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<DIV><FONT face=Arial size=2>Wrenches,</FONT></DIV>
<DIV><FONT face=Arial size=2>Following on comments about switching to grid-tie
(or any other changes), what do you do with modules, mounts, inverters, etc.
that no longer serve your clients' needs? Do you or your clients contribute the
unneeded or unwanted equipment to a charitable or non-profit organization
that qualifies the donation for a tax deduction? What are your favorite
charities and non-profit orgs (what churches, schools, etc.)?</FONT></DIV>
<DIV><FONT face=Arial size=2>Joel Davidson</FONT></DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=allan@positiveenergysolar.com
href="mailto:allan@positiveenergysolar.com">Allan Sindelar</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=RE-wrenches@lists.re-wrenches.org
href="mailto:RE-wrenches@lists.re-wrenches.org">RE Wrenches</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Wednesday, August 06, 2008 7:55
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> [RE-wrenches] Inverter for
Switch to GT</DIV>
<DIV><BR></DIV><!-- Converted from text/rtf format -->
<P><FONT face=Arial>Wrenches,</FONT> <BR><FONT face=Arial>Occasionally, but
more frequently recently, we get requests to turn off-grid systems into
grid-tie systems. Usually this involves sale of a property to a new owner, and
either grid is brought in to facilitate an easier sale or the new owner brings
it in. Once grid is in, the off-grid-based system is of limited utility, as
the equipment won't sell back. Most of these new owners want a
maintenance-free batteryless system.</FONT></P>
<P><FONT face=Arial>Unfortunately, most off-grid arrays don't easily convert,
as the string sizing doesn't match. Here's my question: I have two of these
requests right now. Both are systems we installed in the late 90s. One has ten
BP 275s, one has twelve. These are standard 12V 75W modules common to that
time. I need advice on inverters that will work with these strings.</FONT></P>
<P><FONT face=Arial>The Sunny Boy 700, which is the only small inverter model
SMA still offers, will handle one string of up to nine of these in our
temperature range. Larger models require higher string voltage. Fronius also
requires higher voltage.</FONT></P>
<P><FONT face=Arial>You know, it's a real problem to have to explain to new
green-oriented homeowners that there's nothing I can do with their
ten-year-old PV system to make it spin their new meter backward. It doesn't do
much for the mainstream perception of PV for these folks.</FONT></P>
<P><FONT face=Arial>What will work with these existing arrays, please?</FONT>
</P>
<P><FONT face=g>Allan Sindelar</FONT> <BR></P></BLOCKQUOTE></BODY></HTML>