[RE-wrenches] Large offgrid system

[Geoff Greenfield]

With regard to the sunny island - what is the "best" kluge to address the
120/240 issue?  (IMHO - the best would be for SMA to deliver 120/240
output).  We just did a system with a pair of outback PSX-240 transformers
to step down the SB-7000 inverter (7.2kw PV) to 120 VAC to allow it to sync
with the SI (tied into the supported loads panel).

We went with a pair (paralleled) based on capacity... next time I'd like to
reduce the parts/labor... Eaton? Torroid?  The enclosure and breakers are
nice, but do I need these breakers in this application?

For a brighter energy future,

Geoff Greenfield
President
Third Sun Solar & Wind Power Ltd.
340 West State street, Unit 25
Athens, Ohio 45701
(740) 597-3111   fax: (740)597-1548
www.third-sun.com

Clean Energy - Expertly Installed


-----Original Message-----
From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Phil
Schneider
Sent: Thursday, August 07, 2008 3:35 PM
To: RE-wrenches
Subject: Re: [RE-wrenches] Large offgrid system

Jay,

I did some design work recently for a larger capacity system.  You need a
"multi-cluster" box for more than four Sunny Islands, which would add some
complexity and cost.  I liked all the auxiliary control options possible
with the SMA - such as controlling relays for multiple AC inputs.

Phil

Phil Schneider
Creative Energies


From: jay peltz <jay at asis.com>
Reply-To: RE-wrenches <re-wrenches at lists.re-wrenches.org>
Date: Thu, 7 Aug 2008 08:24:46 -0700
To: RE-wrenches <re-wrenches at lists.re-wrenches.org>
Subject: [RE-wrenches] Large offgrid system

HI All,

I"ve got a very large off grid system,, could be 30kw of inverter
yea I know crazy big.

My question is about which inverters to use,  Outback 10 stack or SMA
sunny island.

comments, pros/ cons.

thanks,

jay

peltz power
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