<html>
<head>
<meta http-equiv=Content-Type content="text/html; charset=us-ascii">
<meta name=Generator content="Microsoft Word 11 (filtered)">
<title>Re: [RE-wrenches] Enphase Micro Inverter Energy System</title>
<style>
<!--
/* Font Definitions */
@font-face
{font-family:Wingdings;
panose-1:5 0 0 0 0 0 0 0 0 0;}
@font-face
{font-family:"Arial Narrow";
panose-1:2 11 5 6 2 2 2 3 2 4;}
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
@font-face
{font-family:Verdana;
panose-1:2 11 6 4 3 5 4 4 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman";}
h1
{margin-top:12.0pt;
margin-right:0in;
margin-bottom:3.0pt;
margin-left:0in;
page-break-after:avoid;
font-size:16.0pt;
font-family:Arial;
font-weight:bold;}
h3
{margin-top:6.0pt;
margin-right:0in;
margin-bottom:0in;
margin-left:0in;
margin-bottom:.0001pt;
page-break-after:avoid;
font-size:12.0pt;
font-family:Arial;
letter-spacing:-.5pt;
font-weight:normal;}
a:link, span.MsoHyperlink
{color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{color:blue;
text-decoration:underline;}
p
{margin-right:0in;
margin-left:0in;
font-size:12.0pt;
font-family:"Times New Roman";}
p.alist, li.alist, div.alist
{margin-top:0in;
margin-right:0in;
margin-bottom:0in;
margin-left:.5in;
margin-bottom:.0001pt;
text-indent:-.15in;
font-size:12.0pt;
font-family:"Times New Roman";}
p.ahead3, li.ahead3, div.ahead3
{margin-top:6.0pt;
margin-right:0in;
margin-bottom:0in;
margin-left:0in;
margin-bottom:.0001pt;
page-break-after:avoid;
font-size:12.0pt;
font-family:Arial;
letter-spacing:-.5pt;}
p.StyleaparaJustifiedAfter0pt, li.StyleaparaJustifiedAfter0pt, div.StyleaparaJustifiedAfter0pt
{margin:0in;
margin-bottom:.0001pt;
text-align:justify;
font-size:12.0pt;
font-family:"Arial Narrow";}
p.alistnead, li.alistnead, div.alistnead
{margin:0in;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:Arial;}
p.anumlist, li.anumlist, div.anumlist
{margin:0in;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman";}
p.aHead1, li.aHead1, div.aHead1
{margin-top:0in;
margin-right:0in;
margin-bottom:6.0pt;
margin-left:0in;
text-align:center;
page-break-after:avoid;
font-size:16.0pt;
font-family:Arial;
font-weight:bold;}
p.StyleHeading3Left0Firstline0, li.StyleHeading3Left0Firstline0, div.StyleHeading3Left0Firstline0
{margin-top:6.0pt;
margin-right:0in;
margin-bottom:0in;
margin-left:0in;
margin-bottom:.0001pt;
page-break-after:avoid;
font-size:12.0pt;
font-family:Arial;
letter-spacing:-.5pt;}
p.a-text, li.a-text, div.a-text
{margin:0in;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman";}
p.apara, li.apara, div.apara
{margin:0in;
margin-bottom:.0001pt;
text-indent:.35in;
font-size:12.0pt;
font-family:"Times New Roman";}
p.StyleHeading1Centered, li.StyleHeading1Centered, div.StyleHeading1Centered
{margin-top:0in;
margin-right:0in;
margin-bottom:6.0pt;
margin-left:.5in;
text-align:center;
page-break-after:avoid;
font-size:16.0pt;
font-family:Arial;
font-weight:bold;}
p.Styleapara1TimesNewRomanFirstline025, li.Styleapara1TimesNewRomanFirstline025, div.Styleapara1TimesNewRomanFirstline025
{margin:0in;
margin-bottom:.0001pt;
text-align:justify;
text-indent:.25in;
font-size:12.0pt;
font-family:"Times New Roman";
letter-spacing:-.25pt;}
p.PPAhead, li.PPAhead, div.PPAhead
{margin:0in;
margin-bottom:.0001pt;
font-size:16.0pt;
font-family:Arial;}
p.aparabullet, li.aparabullet, div.aparabullet
{margin-top:0in;
margin-right:0in;
margin-bottom:0in;
margin-left:.5in;
margin-bottom:.0001pt;
text-align:justify;
text-indent:-.25in;
font-size:12.0pt;
font-family:"Times New Roman";
letter-spacing:-.25pt;}
p.AAbulllist1, li.AAbulllist1, div.AAbulllist1
{margin:0in;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman";}
p.AAbulllist2, li.AAbulllist2, div.AAbulllist2
{margin-top:0in;
margin-right:0in;
margin-bottom:0in;
margin-left:1.0in;
margin-bottom:.0001pt;
text-indent:-.25in;
font-size:12.0pt;
font-family:"Times New Roman";}
p.Equation, li.Equation, div.Equation
{margin-top:0in;
margin-right:0in;
margin-bottom:6.0pt;
margin-left:0in;
text-align:center;
font-size:12.0pt;
font-family:"Times New Roman";}
span.EmailStyle33
{color:black;}
@page Section1
{size:8.5in 11.0in;
margin:1.0in 1.25in 1.0in 1.25in;}
div.Section1
{page:Section1;}
/* List Definitions */
ol
{margin-bottom:0in;}
ul
{margin-bottom:0in;}
-->
</style>
</head>
<body lang=EN-US link=blue vlink=blue>
<div class=Section1>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt;color:black'>I have a couple of questions for those who
have already done an Enphase installation. We are anticipating putting a system
in a major remodel. So the client has asked us to penetrate the roof with our
PV wiring (we do this a lot) and run the wiring through attic space and then to
the exterior wall where the meter/disco/main-panel reside. Again we do a fair
amount of installs like this using metal flex or metal clad cable and protection
plates.</span></font></p>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt;color:black'> </span></font></p>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt;color:black'>Q1: What kind of a 2-pole, 240 VAC disco
can we use before penetrating the roof? The Enphase web video shows something
in a single gang Hubble box.</span></font></p>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt;color:black'> </span></font></p>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt;color:black'>Q2: For more than one string, how and
where are folks doing AC circuit combining?</span></font></p>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt;color:black'> </span></font></p>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt;color:black'>- Peter </span></font></p>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt;color:black'> </span></font></p>
<div>
<p><font size=2 color=navy face=Arial><span style='font-size:10.0pt;font-family:
Arial;color:navy'>Peter T. Parrish, Ph.D., President<br>
California Solar Engineering, Inc.<br>
820 Cynthia Ave., Los Angeles, CA 90065<br>
Ph 323-258-8883, Mobile 323-839-6108, Fax 323-258-8885<br>
CA Lic. 854779, NABCEP Cert. 031806-26<br>
peter.parrish@calsolareng.com</span></font><font size=2 color=blue face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:blue'> </span></font></p>
</div>
<div>
<div class=MsoNormal align=center style='text-align:center'><font size=3
face="Times New Roman"><span style='font-size:12.0pt'>
<hr size=2 width="100%" align=center tabindex=-1>
</span></font></div>
<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
re-wrenches-bounces@lists.re-wrenches.org
[mailto:re-wrenches-bounces@lists.re-wrenches.org] <b><span style='font-weight:
bold'>On Behalf Of </span></b>Kelly Keilwitz, Whidbey Sun & Wind<br>
<b><span style='font-weight:bold'>Sent:</span></b> Friday, February 06, 2009 11:48
PM<br>
<b><span style='font-weight:bold'>To:</span></b> RE Wrenches listserve<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [RE-wrenches] Enphase
Micro Inverter Energy System</span></font></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> </span></font></p>
<p class=MsoNormal style='margin-bottom:12.0pt'><font size=3 face=Verdana><span
style='font-size:12.0pt;font-family:Verdana'>Hi Max,<br>
We’ve done one, have one in the shop ready to go, and another on
contract. Great solution for future expansion and clean installation. All mods
are in parallel, but installation (with adapter cord) is end to end. No main
inverter, no DC disconnect, no service or “grouped” AC disconnect
required. It’s just one (or more) branch circuit to a 15A DP breaker.
We’ve estimated that for systems <2.5 kW it’s more cost
effective, than using a string inverter. That’s with no shading. If you
have partial shading or different orientations the cost-effectiveness improves
dramatically for larger systems. <br>
<br>
Our inspectors want a partial-cover array inspection (to check inverter listing
and mounting), which is a bit of a hassle to arrange. Hopefully that will ease
up once they see a few installs.<br>
<br>
Enphase gets the customer with the web-based, subscription, system monitoring.
For small systems the production will barely cover the base cost + annual fee
(free for the first year).<br>
<br>
-Kelly<br>
</span></font><font face=Arial><span style='font-family:Arial'>Kelly Keilwitz,
P.E.<br>
</span></font><font size=2 face=Arial><span style='font-size:11.0pt;font-family:
Arial'>Whidbey Sun & Wind, LLC<br>
Renewable Energy Systems<br>
NABCEP Certified PV Installer<br>
987 Wanamaker Rd, <br>
Coupeville, WA 98239 <br>
PH & FAX 360-678-7131<br>
<a href="sunwind@whidbeysunwind.com">sunwind@whidbeysunwind.com</a><br>
</span></font><font face=Verdana><span style='font-family:Verdana'><br>
On 2/6/09 5:37 PM, "Max Balchowsky" <<a href="max@seesolar.com">max@seesolar.com</a>>
wrote:</span></font></p>
<p class=MsoNormal style='margin-bottom:12.0pt'><font size=3
face="Times New Roman"><span style='font-size:12.0pt'>I've been asked to
evaluate a set of plans that came accross the counter of a local municipality
recently. It was the microinverter system by Enphase. I've seen this product,
but this is the first actual installation I'm exposed to. Has anyone installed
these?<br>
<br>
Max Balchowsky<br>
SEE Systems</span></font></p>
<p class=MsoNormal style='margin-bottom:12.0pt'><font size=3 face="Courier New"><span
style='font-size:12.0pt;font-family:"Courier New"'><br>
</span></font><font size=2 face=Arial><span style='font-size:11.0pt;font-family:
Arial'><br>
<br>
</span></font></p>
</div>
</body>
</html>