You can use a one-pole relay. We show one-pole switching in our zero-export, self-consumption doc for PEL applications.
Nick Soleil Field Application Engineer Enphase Energy Cell: 707-321-2937 On Aug 28, 2017, at 6:44 AM, Drake <drake.chamber...@redwoodalliance.org<mailto:drake.chamber...@redwoodalliance.org>> wrote: Hello Wrenches, I am going to AC couple some Enphase inverters and found some really nice solid state, single pole relays to control them with. Enphase says I must use 2 pole relays for the control current even though the disconnects will turn off all power for maintenance. Enphase claims that the inverters will not shut down reliably with only one line opened. This does not make sense to me in view of UL 1741. Is Enphase correct in their claim, or are there other reasons that both poles need to be opened I want to use the solid state relays because the coil voltage is between 3 and 32 volts. This would avoid the need to add voltage dropping series resistors to protect the coil for higher battery voltages. Alternatively, does anyone know of reasonably priced, 2 pole solid state relays? Thanks, Drake Drake Chamberlin Athens Electric LLC OH License 44810 CO License 3773 NABCEP Certified Solar PV 740-448-7328 _______________________________________________ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org<mailto:RE-wrenches@lists.re-wrenches.org> Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm<http://www.re-wrenches.org/etiquette.htm> Check out or update participant bios: www.members.re-wrenches.org<http://www.members.re-wrenches.org>
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