[RE-wrenches] AC coupling and Outback inverters

[mac Lewis]

Hi Kirk,

I would consider the Sunny Island option.  Everything integrates nicely.
 You can use the smartformer to get 240Vac if you need it at the critical
loads.  This would give the Sunny Island Frequency control over the Sunny
Boy (assuming you can run Cat 5 to the Sunny Boy).

Good Luck.

On Thu, Oct 4, 2012 at 3:10 PM, Kirk Herander <kirk at vtsolar.com> wrote:

> I have AC-coupled an Outback quad-stack with multiple SunnyBoy 6000US
> inverters and it’s been running fine for 4 years. I used the off-grid
> version of Outbacks.****
>
> Now I have an application where a customer wants to add battery backup to
> an existing SunnyBoy 5000US system. And expand his array by a couple KW. So
> I’m thinking of using a GT Outback w/ batteries to handle the critical
> loads and feed the extra 2kw of PV (charging the batteries through an MX60)
> to the grid. And I’d like to AC-couple the SunnyBoy so the original 5 kw
> array can also charge the batteries, BUT I remember, at least I think so,
> that the GT inverter cannot be AC-coupled, only the off-grid version. Is
> this correct? Thanks.****
>
> ** **
>
> Kirk Herander****
>
> VT Solar, LLC****
>
> dba Vermont Solar Engineering****
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-- 



Mac Lewis

*

"Yo solo sé que no sé nada." -Sócrates
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