Gary, Sorry for the delay. You had asked me about the Enphase/Sonnen solution, copied below.
Since this is a grid tied battery backup situation, the only brute OFF situations would be in a grid outage. Once the batteries are charged, then the Sonnen continues to sell extra PV to the grid. And in the case of a power outage, the Sonnen is actually a little slow in transitioning. It takes around 10 seconds (if I remember correctly) for the Sonnen to start powering the backed up loads. So no matter what you have for the AC coupled PV, you will have a small gap in power during an outage. I hope this answered your question... If not, I'll try to respond quicker next time. Cheers, Dave > 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 *--* *Dave Tedeyan* *Project Engineer* *Taitem Engineering, PC* 10 Verizon Lane, Lansing, NY 14882 Voice: (607) 930-3481 x6 www.taitem.com On Mon, Nov 13, 2017 at 10:52 AM, Drake < [email protected]> wrote: > Hi Nick, > > Please send me your information. Currently I am finishing up an Enphase > M-250, AC coupled system that is designed to taper charge batteries by > dropping out groups of inverters based on battery voltage. > > Thanks, > > Drake > > Drake Chamberlin > Athens Electric LLC > OH License 44810 > CO License 3773 > NABCEP Certified Solar PV > 740-448-7328 > > > > At 11:58 PM 11/11/2017, you 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 <[email protected]> on behalf >> of Gary Willett <[email protected]> >> Sent: Saturday, November 11, 2017 3:34 PM >> To: [email protected] >> 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 <[email protected]> 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:[email protected]] >> 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: [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/re >> [email protected]. >> >> 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: [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/re >> [email protected]. >> >> 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: [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/re >> [email protected]/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: [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/re >> [email protected]/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: [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/re >> [email protected]/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: [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] > g/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: [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
