grid-tie inverters & generators [RE-wrenches]

[Kurt Albershardt]

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Critical circuits would be ideal, but the design gets complicated quickly when you try to accommodate utility interconnection requirements.  If I backfeed the critical circuits panel and put an ATS or MTS ahead of that, when the genset fires up the UL1741 inverter should ideally sync to (and reduce the load on) the genny.

Would love a safe, reliable way to do this without a genny, providing daytime power to run a few critical loads.  If I could wake up something like a small Exeltech would the big inverters sync to it?  Would the Exeltech overload and drop out before the load could be shared, or would I need coordinated switchgear to manage the changeover?




--On Wednesday, June 04, 2008 6:35 AM -0700 daryl_solar at yahoo.com wrote:

>
> I have tried something like this, not with SMA however.  to determine if  my experiance is relevent, what is the max load to be served?  Is this a critical curcits situatuion, or total load?    Are batteries to be part of the picture?
> Darryl
>
>
> --- On Tue, 6/3/08, Kurt Albershardt <info at es-ee.com> wrote:
>
>> From: Kurt Albershardt <info at es-ee.com>
>> Subject: RE: grid-tie inverters & generators [RE-wrenches]
>> To: RE-wrenches at topica.com
>> Date: Tuesday, June 3, 2008, 6:00 PM
>>
>> I am interested in what others have learned about grid tie
>> and engine-generators.  Seems silly to idle all that
>> expensive PV just because the utility has a bad day or
>> three...









.


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