three battery-based inverters? [RE-wrenches]

Matt Tritt solarone at charter.net
Thu May 1 09:02:36 PDT 2008


Have you spoken with John Berdner at SMA about this application? I think that would be the starting point for this kind of system. Yes?

Matt T
---- Phil Schneider <phil at CEsolar.com> wrote: 
> 
> Hi Jay,
> 
> I¹m considering three Sunny Islands, grid-connected, with a generator as
> well.  Desired AC capacity is about 13 kW.  AC coupling with Sunny Boys.
> Possible DC sources in the future.  Web-based functions of Sunny Island are
> desired.
> 
> I think I'm going to steer this one down to two Sunny Islands, but for the
> sake of discussion, any reason why an autotransformer couldn't be used in
> the three inverter case to balance the load between the two legs?  Thanks
> all.
> 
> P. 
> 
> Phil Schneider
> Creative Energies
> Lander, WY
> 
> 
> 
> 
> From: "Jay Peltz, Peltz Power" <jay at asis.com>
> Reply-To: <RE-wrenches at topica.com>
> Date: Thu, 1 May 2008 07:52:24 -0700
> To: <RE-wrenches at topica.com>
> Subject: Re: three battery-based inverters? [RE-wrenches]
> 
> 
> Hi Phil,
> 
> Well it also depends on how much AC inverter output you need.
> 
> 3 x XW's are way bigger than 3 outbacks.
> 
> jay
> 
> peltz power
> On Apr 30, 2008, at 8:46 PM, Phil Schneider wrote:
> 
> >
> > Wrenches,
> >
> > In a battery-based system have any of you used three inverters in a
> > 120/240
> > configuration with an autotransformer to help balance the capacity
> > between
> > the two legs?  We've recently considered a couple designs where
> > desired
> > inverter capacity points to three inverters, and four feels pretty
> > excessive.  It seems that XW would be convenient in this case with
> > built in
> > split-phase output from each inverter.  In the past I have pushed
> > for four
> > inverters if budget allows, but I'm interested to know what your
> > experience
> > and thoughts are.
> >
> > P.
> >
> > Phil Schneider
> > Creative Energies
> > Lander, WY
> >
> >
> >
> 
> 
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