You could go with a Sonnen. That is meant to be AC coupled, and its a very simple install. Nice piece of equipment, but its expensive. We just installed one that has right around 8kw of Enphase M215 inverter output. So far, no issues.
Cheers, Dave *--* *Dave Tedeyan* *Project Engineer* *Taitem Engineering, PC* 10 Verizon Lane, Lansing, NY 14882 Voice: (607) 930-3481 x6 www.taitem.com On Thu, Nov 9, 2017 at 2:07 PM, John <j...@gosolar.co.nz> wrote: > We did one a few months ago using Outback VFX3024e, 1000 a/h battery bank > - basically an Off-Grid system but tied into the switchboard, with customer > nominated circuits dedicated to the Off-Grid system. The grid is acting > like the backup generator via a relay. > > The only little hiccup was that when the *generator* was called on, the > Off-Grid system had to sync in with the real Grid, it was not immediate. > > Apart from that - seems to work O.K. John, GoSolar > Ltd, Christchurch, N.Z. > > ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ > ++++++++++++++++++++++++++++++++++++++++++++++++ > > -----Original Message----- > From: RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] On > Behalf Of Matt Sherald > Sent: Friday, 10 November 2017 3:43 a.m. > To: RE-wrenches > Subject: [RE-wrenches] Battery Backup for Older Enphase Systems > > I'd appreciate some ideas as to what backup system designs work well with > the older Enhase equipment (M250/215 era). > > I've tried this at home with a XW4024, but the frequency rise causes the > lights to flicker and it is awfully unpleasant. > > A customer of mine has asked about backup to go with an array that uses > M250s and this prompted me to write. > > Thanks in advance! > > -Matt > > -- > Matt Sherald > PIMBY Energy, LLC > NABCEP Certified Solar PV Installer® > 304-704-5943 > > www.getpimby.blogspot.com > www.getpimby.com > _______________________________________________ > List sponsored by Redwood Alliance > > 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 > > List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches. > org/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > > > _______________________________________________ > List sponsored by Redwood Alliance > > 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 > > List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches. > org/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > > _______________________________________________ List sponsored by Redwood Alliance 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 List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
