<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><div apple-content-edited="true"><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><span></span><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><br><br><br>Synergy Renewable Systems, LLC<br>PO Box 58<br>Stoughton, WI 53589<br>PH: 608-712-7862<br><a href="mailto:ryan.harkins@energycraft.com">ryan.harkins@energycraft.com</a><br>www.energycraft.com<br><br><br><br></span></span>
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<br><div><div>On Feb 5, 2013, at 11:10 AM, Dave Palumbo wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div>Thanks Daryl. Does your system also sometimes stay off for longer periods<br>sometimes? My clients system can stay off for up to 64 minutes.<br><br>Dave<br><br>-----Original Message-----<br>From: <a href="mailto:re-wrenches-bounces@lists.re-wrenches.org">re-wrenches-bounces@lists.re-wrenches.org</a><br>[mailto:re-wrenches-bounces@lists.re-wrenches.org] On Behalf Of<br><a href="mailto:penobscotsolar@midmaine.com">penobscotsolar@midmaine.com</a><br>Sent: Tuesday, February 05, 2013 12:01 PM<br>To: RE-wrenches<br>Subject: Re: [RE-wrenches] Enphase "AC Frequency out of Range"<br><br>Dave,<br> We have been having the same problem with an Enphase system in Maine. I<br>have been dealing directly with the third tier engineers at Enphase and they<br>are working on a software fix for this. The"event" itself is only a fraction<br>of a second but IEEE requirements are that the inverter shut down for five<br>minutes. I only found out about this problem when it started for this<br>customer. It sems that Enphase has already addressed the problem with a<br>software fix for the M-190's. The M-215 fix should come, according to<br>Enphase, by the end of March. It will be automatically downloaded through<br>the Enlighten router.<br> It's a known issue with Smart Meters with Enphase, but should be<br>reconciled soon.<br><br>Daryl DeJoy<br>NABCEP Certified PV installer<br>Penobscot Solar Design<br>www.penobscotsolar.com<br><br><br><br><blockquote type="cite">Wrenchsters,<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">I have an Enphase 7.5kW system on a residence with utility Smart <br></blockquote><blockquote type="cite">Metering, both the PV Production Meter as well as the utility billing <br></blockquote><blockquote type="cite">meter being "read" every hour. This system has experienced many "AC <br></blockquote><blockquote type="cite">Frequency Out Of Range" events since the system was installed. Below <br></blockquote><blockquote type="cite">is copied the Enphase Event message. This particular event was for 5 <br></blockquote><blockquote type="cite">minutes. Most of the events (all events are AC Frequency Out Of Range) <br></blockquote><blockquote type="cite">last 5 to 10 minutes but occasionally they have lasted from 45 minutes to<br></blockquote>64 minutes.<br><blockquote type="cite"><br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">My question is: Could the use of the smart metering increase the <br></blockquote><blockquote type="cite">likely hood that AC Frequency events happen? Or is this just a <br></blockquote><blockquote type="cite">coincidence and that we are dealing with fluctuating utility power AC <br></blockquote><blockquote type="cite">Frequency issues?<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite"><<<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">Started on: Mon February 04, 2013 12:49 PM EST<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">Cleared on: Mon February 04, 2013 12:54 PM EST<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">Recommended action<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">This condition should correct itself. No action is required.<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">Details<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">The microinverter reports that the frequency coming from the utility <br></blockquote><blockquote type="cite">is either too low or too high as specified by applicable regional<br></blockquote>standards.<br><blockquote type="cite"><br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">AC frequency is the frequency at which voltage varies on the utility grid.<br></blockquote><blockquote type="cite">Frequency Out of Range events are usually transient and <br></blockquote><blockquote type="cite">self-correcting by the utility.<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">When the microinverter detects an out of frequency condition, it must <br></blockquote><blockquote type="cite">remain offline until the utility has been within acceptable limits <br></blockquote><blockquote type="cite">continuously for a short period of time (seconds to minutes, varies by <br></blockquote><blockquote type="cite">region). If during that time the utility again exceeds or falls short <br></blockquote><blockquote type="cite">of acceptable limits, the five-minute timer must restart and the <br></blockquote><blockquote type="cite">microinverter may not begin producing power for an additional short <br></blockquote><blockquote type="cite">period following the last out-of-bounds condition. >><br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">Best,<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">Dave<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">David Palumbo<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">Independent Power LLC<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">462 Solar Way Drive<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">Hyde Park, VT 05655<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">www.independentpowerllc.com<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">Vermont Solar Partner<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">25 Years Experience, (802) 888-7194<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">_______________________________________________<br></blockquote><blockquote type="cite">List sponsored by Home Power magazine<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">List Address: RE-wrenches@lists.re-wrenches.org<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">Options & settings:<br></blockquote><blockquote type="cite">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">List-Archive:<br></blockquote><blockquote type="cite">http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">List rules & etiquette:<br></blockquote><blockquote type="cite">www.re-wrenches.org/etiquette.htm<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">Check out participant bios:<br></blockquote><blockquote type="cite">www.members.re-wrenches.org<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite"><br></blockquote><br><br>_______________________________________________<br>List sponsored by Home Power magazine<br><br>List Address: RE-wrenches@lists.re-wrenches.org<br><br>Options & settings:<br>http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org<br><br>List-Archive:<br>http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org<br><br>List rules & etiquette:<br>www.re-wrenches.org/etiquette.htm<br><br>Check out participant bios:<br>www.members.re-wrenches.org<br><br><br>_______________________________________________<br>List sponsored by Home Power magazine<br><br>List Address: RE-wrenches@lists.re-wrenches.org<br><br>Options & settings:<br>http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org<br><br>List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org<br><br>List rules & etiquette:<br>www.re-wrenches.org/etiquette.htm<br><br>Check out participant bios:<br>www.members.re-wrenches.org<br><br></div></blockquote></div><br></div></body></html>