Stand Alone PV system volt / amp problem [RE-wrenches]

[Barbra Kerr]

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Chris - 

Regarding item #1 - Phil is on the money 

Regarding item #2 - If the inspector still insists on 100amps feeding, just 
derate the main CB at the panel. 

Great questions.  Good luck 

Barbra Kerr
Kerr Enterprises, Inc 


Chris Anderson writes: 

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> Any help on this one would be appreciated.  
> 
> We have an off grid home, where we have installed 12 Shell 160's 6x2 on
> an Outback VFX 2548 with 8 6v Concorde Batteries. The system is feeding
> a 100 amp Square D main distribution center. Given the inverter output
> is only 120 volt, we fed inverter output L1 to one leg of the 100 amp
> main breaker at the top of the main distribution panel and jumpered over
> to the second bus/lug on the main breaker in order to electrify both
> bus' in the panel with 120v power. There is a 50amp breaker on the AC
> output circuit of the inverter. 
> 
> I have two problems. 
> 
> 1. I have got an inspector who is saying that manufactured homes MUST be
> fed by 240V power. He is adamant that the main distribution panel must
> be fed by 240v. We have jumpered the bus in grid tie battery back-up
> systems like this before, but never on an off grid. Anyone have any
> thoughts here or can point me to a code section that either confirms or
> negates what we have done?  
> 
> 2. The inspector is also saying that panel must be fed with the amps
> indicated on the main breaker. In this case, the main breaker is
> 100amps, therefore it must be fed with 100A. Either that or the main can
> be replaced if a load calc is done and the home is "de-amped". He has
> taken issue with the 100 amp main being fed by the inverter given the 50
> amp breaker on the AC output side of the inverter. 
> 
> Any help/insight on these two issues would be greatly appreciated. 
> Thanks in advance. 
> 
>  
>  
> Chris Anderson
> Borrego Solar Systems, Inc.                                           
> 727 Allston Way, Suite B 
> Berkeley, CA 94710
> Tel. - 510-843-1113 x 105
> Fax - 510-843-1116
> Cell - 510-501-7062
>   
> 
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