Thanks for that Mac, very good to know, I have not been able to source and RDT yet, can only find RXTs, will check with my local Kholer tech friend.
Cheers! Sunniest regards, Stuart 441 599 2105 On Tue, 14 Jan 2025 at 21:02, Mac Lewis <maclew...@gmail.com> wrote: > Hi Stuart, > > The Kohler RDT switch is a much better switch for what you are doing; it > is a power seeking switch with no accessory device communication needed. > It is more expensive than the RXT switch because it has its own brain > board. A Kohler tech can adjust the delays for you if needed but the > defaults are good. We have a few of them out there with no issues. They > have them available as service entrance rated/indoor/outdoor etc. > > Good Luck! > > On Tue, Jan 14, 2025 at 2:55 PM August Goers via RE-wrenches < > re-wrenches@lists.re-wrenches.org> wrote: > >> 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 >>>>> >>>>> _______________________________________________ >> 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 >> >> > > -- > > > > Mac Lewis > > *"Yo solo sé que no sé nada." -Sócrates* >
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