Big Offgrid System Request for Guidance [RE-wrenches]

[Jay Peltz, Peltz Power]

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Hi Allan,

I would add the SMA sunny island which can be set up quite big, you  
should talk to J Berdner about that.

And assuming the loads are going to be larger than that, you'll have  
to do multiple services.

My question is what kind of battery banks are folks using for these  
massive systems?

thanks,
jay

peltz power


On Apr 14, 2008, at 2:51 PM, Allan Sindelar wrote:

>
>
> Wrenches,
> We have been tasked with designing, supplying and installing an
> off-the-scale power system for a high-end lodge. No ground has been  
> broken
> yet, but plans are in place and the project is real. It will  
> include one or
> two generators.
>
> Very preliminary load profile is estimated at well over 300  
> kilowatt-hours
> per day before system losses. Actual load profile will likely be  
> less, but
> not significantly so. Two preliminary quotes (design time all to be  
> billed,
> yes) is 1) all load supplied by PV with emergency use of generator,  
> and 2)
> 50% gennie to load.
>
> Obviously, this is well above the normal scale of off-grid systems,  
> and thus
> larger than the systems we have done to date. As such, in those few  
> cases
> where these kinds of questions have come up on the list, I haven't  
> saved the
> messages. So my request for help is focused on these questions:
>
> 1)	Whose equipment is capable of this kind of load profile? Xantrex XW
> appears to limit at 18kW, Outback at 36kW. What else is out there that
> works? It must be monitorable by satellite internet.
> 2)	Mechanicals could end up being over 1,000' from the lodge. This  
> is a
> long distance to run AC. Who makes higher-voltage equipment, such  
> as 480V
> (hopefully nobody, but I need to know the range of options)? As an
> alternative, how is single-phase 240VAC best carried long distances  
> - that
> is, is big wire better than a pair of transformers?
> 3)	What are the keywords or dates that would let me search Topica
> archives for past relevant posts?
> 4)	Who has done this before, that would care to contact me off-list
> concerning serving as a paid consultant on this project at key  
> points in the
> design development and installation?
>
> Thank you,
> Allan at Positive Energy
>
> Allan Sindelar
> allan_(at)_positiveenergysolar.com  
> <mailto:allan at positiveenergysolar.com>
> NABCEP certified solar PV installer
> Positive Energy, Inc.
> 3225A Richards Lane
> Santa Fe NM 87507
> 505 424-1112
>
>
> [Non-text portions of this message have been removed]
>
>
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