<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 12 (filtered medium)"><style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri","sans-serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
span.EmailStyle17
{mso-style-type:personal-compose;
font-family:"Calibri","sans-serif";
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>I’d like to revisit a thread from early February where we were discussing Enphase microinverters going off line due to utility power quality issues when “Pinging” of smart meters occur.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I have a system where I was told by Enphase that they applied their software fix in late March, but in this case it did work in fixing the problem of the inverters dropping for anywhere from 5 minutes to an hour a couple of times per day. The drops are not regular and now it appears that they are not connected to the pinging of the meters on my customers site as we had the utility change their schedule to only ping at midnight.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>We are still seeing AC Frequency Out of Range errors almost daily on our M-215 inverters. Sometimes it is for only several inverters and other times up to the whole array of 32 inverters. On my other Enphase systems have no problems.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>What other issues besides utility pinging of my customers smart meter could be causing the problem?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Could the pinging of the neighbors meters by the utility off of the same transformer be affecting the Enphase M-215’s? I’m suspicious of something other than this because the errors occur at random times that appear unrelated to utility pinging.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thanks,<o:p></o:p></p><p class=MsoNormal>Dave<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>David Palumbo<o:p></o:p></p><p class=MsoNormal>Independent Power LLC <o:p></o:p></p><p class=MsoNormal>462 Solar Way Drive<o:p></o:p></p><p class=MsoNormal>Hyde Park, VT 05655<b><o:p></o:p></b></p><p class=MsoNormal><b><i>www.independentpowerllc.com <o:p></o:p></i></b></p><p class=MsoNormal>Vermont Solar Partner<o:p></o:p></p><p class=MsoNormal>25 Years Experience, (802) 888-7194 <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>