mondo off-grid inverters [RE-wrenches]

[Darryl Thayer]

Chris
You have several of us interested, besides 36 kW 10
inverter 3 phase, can you give us some more specs?  Is
it stand alone?  
Can it be grid tied?  
Does it use a special Hub or special inverter?  
Can I use this technology for a 6 inverter three phase
system? (20 kW)
 
Thanks Darryl

--- Christopher Freitas  --- OutBack Power
<cfreitas at outbackpower.com> wrote:

> 
> Marco - 
> 
> There are some large stand-alone inverters out there
> - but the 
> performance is usually surprisingly poor from a
> efficiency standpoint.  
> Often the idle power consumption is in the 10% of
> the full power rating 
> (so 3000 watts for a 30KW unit) and they often weigh
> thousands of pounds 
> - real fun to move...  Most of them also are not
> "hybrid" meaning they 
> will not charge the battery either.  
> 
> We are fielding our first 36 KW three phase
> inverter/charger in the next 
> few weeks and have many single and split phase 30 to
> 36 kW off-grid 
> systems in the field now - some for several years
> already.    
> 
> Keep in mind that for 36 kW you only need TEN
> OutBack VFX3648 inverters 
> - not the "dozens" you mentioned.  Our idle power
> draw will be as low as 
> 65 W DC for a 36 kW unit depending on the AC output
> configuration.  
> Since we can turn on the additional slave inverters
> with increased load 
> the efficiency is very good across the entire power
> range.  All of the 
> parts can be carried by one person and even
> installed solo.  
> 
> From my experience and research - all of the large
> military or 
> commercial inverter you find will have a price that
> will be very high,  
> less features and the lead time and service response
> unacceptable for 
> most off-grid applications.  Most also will require
> high DC battery 
> voltages which introduces lots of design issues and
> safety concerns.  
> 
> I would be very interested in hearing other people's
> experience. 
> 
> Christopher
> 
> 
> Christopher Freitas
> OutBack Power Systems, Inc.
> cfreitas @ outbackpower.com  
> www.outbackpower.com
> Arlington WA USA
> Tel 360 435 6030  
> 
> 
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