<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN">
<HTML>
<HEAD>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii">
<META NAME="Generator" CONTENT="MS Exchange Server version 6.0.4630.0">
<TITLE>Battery to Grid-Tie followup re Enphase</TITLE>
</HEAD>
<BODY>
<!-- Converted from text/rtf format -->
<P><FONT FACE="Arial">Wrenches,</FONT>
<BR><FONT FACE="Arial">Thank you for the good responses re batteryless GT inverters for existing off-grid arrays. It looks like PV Powered, Kaco, and Enphase are good possibilities.</FONT></P>
<P><FONT FACE="Arial">I investigated the Enphase approach more thououghly and came up with a few questions that weren't addressed on their website. Here are the questions and answers for others' benefit.</FONT></P>
<P><FONT FACE="Arial">Hi Allan,</FONT>
<BR><FONT FACE="Arial">Marv Dargatz passed along your inquiries about Enphase, from the WRENCHES mailing list, to me, for follow-up. Answers are inline below.</FONT></P>
<P><FONT FACE="Arial">1. Your AC output is 240V if single-phase. As your wiring requires a reference neutral conductor, I fear that because existing off-grid arrays typically run DC from the pole to the BOS, the existing two conductors plus ground of the DC won't work to carry the Enphase's AC. Your ideas? </FONT></P>
<P><FONT FACE="Arial">This is problematic. Enphase uses the neutral to carry its powerline communications back to the EMU (network gateway / meter) as well.</FONT></P>
<P><FONT FACE="Arial">2. Are your DC pigtails MC1, MC3, Tyco Solarlok, or reconfigurable? </FONT>
</P>
<P><FONT FACE="Arial">You can order the Enphase Micro-inverters with either the non-locking (MC-3) or locking (MC-4) style connectors. They're two different SKUs, so you just need to make sure that you order the correct type for your solar module. These are not field-reconfigurable. </FONT></P>
<P><FONT FACE="Arial">3. What do you suggest for older modules with j-boxes? A single MC extension cable, cut to length? Can the inverters be ordered with longer ordinary MC cable pigtails for this application? </FONT></P>
<P><FONT FACE="Arial">The D/C leads coming off of the Enphase Micro-inverter are only a couple of inches long, coming out of the enclosure. We don't currently have a SKU option for ordering longer leads. Yes, making your own leads, terminated in the j-box, and having enough length to connect to the Enphase D/C leads, would be required. The orientation of the module, where the Micro-inverter was racked, etc., would affect this length consideration.</FONT></P>
<P><FONT FACE="Arial">4. Do you reimburse bona fide installation professionals for warranty expenses?</FONT>
</P>
<P><FONT FACE="Arial">Yes! Enphase has recently finalized the terms of its Replacement & Reimbursement policy. This will be posted on our public website soon. I can send you an email notification when it is posted. This policy is quite reasonable; I think you will like it, but would appreciate any/all feedback on it, if you have any.</FONT></P>
<P><FONT FACE="Arial">Please let me know if I can answer any other questions for you. Thank you.</FONT>
</P>
<P><FONT FACE="Arial">Best Regards,</FONT>
<BR><FONT FACE="Arial">Scott King</FONT>
<BR><FONT FACE="Arial">Enphase Energy,</FONT>
<BR><FONT FACE="Arial">Customer Support</FONT>
<BR><FONT FACE="Arial">Ph. (877) 797-4743, ext. 7026</FONT>
<BR><FONT FACE="Arial">sking@enphaseenergy.com</FONT>
<BR><A HREF="http://www.enphaseenergy.com"><U><FONT COLOR="#0000FF" FACE="Arial">http://www.enphaseenergy.com</FONT></U></A>
</P>
<P><FONT FACE="g">Allan Sindelar</FONT>
<BR><A HREF="mailto:allan@positiveenergysolar.com"><U></U><U><FONT COLOR="#0000FF" SIZE=2 FACE="g">allan_(at)_positiveenergysolar.com</FONT></U></A>
<BR><FONT SIZE=2 FACE="g">NABCEP certified solar PV installer</FONT>
<BR><FONT SIZE=2 FACE="g">Positive Energy, Inc.</FONT>
<BR><FONT SIZE=2 FACE="g">3225A Richards Lane</FONT>
<BR><FONT SIZE=2 FACE="g">Santa Fe NM 87507</FONT>
<BR><FONT SIZE=2 FACE="g">505 424-1112</FONT>
</P>
</BODY>
</HTML>