Thanks Daryl. Does your system also sometimes stay off for longer periods
sometimes? My clients system can stay off for up to 64 minutes.
Dave
-----Original Message-----
From:
re-wrenches-boun...@lists.re-wrenches.org[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of
penobscotso...@midmaine.comSent: Tuesday, February 05, 2013 12:01 PM
To: RE-wrenches
Subject: Re: [RE-wrenches] Enphase "AC Frequency out of Range"
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
_______________________________________________
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
PastedGraphic-3.pdf
