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<DIV dir=ltr align=left><SPAN class=390594122-08072009><FONT color=#0000ff
size=2 face=Arial>Jeff,</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=390594122-08072009><FONT color=#0000ff
size=2 face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=390594122-08072009><FONT color=#0000ff
size=2 face=Arial>Here is what they submitted to the California Energy
Commision:</FONT></SPAN></DIV>
<DIV dir=ltr align=left> </DIV>
<DIV dir=ltr align=left><A
href="http://www.gosolarcalifornia.ca.gov/equipment/inverter_tests/summaries/Fronius%20IG%204000.pdf">http://www.gosolarcalifornia.ca.gov/equipment/inverter_tests/summaries/Fronius%20IG%204000.pdf</A></DIV>
<DIV dir=ltr align=left><FONT color=#0000ff size=2
face=Arial></FONT> </DIV>
<DIV dir=ltr align=left><FONT color=#0000ff size=2
face=Arial></FONT> </DIV>
<DIV dir=ltr align=left><SPAN lang=en-us><FONT size=2 face=Arial>Mark
Frye</FONT></SPAN> <BR><SPAN lang=en-us><FONT size=2 face=Arial>Berkeley Solar
Electric Systems</FONT></SPAN> <BR><SPAN lang=en-us><FONT size=2 face=Arial>303
Redbud Way</FONT></SPAN> <BR><SPAN lang=en-us><FONT size=2 face=Arial>Nevada
City, CA 95959</FONT></SPAN> <BR><SPAN lang=en-us><FONT size=2
face=Arial>(530) 401-8024</FONT></SPAN> <BR><SPAN lang=en-us></SPAN><A
href="http://www.berkeleysolar.com/"><SPAN lang=en-us><U><FONT color=#0000ff
size=2 face=Arial>www.berkeleysolar.com</FONT></U></SPAN></A><SPAN
lang=en-us><FONT size=2 face=Arial> </FONT></SPAN> </DIV>
<DIV> </DIV><BR>
<DIV dir=ltr lang=en-us class=OutlookMessageHeader align=left>
<HR tabIndex=-1>
<FONT size=2 face=Tahoma><B>From:</B> re-wrenches-bounces@lists.re-wrenches.org
[mailto:re-wrenches-bounces@lists.re-wrenches.org] <B>On Behalf Of </B>Jeff
Clearwater, Village Power Design<BR><B>Sent:</B> Wednesday, July 08, 2009 3:35
PM<BR><B>To:</B> RE-wrenches<BR><B>Subject:</B> [RE-wrenches] Efficiency Curves
of Fronius Inverters?<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV>Hey Folks,</DIV>
<DIV><BR></DIV>
<DIV>Anyone have or know where I can get my hands on the efficiency vs. wattage
curve for the Fronius IG series (the old series - not the Plus).</DIV>
<DIV><BR></DIV>
<DIV>I have a 4000 in stock and wondering if I can apply it to a friend's 2660
watt system without losing much to efficiency at low power levels.</DIV>
<DIV><BR></DIV>
<DIV>Best,</DIV>
<DIV><BR></DIV>
<DIV>Jeff</DIV>
<DIV><BR></DIV>
<DIV><BR></DIV>
<DIV><BR></DIV>
<BLOCKQUOTE cite="" type="cite">There are numerous options here: most
ground mount manu's offer ballasted systems, I would look to them 1st. Other
systems I've seen or used - 1) Pour a continuous surface "footer" that is
large enough in size to provide the proper ballast for the uplift in your
area, pour one along the S. edge/legs and another along the back/north legs.
2) Tie all legs together via a horiz. rail at least 6' wide and embed this in
a rock filled gabion, again of the required weight. 3) Limestone is easy to
drill, useing a hammer drill and extension bit drill 11/16" - 3/4" holes at
least 18" into the stone at an angle, vary all angles as viewed in plan as
they relate to the N/S line of the array (not as they relate to level), to
mitgate pull-out from them all being in a line. i.e. - 1st leg hole is 90
degrees to the N/S line, 2nd leg is 180 from this, 3rd is 45 and so on, in
other words if looking in plan and you could see all holes they would radiate
around the "face of a clock" with each leg hole on a different "hour".
Finally, epoxy in 5/8" all thread, you can pre-bend the end to come out of the
hole verticle or use a swivel connector from Uni-strut, B-line or
equal.<BR></BLOCKQUOTE>
<BLOCKQUOTE cite="" type="cite">All of these suggestions should be run by a
Structural Engineer before embarking, thus the 1st choice of working with a
manu.<BR></BLOCKQUOTE>
<BLOCKQUOTE cite="" type="cite"><BR> </BLOCKQUOTE>
<BLOCKQUOTE cite="" type="cite">Good luck!<BR></BLOCKQUOTE>
<BLOCKQUOTE cite="" type="cite">-jeff o<BR><BR>>From the Solar, Wind and
Hydro powered office of Jeff Oldham/Regenerative SOLutions<BR></BLOCKQUOTE>
<BLOCKQUOTE cite="" type="cite"><FONT
size=-1><BR><BR>____________________________________________________________<BR></FONT><A
href="http://thirdpartyoffers.juno.com/TGL2132/fc/BLSrjnsHGiu92lJJqoMGi0uE8kGS8cyBf0zjvb0ir0FblIZfJXPnNi0BtXC/"><SPAN></SPAN>Protect
your home before it is too late. Click here for homeowner insurance
information.</A></BLOCKQUOTE>
<BLOCKQUOTE cite=""
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<DIV><BR></DIV>
<DIV><BR></DIV><X-SIGSEP><PRE>--
</PRE></X-SIGSEP>
<DIV>~~~~~~~~~~~~~<BR>Jeff Clearwater<BR>Senior Design Engineer<BR>NABCEP (tm)
Certified Solar PV Installer<BR>http://www.nabcep.org/<BR>Village Power
Design/NorthEast Solar Design<BR>Turnkey Solar Design & Installation for the
Commercial
Sector<BR>http://www.villagepower.com<BR>gosolar@villagepower.com<BR><BR>Voice:
413-259-3776<BR>Fax: 413-825-0703<BR>65 Schoolhouse
Rd<X-TAB> </X-TAB><BR>Amherst, MA
01002<BR>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</DIV></BODY></HTML>