Asco and kohler both are good, and have used them on AC coupled systems with great success. Ya l know AC coupled is not the ideal but in retrofitting it's very common unless you also can replace the inverter with something like Solark.
On Tue, Jan 14, 2025, 11:10 AM Stuart Kriendler via RE-wrenches < [email protected]> 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: [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. When one doesn't work, try the > other: > https://www.mail-archive.com/[email protected]/ > 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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