Wrenches One size might not fit all the SMA Storage is limited to max 3 LG batteries, that is a far cry from some of my smaller systems. Also LG per LG is not a good battery for sustained back up, you may want to verify but there is also inverter limitations. Outback might be an option for true long term output while off grid. Jerry
On Sep 12, 2018 11:22 PM, "Marco Mangelsdorf" <ma...@pvthawaii.com> wrote: The SMA Sunny Storage looks promising. It will be able to work with the LGC RESU10 HV battery and, sooner rather than later I hope, BYD package as well. And it will allow for a backup generator tie in. Ta-dah! marco On Thursday, September 13, 2018, Bruce Erickson <br...@mendocinosolar.com> wrote: > Hi Marco, > > I partially agree with you. I recently bid Outback, StorEdge, and Pika > options for a GTBB customer, partly to understand pricing for myself, and > found OB to be so much more expensive. The customer really wanted a system > that would be to be able to charge the batteries off a generator in an > outage, understandably. But the extra thousands in cost for OB ended up > being prohibitive. Add-on rapid shutdown is a killer. So he’s opting for a > nice modern high voltage DC system, with optimizers and built-in RSD, but > when there’s an extended outage, he’ll have to hope the sun comes out right > after the storm to recharge the batteries, or he’ll end up in the dark > again, until the grid comes back. Maybe there’s a high voltage inverter > that allows generator charging, or a third-party battery charger, that I’m > not aware of. Otherwise high voltage systems are very limited for backup, > at least in winter storm scenarios. > > *Bruce Erickson* > Mendocino Solar Service > PO Box 1252 > Mendocino, CA 95460 > 707-937-1701 > 707-937-1741 fax > br...@mendocinosolar.com > > *Connecting Mendocino County to Solar Since* *1994* > > > > > > > > On Sep 12, 2018, at 6:26 PM, Marco Mangelsdorf <ma...@pvthawaii.com> > wrote: > > Aloha all, > > At the risk of whacking at a hornet’s nest…lower voltage DC is soooo 80s > and 90s especially when it comes to grid-tie applications with battery > storage. > > The time of OutBack and Schneider and all the others doing 48VDC is > drawing to close. Enough already. Thank you for your service. > > The sooner the industry fully migrates to higher voltage DC (Tesla, LG > Chem, BYD and others), the better. > > marco > > *From:* RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org > <re-wrenches-boun...@lists.re-wrenches.org>] *On Behalf Of *Peter Giroux > *Sent:* Wednesday, September 12, 2018 3:03 PM > *To:* RE-wrenches > *Subject:* Re: [RE-wrenches] Any thoughts on this approach to adding > battery backup to an existing grid tie system will be appreciated. > > Ken > > We have had terrific success with AC Coupling. Yes there are some > differences from Dc Coupled systems but if built properly, customer is > willing to learn how to use it and maintain it and you put the correct > relays in to shut off the string inverters if battery voltage gets to high, > great. > > If you have a customer that refuses to exercise the system, not check > the batteries if they are fla's and overloads it when the power goes down > then not so cool. We have customers that power shave with it, have had > backup power for days until the power came back on as they monitored the > loads and were judicious about use. Ray is right in the sense the customer > needs to learn how to use the system or they can royally screw it up ( yes > we have had two do this, one learned the other not ). > > The Radians have been great work horses for this application, sadly as > Ray mentioned Outback has moved away from it as a primary solution. > > peter giroux > ASAE > Atlanta > > ----- Original Message ----- > *From:* Ken Schaal <k...@commonwealthsolar.com> > *To:* RE-wrenches <re-wrenches@lists.re-wrenches.org> ; Ken Schaal > <cwsol...@gmail.com> > *Sent:* Wednesday, September 12, 2018 8:11 PM > *Subject:* [RE-wrenches] Any thoughts on this approach to adding battery > backup to an existing grid tie system will be appreciated. > > https://www.youtube.com/watch?v=eyhkIfS5Z-Q > ------------------------------ > > _______________________________________________ > 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
_______________________________________________ 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
