For these installations, do you guys have more information on the
utilities' protocols that are causing problems with these inverters?
On 2013/2/5 12:51, penobscotso...@midmaine.com wrote:
Will do. Enphase had originally projected the beginning of February for
the release of the fix. It is now projected for the end of March. I am
hoping it will be a done deal before this next "season" starts here in
Maine. It might be good incentive to try Power One, Exeltech or other
inverters. In all honesty, my interpretation is that the Enphase inverters
are very sensitive and respond quickly to these "pings". I believe the
software fix will allow the inverters to ignore micro-events of less than
1/100th of a second or so (the length of the "ping". I will keep the list
in the loop!
Daryl
We see the same issue here in WI. Funny that you say 64 minutes, as some
of the M215s show the error for 64 minutes for us routinely. Could that
just be some designated error reporting length?
Daryl, thanks for the Enphase update. Keep us updated if you can on the
software fix.
Ryan Harkins
NABCEP Certified Solar PV Installer /
Project Manager
Synergy Renewable Systems, LLC
PO Box 58
Stoughton, WI 53589
PH: 608-712-7862
ryan.hark...@energycraft.com
www.energycraft.com
On Feb 5, 2013, at 11:10 AM, Dave Palumbo wrote:
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.com
Sent: 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
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