William, I should have mentioned that we have two strings of 11 M-215 on the system I was referring to. The error message we are getting is AC Freq. Out of Range. Sorry for any confusion.
Daryl > William > > Double check your voltage drop on the AC branch circuits, and make sure > that you consider your wiring between inverters. Remember that voltage > drop is additive and each inverter will see a slightly lower voltage drop > which could account for the voltage over error, especially if you are > seeing it at the end of the string. Enphase does have a white paper on > that and they are now recommending splitting long strings int he middle to > make to branch circuits out of one now to alleviate this problem. The > White Paper explains this in more detail. There was also a Solar Pro > article describing how voltage drop can result in voltage rise at the > inverter, and I have seen and measured this with a meter. Maybe the > inverters are correctly reporting the voltage rise? > > Bill > > On Mon, Nov 26, 2012 at 12:46 PM, William Miller > <will...@millersolar.com>wrote: > >> Friends: >> >> We have one site that is experiencing ongoing problems with errors >> indicating, "AC Voltage Out Of Range." This has occurred on two of 17 >> M190 >> inverters. Apparently the voltage is not really out of range, the >> inverter >> is erroneously reporting. >> >> I have one replacement in hand and was just about to drive the 2 hours >> to >> replace it when another inverter indicated the same problem. I ordered >> a >> second replacement. >> >> I fear that soon after I return to my shop from the job I will see >> another >> inverter with this problem. Has anyone else experienced this error? >> >> Thanks in advance, >> >> William >> >> Miller Solar >> Voice :805-438-5600 >> email: will...@millersolar.com >> http://millersolar.com >> License No. C-10-773985 >> >> ______________________________**_________________ >> List sponsored by Home Power magazine >> >> List Address: >> re-wrenc...@lists.re-wrenches.**org<RE-wrenches@lists.re-wrenches.org> >> >> Options & 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://lists.re-wrenches.org/**pipermail/re-wrenches-re-** >> wrenches.org<http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org> >> >> List rules & etiquette: >> www.re-wrenches.org/etiquette.**htm<http://www.re-wrenches.org/etiquette.htm> >> >> Check out participant bios: >> www.members.re-wrenches.org >> >> > > > -- > Bill Hoffer PE > NABCEP Certified Solar PV Installer™ > Sunergy Engineering Services PLLC > 2504 Columbia Ave NW > East Wenatchee WA 98802-3941 > bhof...@sunergyengineeringservices.com Cell:(509)679-6165 > _______________________________________________ > List sponsored by Home Power magazine > > List Address: RE-wrenches@lists.re-wrenches.org > > Options & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out participant bios: > www.members.re-wrenches.org > > _______________________________________________ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
