. >> >> I favor option 2. >> >> Option 1 is only preferred if gaining access to the existing inverter for >> replacement is difficult. An example would be a micro-inverter system. >> >> New AIO inverters allow true high voltage PV input so the existing stringing >> will probably not need to be modified. >> >> I’m new to this so type of upgrade so I welcome any corrections to these >> opinions. I did replace a Sunny Boy in my shop with a Soul Ark and it’s >> working great! >> >> William Miller >> Miller Solar.com >> 805-438-5600 >> www.millersolar.com <http://www.millersolar.com/> >> >> >> On Sat, Aug 9, 2025 at 8:26 AM Jay via RE-wrenches >> <[email protected] >> <mailto:[email protected]>> wrote: >> Is there a consensus as to what equipment to use for adding battery backup >> to normal GT inverter? >> >> >> >> I’ve had a few people ask and I actually haven’t done it. >> >> Thx >> Jay >> >> >> _______________________________________________ >> List sponsored by Redwood Alliance >> >> Pay optional member dues here: http://re-wrenches.org >> <http://re-wrenches.org/> >> >> List Address: [email protected] >> <mailto:[email protected]> >> >> Change listserver email address & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> There are two list archives for searching. 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