I don't agree with this advice about the ferrite rings. Put the ferrite rings on the Enphase combined inverter output circuit from the AC combiner to the point of interconnection. That filters out all noise from all sources. I can be a pain with larger conductor sizes if you have to loop the conductors more than once. It sounds like you have #4 minimum for a 66A calculated circuit, which will take some space to accomplish. See here: https://enphase.com/en-us/support/faq/where-do-i-install-ferrite-toroid-rings <https://mailtrack.io/trace/link/5360f7e2abc1e49b7f3a800ee95a790a57e1e9a7?url=https%3A%2F%2Fenphase.com%2Fen-us%2Fsupport%2Ffaq%2Fwhere-do-i-install-ferrite-toroid-rings&userId=1613865&signature=0ad9d8a6734f8c49>
Now since you say you are using IQ7 micros, presumably you are using the IQ Combiner, which can handle 64 of those micros. When using the IQ Combiner, I have only had one instance where there was sufficient noise to cause a problem with micro->Envoy comms. In this case it was IQ6+ micros and it was a nearby heat pump pool heater causing the interference. It was easy to determine the source since it started each day with the pool pump and stopped when the setpoint pool temperature was reached. It would be helpful to know how you have the AC strings combined and where the Envoy is connected. On cell comms, no matter what, you are at a serious disadvantage. I will say also that cell comm issues can look like micro reporting issues. I had a cell comm site recently where it would all of a sudden not report for 1-3 expected reporting intervals in a row, then catch up. This looked a lot like micro reporting issues from the Enlighten perspective. A software update from Enphase resolved this. Honestly, I hate the Enphase cell comm 6-hour reporting cycle. It is pretty terrible actually. I avoid it at all costs. I had a community of 104 Enphase homes all commissioned on cell modems and it was a nightmare dealing with diagnostics and especially CT issues (since we could not power up systems that had no meter at the time of installation to check CTs for proper installation). I agree with Enphase on this point - get it connected to broadband, at least temporarily to diagnose issues. I have gone as far as using an Ethernet wi-fi bridge connected to my mobile hotspot to diagnose issues. Jason Szumlanski Florida Solar Design Group On Thu, Oct 15, 2020 at 5:01 PM <scot.a...@solarcentex.com> wrote: > We have a 53 IQ7 microinverter system on new-build construction that > reported and performed just great until the homeowner (a custom builder, > and one I’m trying not to unimpress!) moved in Sept 1 at which point > reporting went wonkers with inconsistent data, perceived underperformance > that seemed to shift through the array. All the stuff that makes > troubleshooting a nightmare. > > > > Enphase tech support level 1 was great and immediately pointed to a noise > issue and she had a level 2 tech check and confirm that. > > > > She recommended I get it on wifi (was on cell comms until the owner moved > in) so I could get near real time reporting, then to go through the pump > circuits to see what is making the noise and when I identify it to use > ferrite loops to reduce the noise on those circuits. > > > > Relatively new to Enphase since they brought on IQ7 and this is first PLC > comms issue I’ve had to date. IQ7+ has been rock-solid for us. > > > > Anybody have any experience with this noise and interference and > recommendation on ferrite installation? > > > > > _______________________________________________ > 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 > <https://mailtrack.io/trace/link/b01ab50577a96d5c6d51e53ec65712c321492f87?url=http%3A%2F%2Flists.re-wrenches.org%2Foptions.cgi%2Fre-wrenches-re-wrenches.org&userId=1613865&signature=112588f5f3a635f8> > > 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/ > <https://mailtrack.io/trace/link/1165224791c1f5406b2479d41f0610fb90cd22c6?url=https%3A%2F%2Fwww.mail-archive.com%2Fre-wrenches%40lists.re-wrenches.org%2F&userId=1613865&signature=8ced3d9f5bad0306> > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > <https://mailtrack.io/trace/link/3abd6e43a461e47afbe94545818cfb499c215731?url=http%3A%2F%2Flists.re-wrenches.org%2Fpipermail%2Fre-wrenches-re-wrenches.org&userId=1613865&signature=5ef22cba1f92417e> > > List rules & etiquette: > http://www.re-wrenches.org/etiquette.htm > <https://mailtrack.io/trace/link/4c7a43909ec21e151b96ca8b05b6f5e001eb5d65?url=http%3A%2F%2Fwww.re-wrenches.org%2Fetiquette.htm&userId=1613865&signature=2d237e67254e2ce3> > > Check out or update participant bios: > http://www.members.re-wrenches.org > <https://mailtrack.io/trace/link/f7d3627ba21c94be6bab199f4bea2879d08a3ce7?url=http%3A%2F%2Fwww.members.re-wrenches.org&userId=1613865&signature=f7e7520f5c1844d0> > >
_______________________________________________ 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 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
