Let me say when I AC couple to a battery system, I usually have the battery system inverter larger than the AC system by about 1.5 times. The DC output of the inverter is the limit. If you have 100 Amp at 50-volt charging, then the inverter is limiting the AC array to less than 5kW. The last system I did I used Magnum with their micros, However, I did not oversize the inverter, as their system frequency shifts to limit the AC in battery mode.
On Sat, Nov 11, 2017 at 10:58 PM, Nick Soleil <nsol...@enphaseenergy.com> wrote: > Hi Wrenches, > > > We now have the ability to provide frequency based power curtailment. If > you are AC Coupling with a battery-based inverter that can fluctuate > frequency to regulate charge on the battery, then we can ramp our output up > and down to regulate the charge more evenly. > > > If you have an AC Coupled system using Enphase microinverters, reach out > to me and I will set your company up with a grid profile that can provide > this option. Once your company has been granted access to this profile, > you can update the profile using either our Installer Toolkit (ITK) app or > Enlighten. > > > Cordially, > > Nick Soleil > > Enphase Energy | Product Manager, Envoy and IQ Accessories > > > (707) 763-4784 x7267 // office > > (707) 321-2937 // cell > > [Enphase_esig_logo6.jpg]<https://enphase.com/> > > > Energy Evolved<http://enphase.com>™ > > Powering What’s Next™ | The Enphase Energy Management System< > http://ow.ly/HbVS3> > > > NABCEP Certified Solar PV Installer #03262011-300 > > California C10 Licensed Electrician #986315 > > Texas Master Electrician #284451 > > > > > ________________________________ > From: RE-wrenches <re-wrenches-boun...@lists.re-wrenches.org> on behalf > of Gary Willett <g...@icarussolarservices.com> > Sent: Saturday, November 11, 2017 3:34 PM > To: re-wrenches@lists.re-wrenches.org > Subject: Re: [RE-wrenches] Battery Backup for Older Enphase Systems > > DAVE: > > How does the brute force OFF transitions of the 8K of Enphase AC-coupled > micro-inverters affect the AC loads being served by the Sonnen? Are > there any noticeable/measurable glitches in the Sonnen's distributed AC? > > I am assuming the Enphase ON transitions are more graceful because of > the UL1741 prove-in period and the individual ramp-up of the individual > microinverters. > > Regards, > > Gary Willett PE > Icarus Engineering & Solar Services LLC > > > On 11/9/17 2:28 PM, Dave Tedeyan wrote: > > 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<http://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<http://www.getpimby.blogspot.com> > >> www.getpimby.com<http://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<http://www.re-wrenches. > org/etiquette.htm> > >> > >> Check out or update participant bios: > >> www.members.re-wrenches.org<http://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<http://www.re-wrenches. > org/etiquette.htm> > >> > >> Check out or update participant bios: > >> www.members.re-wrenches.org<http://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<http://www.re-wrenches. > org/etiquette.htm> > > > > Check out or update participant bios: > > www.members.re-wrenches.org<http://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<http://www.re-wrenches.org/etiquette.htm > > > > Check out or update participant bios: > www.members.re-wrenches.org<http://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
