[RE-wrenches] Large, off grid

[Philip Boutelle]

SMA Multi-Cluster Box, 3-phase up to 60kW using Sunny Islands

http://www.grosolar.com/documents/doc_details/294-smacluster-spec-sheet.html


On Fri, Aug 12, 2011 at 8:42 AM, <penobscotsolar at midmaine.com> wrote:

> Hello wrenches,
>   We have an opportunity to install a very large (60 kw) off grid system
> in Mexico. It is currently three phase. I do have the option of
> changing out the air conditioners (36 of them) to 120 single phase, but
> it is an added layer of complexity/cost that it would be nice to avoid.
>   The largest off grid system I've done is 21 kw so far, and it was
> single phase and fairly straightforward.
>   Does anyone know of a three phase, off grid inverter than can be
> paralleled for 500 (possibly 450) amps oputput. I am currently dealing
> with three 120 volt lines (2/0) and a neutral, running to a transformer
> to "clean up" the power from the gennie a bit. The client is determined
> to do this as he has spent about $500,000.00 USD in diesel over the
> last 5 years.I would very much like to get that transformer out of the
> picture...
>   I am well versed in the complexities/pitfalls of battery systems this
> large. I'm planning on using the Surrette YS-31series to minimize the
> footprint, as well as use Water Miser caps and install three separate
> deionizing water systems. My issue is the inverters. I have seen a
> Korean inverter, Sunsine (http://www.dongeiecos.com/) that is capable
> of this, but I am not sure I want my first install of this inverter to
> be 3000 miles away....
>   Anyone?
>
> Thanks,
> Daryl DeJoy
> NABCEP Certified PV installer
> Penobscot Solar Design
>
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