HI William, I appreciate your time and input as to your thinking about this project.
However this system already exists and has been in operation for some time. Client has a offgrid farm with 45kva generator. The situation is that the main house also already runs off this generator, but the generator doesn’t run 24/7/365. The other times of the year they run a honda 6500 at 120/240vac to power the house. The existing infrastructure of the farm is already set up for 120/208 3 phase and it wouldn’t be necessary or wanted to change all that for 7kw of inverters. That all said, I’ll probably run the inverters at 120/240 setup, as the back up generator is 120/240. And when they use the 3 phase generator its on 24 hrs a day. Yes it will only use 1 inverter to battery charge, but given 24 hr charge time, it’ll keep up the batteries no problem. Thanks to all, Jay > On Apr 2, 2020, at 11:31 AM, William Miller <will...@millersolar.com> wrote: > > Jay: > > This idea sounds wrong on many levels. Generators are designed to be loaded > evenly, with some allowance for normal deviations. Having separate loads > that can vary independently is asking for regulation problems. > > You did not state if the generator was wound Wye or Delta. This makes a > difference. > > Delta wound generators that provide 120/240 have one winding center-tapped. > That winding can provide only 1/3 of the rating of the generator (there is > some research that says the de-rate is greater). If this is the case, your > two inverters can each access only 1/6 of the generator capability. Sure you > might be able to draw more than 1/6, for a while... > > Have you checked to see if the generator can be field re-tapped to provide > 120 only? Then you could provide a generator-fed distribution and put all of > your 120 loads on it, providing the full generator capability. > > It has come to my attention recently that two Outback FXR (or FX, I am not > sure) inverters can be stacked on two legs of a three-phase input power > source. I had thought this was not possible. I know it works because I > accidently did this. I believe the supply was Wye configured. It was with a > mobile set up built by someone else. The inverters should have been the > Mobile version, and maybe this is what made this possible. You just can't > use an X240 on this setup. Consider this option if you must unbalance the > generator. Try to balance the loads and charging between the inverters and > avoid power-save settings (you can't power-save without an X240 anyway). > > I have had many customers ask me to do something that my intuition told me > was a bad idea. When I was younger I might comply, and learn to regret it. > Good luck and stay strong. > > William Miller > > -----Original Message----- > From: RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org > <mailto:re-wrenches-boun...@lists.re-wrenches.org>] On Behalf Of jay > Sent: Wednesday, April 1, 2020 4:39 PM > To: RE-wrenches > Subject: [RE-wrenches] magnum question > > Hi All, > > My question is can a single Magnum remote run 2 inverters each as master for > 120v? > > > I’ve got a client with a 3 phase generator, and I need two phases, but I > don’t need 240v. > > > 1. I can’t change the generator > 2. Two phases because I can’t load one phase that heavily. > > I can do 2 Outback FXR’s each as a master, but I’d need to have 2 Mate3S’s. > > But I don’t know if magnum has that possiblity? > > Thanks > > jay > > Peltz Power > > > > _______________________________________________ > List sponsored by Redwood Alliance > > List Address: RE-wrenches@lists.re-wrenches.org > <mailto:RE-wrenches@lists.re-wrenches.org> > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > <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 > <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 > <mailto:RE-wrenches@lists.re-wrenches.org> > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > <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 > <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/>
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