Title: Efficiency Curves of Fronius
Inverters?
Jeff,
Try this.
http://www.gosolarcalifornia.org/equipment/inverter_tests/summaries/
Hope this helps.
See Ya!
Marv
Enphase Energy
707 763-4784 x7016
Jeff Clearwater, Village Power Design wrote:
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
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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
goso...@villagepower.com
Voice: 413-259-3776
Fax: 413-825-0703
65 Schoolhouse Rd
Amherst, MA 01002
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