Hi Jason, I recently did a microinverter swap of the old D380's to 54 of the IQ7 190's. Once it was commissioned I started seeing random MI's drop out, but not always the same ones. I am pretty sure that this was due to overvoltage. I measured the line voltage at 255v with the system turned off.
Not being my original install, I am not sure if this was an issue before. I wonder if somehow the IQ series could be more sensitive to overvoltage? But anyway, try checking voltage... Cheers, Dave On Mon, Nov 1, 2021, 6:31 PM Jason Szumlanski < ja...@floridasolardesigngroup.com> wrote: > We have a site with 34 microinverters at two orientations. It's a couple > of months old. After about a month a couple of microinverters started > acting up and dropping power production for no apparent reason, then > finally started throwing Device Produced No Power issues and totally sopped > producing but continued communicating. Slowly but surely additional units > have dropped off. Now a few weeks later we have 24 of the 34 units with the > same issue. Ten random units are completely fine. These are on various > branch circuits and both orientations. There is no rhyme or reason to this > issue that I can see. > > I have never seen such a widespread failure on a single site (since the > M190) and we are not seeing failures of the IQ7A at higher than usual rates > on any other site. It seems almost impossible that we got a bad batch and > haven't seen a bunch of failures at at least one more site (it's more than > a box full of quantity 18 but less than 36). > > Enphase Tier 2 tech support was no help at all (many many hours on the > phone, on hold, etc, no real answers). It was supposedly escalated to a > higher level, but I never heard back. I finally gave up and just demanded > that they replace them all. I'm concerned that there is something else > wrong here and might be wasting my time replacing 2 dozen units. We > replaced two today and for the last half of the day they seemed to work > flawlessly, but for how long they will continue to work is anyone's guess. > > Needless to say, the client is quite concerned. > > If you have had any similar experiences I would love to hear the > resolution. > > > Jason Szumlanski > Florida Solar Design Group > > _______________________________________________ > 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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