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<DIV><SPAN class=437310015-01012009>Bob and Joel,</SPAN></DIV>
<DIV><SPAN class=437310015-01012009>Depends on the powercenter model. Only the
oldest APT/Ananda models used Square D QOU breakers for DC. APT's later units
(the 4B) used QOU only for AC, and used Heinemann CF for DC. By the time
the brand was Pulse all DC breakers were Heinemann (or maybe equivalent Airpax),
and thus rated 125V DC.</SPAN></DIV>
<DIV><SPAN class=437310015-01012009></SPAN> </DIV>
<DIV><SPAN class=437310015-01012009>The bigger problem was that the later
models (and other models too) lacked sufficient breaker spaces; the 4B had
5. With 2 for PV input, 2 for PVGFP, and 1 for DC loads, that left no room for
expansion.</SPAN></DIV>
<DIV><SPAN class=437310015-01012009></SPAN> </DIV>
<DIV><SPAN class=437310015-01012009>By the way, what is the name of the most
recent iteration of Pulse, that followed Connect Energy? Just a few years ago,
they were developing a 48V grid-tied with batteries inverter. I had also heard
that they had none of the earlier personnel, just the name and intellectual
property, and were to be approached very cautiously.</SPAN></DIV>
<DIV><SPAN class=437310015-01012009>Allan</SPAN></DIV>
<DIV><SPAN class=437310015-01012009></SPAN> </DIV>
<DIV></DIV>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B>
re-wrenches-bounces@lists.re-wrenches.org
[mailto:re-wrenches-bounces@lists.re-wrenches.org] <B>On Behalf Of </B>robert
ellison<BR></FONT></DIV>
<DIV><STRONG><FONT face=Tahoma size=2></FONT></STRONG> </DIV>
<DIV>The better bet is the MPPT controller but keep in mind that the original
breakers are not rated for the series panel strings that we use now. The Square
D breakers are only UL rated for 50 volts not the typical 70 - 96
volts we see now.</DIV>
<DIV><BR>Here's to a great new year,</DIV>
<DIV> </DIV>
<DIV>Bob<BR></DIV>
<DIV class=gmail_quote><SPAN class=437310015-01012009> </SPAN></DIV>
<DIV class=gmail_quote><SPAN class=437310015-01012009> </SPAN>On Wed, Dec
31, 2008 at 1:26 PM, Joel Davidson <SPAN dir=ltr><<A
href="mailto:joel.davidson@sbcglobal.net">joel.davidson@sbcglobal.net</A>></SPAN>
wrote:<BR></DIV>
<BLOCKQUOTE class=gmail_quote
style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">Hi
Allan,<BR><BR>Good idea bypassing the old charge controller. I'll pass it on
to our customer.<BR><BR>...and good memory. The Ananda people did the PV
industry a real service by making the first UL listed power
center.<BR></BLOCKQUOTE></BODY></HTML>