Hi Stuart, Got it, now I see you're working with the MidNite AIO. This ATS topic came up not too long ago and I posted that we used to have success with Briggs & Stratton ATS units back when we were installing SMA Sunny Island systems. The Briggs unit does not need a control from an external source, it just switches over automatically (with a few second delay) once utility power is lost. We never had a single problem with these transfer switches.
You might check them out: https://www.nationwidegenerators.com/briggs-stratton-071270-200-amp-se-rated-120-240v-1ph-ats/?srsltid=AfmBOorCds2ktOcsHUf3GWmX5ba70K-ynjOcm1iizzIW6X-9OkSVpfHA I know that Briggs went through a bankruptcy a few years ago, but maybe they're still alive and kicking now. August On Tue, Jan 14, 2025 at 1:29 PM Stuart Kriendler <stuartkriend...@gmail.com> wrote: > Much appreciated August, > > Yes, that fancy Enphase System Controller is a nice piece of kit, overseen > a few of those and it is nice they pass through the grid power if there is > an issue, most of the time. > ;-) > I'm in love with the MN AIO, the build quality is impressive and great > value for money, with the CBI breakers and features mentioned earlier etc. > all built in. > Now seen an engineering sample do the business in an rugged off-grid > scenario for a few months and feel confident it will be a great GT hybrid > option, one catch is the need for a 3rd party ATS though. > (Hoping Midnite will make one of their own in time, as well as a wireway > to marry the PowerFlo 16 and AIO, both such nicely built solid equipment). > > Hopefully the Kohler RXT or Generac can work to keep the ATS cost below > $1k! > > Sunniest regards, > Stuart > 441 599 2105 > > > On Tue, 14 Jan 2025 at 16:02, August Goers <aug...@luminalt.com> wrote: > >> Hi Stuart - >> >> Many grid tied PV/ESS manufacturers (Enphase, SolarEdge, Franklin, Tesla >> to name a few) now have a Microgrid Interconnect Device (MID) that >> essentially acts as a smart transfer switch thus eliminating the need for a >> 3rd party automatic transfer switch. What brands equipment are you looking >> at? >> >> Best, August >> >> On Tue, Jan 14, 2025 at 11:10 AM Stuart Kriendler via RE-wrenches < >> re-wrenches@lists.re-wrenches.org> wrote: >> >>> Good day Wrenches, >>> >>> 2025 looks to be the year for installing more grid tied (GT) battery >>> back up hybrid inverters on new and existing GT PV systems in a whole house >>> backup scenario >>> i.e. Utility - Hybrid Inverter - House Loads >>> >>> With these newer GT hybrids so 'sensitive', any fault on the PV side can >>> cause them to shut down, thus stopping power to the house. >>> To minimise this it seems sensible to add an ATS to the system such that >>> if/when the hybrid faults, the ATS w switch to grid power, bypass the >>> hybrid, and power the house. >>> This could save an emergency truck roll or late night phone call for >>> installers. >>> >>> Anyone have experience on good value-for-money Listed automatic transfer >>> switches that would do the job, 200A, 120/240V? >>> >>> Two name brand options that came up on the less expensive end of the >>> spectrum are: >>> - Generac >>> RXSW200A3 >>> (https://www.generac.com/residential-products/standby-generator-transfer-switches/automatic/rxsw200a3/) >>> >>> - Kohler 200-amp, Service Entrance RXT ATS | RXT-JFNC-200ASEQS4 ( >>> https://www.kohler.com/content/dam/kohler-com-NA/Lifestyle/PDF/PDF-g11152.pdf >>> ) >>> >>> However, they each say their ATSs must be used with the corresponding >>> generator. >>> >>> I would imagine a simple 'grid sense' functionality would mean that if >>> the hybrid's output was connected to the Grid/Normal lugs and the grid was >>> connected to the Gene/Backup lugs in the ATS it should work. >>> However I don't want to end up with an expensive surprise in a >>> relatively remote location where I operate! >>> >>> Would appreciate any feedback with experience with the above or other >>> ATS models or how people are future proofing for this scenario? >>> To do future maintenance/torque checks etc. in a GT hybrid whole home >>> backup situation, it would be nice to bypass the inverter and keep the >>> house powered for safety and homeowner convenience in general. >>> >>> Thanks and best. >>> >>> Sunniest regards, >>> Stuart >>> 441 599 2105 >>> _______________________________________________ >>> 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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