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 R # 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: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of toddc...@finestplanet.com 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" <ma...@berkeleysolar.com> 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.
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