outback-generator-on grid [RE-wrenches]

[Todd Cory, Mt. Shasta Energy Services]

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IMO this is the biggest wart with the Outback grid intertied inverter. 
Only one AC input? What about the 99% of grid tie customers who want 
generator backup for their RE back up system?

I think the DC genny kludge is unfortunately at present the only real 
usable option. I have not done one of these, but as I understand it, the 
120 VAC generator output goes to a 2:1 step down transformer, where it 
is rectified and slammed into an MX60 for battery charging. The only 
other option is an external transfer switch on the AC output of the 
inverter to switch the backed up loads from the inverter to the genny.

Todd



Keith Cronin wrote:

>We have a client who would like to have a 5.6kW pv system with 2-3048's and
>12-AGM 8D batteries and it is on grid with a 325 amp service.
>
> 
>
>The property is about 5 acres with multiple cottages that they desire to run
>a few items in each in the event of a power failure.
>
> 
>
>They are looking at getting a 15kW generator to supplement things in the
>event of an extended power failure.
>
> 
>
>What is the general consensus on the genny- do we go with a DC flavored one
>to keep the batteries topped off? I am wondering due to the situation of
>Outback's single input situation now.
>
> 
>
>Any thoughts would be appreciated.
>
> 
>
>Aloha
>  
>


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