Dave, We have been having the same problem with an Enphase system in Maine. I have been dealing directly with the third tier engineers at Enphase and they are working on a software fix for this. The"event" itself is only a fraction of a second but IEEE requirements are that the inverter shut down for five minutes. I only found out about this problem when it started for this customer. It sems that Enphase has already addressed the problem with a software fix for the M-190's. The M-215 fix should come, according to Enphase, by the end of March. It will be automatically downloaded through the Enlighten router. It's a known issue with Smart Meters with Enphase, but should be reconciled soon.
Daryl DeJoy NABCEP Certified PV installer Penobscot Solar Design www.penobscotsolar.com > Wrenchsters, > > > > I have an Enphase 7.5kW system on a residence with utility Smart Metering, > both the PV Production Meter as well as the utility billing meter being > "read" every hour. This system has experienced many "AC Frequency Out Of > Range" events since the system was installed. Below is copied the Enphase > Event message. This particular event was for 5 minutes. Most of the events > (all events are AC Frequency Out Of Range) last 5 to 10 minutes but > occasionally they have lasted from 45 minutes to 64 minutes. > > > > My question is: Could the use of the smart metering increase the likely > hood > that AC Frequency events happen? Or is this just a coincidence and that we > are dealing with fluctuating utility power AC Frequency issues? > > > > << > > > > Started on: Mon February 04, 2013 12:49 PM EST > > Cleared on: Mon February 04, 2013 12:54 PM EST > > > > Recommended action > > > > This condition should correct itself. No action is required. > > Details > > > > The microinverter reports that the frequency coming from the utility is > either too low or too high as specified by applicable regional standards. > > > > AC frequency is the frequency at which voltage varies on the utility grid. > Frequency Out of Range events are usually transient and self-correcting by > the utility. > > > > When the microinverter detects an out of frequency condition, it must > remain > offline until the utility has been within acceptable limits continuously > for > a short period of time (seconds to minutes, varies by region). If during > that time the utility again exceeds or falls short of acceptable limits, > the > five-minute timer must restart and the microinverter may not begin > producing > power for an additional short period following the last out-of-bounds > condition. >> > > > > Best, > > Dave > > > > > > David Palumbo > > Independent Power LLC > > 462 Solar Way Drive > > Hyde Park, VT 05655 > > www.independentpowerllc.com > > Vermont Solar Partner > > 25 Years Experience, (802) 888-7194 > > > > _______________________________________________ > 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