We have installed a number of AC coupled systems over the years and believe we may have some of the first systems installed. Several are over 15 years old now and represent multiple brands and combinations of inverters. None of these systems relied on frequency shift by battery inverter to force solar inverter off line. So far no problems.
All of these systems utilized a 30 or 60 amp power relay having a 120 vac coil controlled by a smaller control relay having a 12 vdc coil directly controlled from aux. relay contacts in inverter. High battery voltage triggered array disconnect from secondary breaker panel on output side of battery inverter. Only design issues are getting a fail-safe arrangement of the N.O. and N.C. relay contacts correct, and program settings to avoid boiling AGM batteries. Jeff Yago Sent from my iPad Jeff Yago DTI Solar. Inc. 804-457-9566 [email protected] Although no trees were killed in the sending of this email, a large number of electrons were terribly inconvenienced..... > On Feb 5, 2018, at 10:04 PM, Kirpal <[email protected]> wrote: > > Hi Folks.....Outback no longer supports AC coupling on their Radian systems. > My understanding is that it is because of the unreliability of the ROCB > (remote operated circuit breaker) they were using. I have heard that they > are imminently going to release a white paper about AC coupling using a solid > state relay instead. I was wondering if any of you have done this? Do you > have any advice about the settings for the Auxiliary output settings that > control the relay? Looking for programming advice on the mate 3. I talked > to Outback today and they said until the white paper is released they won't > be giving instructions or advice on this capability. They did tell me not to > use the AC couple mode already programmed into the mate 3 auxiliary output > control. > Thanks in advance for any advice! On or off list!! > Cheers. > > Sunny Regards, > Kirpal Khalsa > Oregon LRT#25 > NABCEP Certified PV Installation Professional > Oregon Solarworks LLC > www.oregonsolarworks.com > 541-299-0402 > _______________________________________________ > List sponsored by Redwood Alliance > > List Address: [email protected] > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/[email protected]/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org >
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