We've been using manual transfer switches with the Midnite AIO's On Fri, Jan 17, 2025 at 7:29 AM Stuart Kriendler via RE-wrenches < re-wrenches@lists.re-wrenches.org> wrote:
> Many thanks again Mac and Wrenches, > > This is now put to bed with confirmation the only listed 200A ATS that > will work without a 12V switching controller that I could find around the > $1k mark is indeed the Kohler RDT series. > (All currently manufactured Generac, Briggs & Stratton and Cummins ATS > options require a controller to talk to the same name brand gene to > switch/transfer, or a Mcgiver move.) > > I found a supplier in Florida who gave a slight volume discount and seems > solid. > Here is a link to the product, pricing, specs and manual through them: > > https://bnhgenerators.com/product/kohler-200-amp-rdt-ats-rdt-cfnc-0200a-qs7/ > > And another supplier option with similar pricing, and the 100A version > readily available in case helpful: > > https://www.electricgeneratorsdirect.com/Kohler-RDT-CFNC-0200A-QS7/p2202.html > > Best to all and thanks again. > > 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* >> > _______________________________________________ > 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 > > -- Michael Morningstar Morningstar Electric Inc PO Box 1494 Mount Shasta, CA 96067 530-921-0560 CSLB 1116835 mjmornings...@gmail.com
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