<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Hi Larry,<div><br></div><div> I was under the impression that Sunpower were only for on grid?</div><div><br></div><div>And for off grid with the low voltages that we use, they are still requiring you to use positive ground? I've seen the white paper they did and it showed at lower voltages there is no need to positive ground, thats why for example those 90 watt panels using Sunpower cells are used with Negative ground.</div><div><br></div><div>curious,</div><div><br></div><div>jay</div><div><br></div><div>peltz power<br><div><div>On Mar 19, 2009, at 9:14 PM, Larry Crutcher, Starlight Solar wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">William,<div><br></div><div>I know you asked Jeff but thought I would respond as all we do are off grid, battery based systems. I typically see that the Vmp voltage of Sunpower modules is closer to spec with than with Kyocera, Sharp or Mitsubishi. In my opinion Sunpower modules are only surpassed by Sanyo. I realize this is anecdotal but after hundreds of installs you begin to notice these things.</div><div><br></div><div>Larry Crutcher</div><div><br><div><div>On Mar 19, 2009, at 5:46 PM, William Miller wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div> <font size="3">Jeff:<br><br> Have these modules worked for you in battery based systems?<br><br> William Mill<br><br> <br> At 01:27 PM 3/19/2009, you wrote:<br><br> </font><blockquote type="cite" class="cite" cite=""><font size="3">Hiya Jeff,<br> You are correct that the sunpower modules are positively grounded. You are<br> also correct that sunpower only deals with dedicated "dealers". That means<br> that if you are not one of their dealers you cannot get their panels. It is<br> my understanding that sunpower is always looking for new dealers, so you may<br> want to check in with them. As far as architectural review committees and<br> such, we have never had a problem using SPR modules in the areas where<br> review is an issue. The positive ground really does not affect aanything.<br> Instead of your negative wire being the grounded (white) conductor it is<br> your positive conductor that is grounded. This means you are switching the<br> negative instead of the positive in the DC disco. Sunpower sells packaged<br> systems, so they provide positive ground inverters from different<br> manufacturers.<br><br> Evergreen now has a black framed module, and I believe Sharp does too. I<br> hope this helps, any other questions feel free to contact me. <br> Jeff Blick<br> Lead PV Installer</font></blockquote></div> _______________________________________________<br>List sponsored by Home Power magazine<br><br>List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org">RE-wrenches@lists.re-wrenches.org</a><br><br>Options & settings:<br><a href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a><br><br>List-Archive: <a href="http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org">http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org</a><br><br>List rules & etiquette:<br><a href="http://www.re-wrenches.org/etiquette.htm">www.re-wrenches.org/etiquette.htm</a><br><br>Check out participant bios:<br><a href="http://www.members.re-wrenches.org">www.members.re-wrenches.org</a><br><br></blockquote></div><br></div></div>_______________________________________________<br>List sponsored by Home Power magazine<br><br>List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org">RE-wrenches@lists.re-wrenches.org</a><br><br>Options & settings:<br><a href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a><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></blockquote></div><br></div></body></html>