We got caught once by this, the storage inverter was doing strange stuff, tripping breakers, etc. When I realized it was 120/208, we changed to a storage inverternwhich was specified for the arrangement and never had another issue. It's not just the voltage, the included angle between the cycles is 120 not 180 and some inverters can't handle it. Typically any single phase inverter that can be used as three inverters in three phase can handle it fine.
On Thu, Oct 17, 2024, 8:27 AM Dave Tedeyan via RE-wrenches < re-wrenches@lists.re-wrenches.org> wrote: > Hi All, > > I was just out of town installing a system for a friend just North of NYC. > I was confused when checking phase for consumption CT's when I found that > there was 120V L-N, but 206V L-L. I went and found the transformer, and > there was in fact one transformer for all the houses that I could see. It > had 4 wires coming out of it, and each house was tapped onto 3 of them. So > they actually are just using two legs of a 3 phase 208/120V distribution > system. > > Has anyone seen this sort of thing before? I was amazed that a bunch of > houses there all have 208V L-L, and it seems to not be causing problems. > Granted my friend says his A/C is really weak and that they have had some > funky problems with their electric oven. But they also just moved in last > year, don't have many 240V (or 208V) appliances, and are not very > electrical savvy, so they were clueless about this. > > Unfortunately this means that all the Enphase IQ8A's I just put on their > roof are useless, unless I go back to put in a transformer or get the > utility to do something about it. I am going to call the utility (Con Ed), > but I was just curious if anyone has had a similar experience and whether > their utility was open to changing it to 240V. > > Cheers, > Dave > > -- > > [image: Logo] <https://www.sungineersolar.com/> > Dave Tedeyan, P.E. > Owner | Sungineer Solar > p: he | him | his > a: 1653 Slaterville Rd. > <https://www.google.com/maps/search/1653+Slaterville+Rd.+%C2%A0+%7C%C2%A0Ithaca,+NY+14850?entry=gmail&source=g> > > <https://www.google.com/maps/search/1653+Slaterville+Rd.+%C2%A0+%7C%C2%A0Ithaca,+NY+14850?entry=gmail&source=g>| > Ithaca, > NY 14850 > <https://www.google.com/maps/search/1653+Slaterville+Rd.+%C2%A0+%7C%C2%A0Ithaca,+NY+14850?entry=gmail&source=g> > w: www.sungineersolar.com <http://www.sungineersolar.com/> > c: (607) 270-0370 > _______________________________________________ > List sponsored by Redwood Alliance > > Pay optional member dues here: http://re-wrenches.org > > 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 > > There are two list archives for searching. When one doesn't work, try the > other: > https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > http://www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > http://www.members.re-wrenches.org > >
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