At 06:50 PM 3/1/2010, you wrote:
You Wrote
"This is déjà vu.
The only other choice would be to use a contactor
to ensure PV disconnection when the grid is down
- then you could tap the PV on the load side of the transfer switch."
This is definitely deja vu all over again. A
system I de
I was recently told by SMA that in the event that
the inverters did connect to generator output,
and the load was less than the inverter output,
that the voltage would rise and the inverters
would fall off line. A year or so before I'd
been told by another SMA representative that
generator c
Esteemed wrenches:
We are bidding on an industrial sized project. What is the approximate land
usage of a ground array in acre/MW. I have estimated around 5 acre/MW but I'm
really not sure if I am way high or low. Thanks.
Mike
Michael Gullo
Solar Solutions LLC
Marlton, NJ
NABCEP Certified PV I
Denver International airport just installed 1.6 megawatt on 9 acres.
--
Sunny Regards,
Kirpal Khalsa
NABCEP Certified Solar PV Installer
Renewable Energy Systems
www.oregonsolarworks.com
541-218-0201 m
541-592-3958 o
On Tue, Mar 2, 2010 at 7:23 AM, Michael Gullo wrote:
> Esteemed wrench
It will depend on the technology of the modules, too--whether you're using
monocrystalline, poly, or thin-film. I recently spec'ed a thin-film design
which worked out to 150 kW per acre. With more efficient modules you could
be 50% better, so your 5 acre/MW number is reasonable.
It also will depen
All,
If the grid-tie inverter is operating under UL1741 (and therefore IEEE1547),
then the inverter has to cease output within 1 second of the voltage going
over 10% of the base voltage. So in the case where the generator is
outputting and the load is less than the inverter output, the voltage wi
While inverters are supposed to work this way, and do so very well on
the grid, have any inverters been formally TESTED with various
generators to confirm the theory?
Anecdotes and theories are not enough. Until there are TESTS and
guarantees from inverter manufacturers that expensive generator co
Hello all
I am under a time line so I do not have time to review until later. But I have
tried a few times and I can not ever get a grid tied inverter to sync with a
generator. I have been successful with bimodal (Battery based)inverters in a
varied ways. (Apollo, Outback, Xantrex)
A word
I know a guy in Colombia who connects his Magnatek Aurora inverter to
a genset when the grid is down. Seems to work most of the time.
He's got some sort of chinese turbine and chinese controller that
dumps power off the back-up generator when necessary.
Isn't there some way to detect reverse
Has anyone worked through the process of getting their customer a federal
grant in lieu of the tax credit? (supplying more of the endless paperwork
to the accountant)
One of the requirements is that a PE stamp the design. The requirement is
vague and it does not say what kind of PE or systems o
We have had clients receive the grant without the PE stamp (only on
installs under 10 kW so far). Part of the paperwork was an affidavit that
the system was standard design and met all codes in the jurisdiction. We
included a wiring diagram.
Matt
Matthew Partymiller
Solar Energy Solutions LLC
Eric..greetingsyes this process is definitely long and far from
clear.we have also inquired as to what type of engineering report they
require..we have received no clear answer.we have submitted one
application with another set to start the process tomorrowthe first one
was
SMA has an intelligent dump load that works with their AC coupled systems.
It's call a Smart Load, but I don't think they have a UL listed version. SMA
has some pretty impressive technology along the lines of AC coupling that
they've chosen not to make for the US market.
Dana
Dana Brandt
Ecotech
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