Help w/large o-t-g inverter! [RE-wrenches]

[Jeff Clearwater]

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Hey Jeff,

Stacking smaller inverters is the ticket. 
Outback sells a 10 stack that can do 3-phase and 
can do more.  The advantage is that the software 
throttles back and puts to sleep unneeded 
inverters as the power level fluctuates.

Redundancy is a good thing with inverters - to a 
point.  But at 30-40 KW I think it's the way to 
go unless you can find one big invert that had 
sophisticated partial load capability and had 
good efficiency in the lower ranges.

You can stack other inverters as well but I think 
the open architecture software of the Outback 
will be your best approach.  (I'm in no way 
affiliated with Outback),

Hope that helps,

Best,

Jeff C.




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>I'm having a heck of a time (again!) trying to 
>find a 30-40 kW o-t-g battery based inverter. I 
>need 3 phase perferably 240 or 208 VAC as I 
>don't want to feed transformer cores. I think 
>wire is cheaper and more reliable than 
>transformers and more PV to cover tare loses. 
>Even though my transmission/distribution issues 
>are not slight, I'm still leaning in this 
>direction.
>
>I would love a battery over 200 VDC but will 
>take anything. I've used the options from 
>Australia and care not to repeat the experience. 
>I have 2 applications both outside the U.S. so 
>U.L. is not going to limit my choices. Genset 
>interface and a battery charger will make life 
>easier too (since I'm askin')!
>
>Any ideas??
>
>Thanks,
>
>-jeff o
>
>
>>From the Solar, Wind and Hydro powered office of Jeff Oldham
>
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-- 
~~~~~~~~~~~~~
Jeff Clearwater
Village Power Design Associates
Sustainable Energy & Water Solutions for Home & Village
http://www.villagepower.com
gosolar at villagepower.com

530-470-9166
877-SOLARVillage
877-765-2784
425 Nimrod St.
Nevada City, CA 95959
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~`~

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