Thanks Mark!
Nice source I wasn't aware of!
jc
Jeff,
Here is what they submitted to the California Energy Commision:
<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
Mark Frye
Berkeley Solar Electric Systems
303 Redbud Way
Nevada City, CA 95959
(530) 401-8024
<http://www.berkeleysolar.com/>www.berkeleysolar.com
From: [email protected]
[mailto:[email protected]] On Behalf Of Jeff
Clearwater, Village Power Design
Sent: Wednesday, July 08, 2009 3:35 PM
To: RE-wrenches
Subject: [RE-wrenches] Efficiency Curves of Fronius Inverters?
Hey Folks,
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).
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.
Best,
Jeff
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.
All of these suggestions should be run by a Structural Engineer
before embarking, thus the 1st choice of working with a manu.
Good luck!
-jeff o
From the Solar, Wind and Hydro powered office of Jeff
Oldham/Regenerative SOLutions
____________________________________________________________
<http://thirdpartyoffers.juno.com/TGL2132/fc/BLSrjnsHGiu92lJJqoMGi0uE8kGS8cyBf0zjvb0ir0FblIZfJXPnNi0BtXC/>Protect
your home before it is too late. Click here for homeowner insurance
information.
_______________________________________________
List sponsored by Home Power magazine
List Address: [email protected]
Options & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
List-Archive:
http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
List rules & etiquette:
www.re-wrenches.org/etiquette.htm
Check out participant bios:
www.members.re-wrenches.org
--
~~~~~~~~~~~~~
Jeff Clearwater
Senior Design Engineer
NABCEP (tm) Certified Solar PV Installer
http://www.nabcep.org/
Village Power Design/NorthEast Solar Design
Turnkey Solar Design & Installation for the Commercial Sector
http://www.villagepower.com
[email protected]
Voice: 413-259-3776
Fax: 413-825-0703
65 Schoolhouse Rd
Amherst, MA 01002
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
_______________________________________________
List sponsored by Home Power magazine
List Address: [email protected]
Options & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
List-Archive:
http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
List rules & etiquette:
www.re-wrenches.org/etiquette.htm
Check out participant bios:
www.members.re-wrenches.org
--
~~~~~~~~~~~~~
Jeff Clearwater
Senior Design Engineer
NABCEP (tm) Certified Solar PV Installer
http://www.nabcep.org/
Village Power Design/NorthEast Solar Design
Turnkey Solar Design & Installation for the Commercial Sector
http://www.villagepower.com
[email protected]
Voice: 413-259-3776
Fax: 413-825-0703
65 Schoolhouse Rd
Amherst, MA 01002
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
_______________________________________________
List sponsored by Home Power magazine
List Address: [email protected]
Options & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
List rules & etiquette:
www.re-wrenches.org/etiquette.htm
Check out participant bios:
www.members.re-wrenches.org
