I think the AC coupled approach would be the
best. For the 10KW system, a pair of Sunny
Islands fed by Sunny Boys would make an efficient
system. Since there is no generator, the system
should be fairly straight forward.
At 02:06 AM 3/2/2012, you wrote:
i think mark was asking more about ac coupling
to get away from the horrible inefficiencies of
battery based, grid-tied inverters.
as an experiment, i have been thinking about ac
coupling one (or more) of my arrays on my
outback system to gain 10% over having the gvfx do the selling.
stc to ptc usually costs about 20%, then losing
another 10% in the inverter is a real
performance hit. i advise customers about
phantom loads and conservation, when actually
the battery based inverter is itself the big lump under the carpet!
todd
On Thursday, March 1, 2012 7:07pm, "Maverick
Brown [Maverick Solar]" <[email protected]> said:
My two cents:
"battery-based inverter w/ PV on the DC side via charge controllers"
Simply replace the GT inverter with a Xantrex
600V Charge Controller plus the 48V Grid
Interactive Inverter of your choice and added battery bank, etc.
Until the market is saturated with unneeded GT Inverters, you will be ok. ;-)
Try your best to provide enough battery for at
least 24 hours of outage at 50% DOD. You may
have add a Sub-Panel or Manual Transfer Switch.
Thanks
Maverick
Maverick Brown
BSEET, NABCEP Certified Solar PV Installer ® # 091209-26
President & CEO
Maverick Solar Enterprises, Inc.
Billing: PO BOX 1229, Dripping Springs, TX 78620
Office: 512-919-4493
Fax: 512-607-6398
Cell: 512-460-9825
Corporate:
<http://www.mavericksolarenterprises.com/>http://www.mavericksolarenterprises.com
----------
From: [email protected]
[mailto:[email protected]]
On Behalf Of [email protected]
Sent: Thursday, March 01, 2012 5:46 PM
To: RE-wrenches
Cc: 'RE-wrenches'
Subject: Re: [RE-wrenches] Grid-Tied, PV by AC or DC
excellent question mark... and one which has
been on my mind as well, being most of my work is bbgt.
todd
On Thursday, March 1, 2012 11:37am, "Mark Frye"
<[email protected]> said:
Folks,
I have a residential grid-tied customer in a net
metered utility with a favorable TOU rate.
They could use about 10 kW of PV to offset 100% of their usage.
But, they also complain about regular power
outages in their neigborhood. They don't want a generator.
With reliable AC coupling now available, do we
yet know which is the more advantagous
architecture; grid-tied, battery-based inverter
w/ PV on the DC side via charge controllers, or
grid-tied, battery-based inverter w/ PV AC
coupled via grid-tied, utility-based inverter?
Your thoughts?
Mark Frye
Berkeley Solar Electric Systems
303 Redbud Way
Nevada City, CA 95959
(530) 401-8024
<http://www.berkeleysolar.com>www.berkeleysolar.com
Sent from Finest Planet WebMail.
Sent from Finest Planet WebMail.
_______________________________________________
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
Drake Chamberlin
ATHENS ELECTRIC LLC
OH License 44810
CO license 3773
NABCEP Certified PV
_______________________________________________
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
