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
